overview

1. Purpose

<p class="MsoNormal">The RT7298BL is a synchronous step-down converter with current mode control, which can deliver up to 6A output current from a wide input voltage range of 4.5V to 18V.This document explains the function and use of the RT7298BL evaluation board (EVB) and provides information to enable operation and modification of the evaluation board and circuit to suit individual requirements.</p>

2. Introduction

<h3>General Product Information</h3> <p class="bady">The RT7298BL is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The RT7298BL current-mode architecture with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during startup. Fault condition protections include output under-voltage protection, output over-voltage protection, and over temperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7298BL is available in WQFN-14AL 3.5x3.5 package.</p> <h3>Product Feature</h3> <ul> <li>Low R_DS(ON) Power MOSFET Switches 26mΩ/19mΩ</li> <li>Input Voltage Range : 4.5V to 18V</li> <li>Adjustable Switching Frequency : 200kHz to 1.6MHz</li> <li>Current-Mode Control</li> <li>Synchronous to External Clock : 200kHz to 1.6MHz</li> <li>Accurate Voltage Reference : 0.6V ± 1.25%</li> <li>Monotonic Start-Up into Pre-biased Outputs</li> <li>Adjustable Soft-Start</li> <li>Power Good Indicator</li> <li>Under-Voltage and Over-Voltage Protection</li> <li>Input Under-Voltage Lockout</li> <li>RoHS Compliant and Halogen Free</li> </ul>

3. Key Performance Summary Table

<table width="100%" class="MsoTableLightListAccent2" style="border: currentColor; width: 100%; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody><tr style="height: 16.7pt;"> <td width="34%" valign="top" style="background: rgb(0, 158, 184); padding: 0cm 5.4pt; border: 1pt solid rgb(0, 158, 184); width: 34.94%; height: 16.7pt;"> <p class="ListParagraph1CxSpFirst">Key Features</p> </td> <td width="65%" valign="top" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 16.7pt;"> <p class="ListParagraph1CxSpLast">Evaluation Board Number: PCB006_V1</p> </td> </tr> <tr style="height: 15.45pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 15.45pt;"> <p class="ListParagraph1CxSpFirst">Default Input Voltage</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 15.45pt;"> <p class="ListParagraph1CxSpLast">12V</p> </td> </tr> <tr style="height: 15.45pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 15.45pt;"> <p class="ListParagraph1CxSpFirst">Max Output Current</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 15.45pt;"> <p class="ListParagraph1CxSpLast">6A</p> </td> </tr> <tr style="height: 15.45pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 15.45pt;"> <p class="ListParagraph1CxSpFirst">Default Output Voltage</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 15.45pt;"> <p class="ListParagraph1CxSpLast">1.0V</p> </td> </tr> <tr style="height: 15.45pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 15.45pt;"> <p class="ListParagraph1CxSpFirst">Default Marking & Package Type</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 15.45pt;"> <p class="ListParagraph1CxSpLast">RT7298BLGQW, WQFN-14AL 3.5x3.5</p> </td> </tr> <tr style="height: 15.45pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 15.45pt;"> <p class="ListParagraph1CxSpFirst">Operation Frequency</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 15.45pt;"> <p class="ListParagraph1CxSpLast">Steady 500kHz at all loads</p> </td> </tr> <tr style="height: 14.75pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 14.75pt;"> <p class="ListParagraph1CxSpFirst">Other Key Features</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 14.75pt;"> <p class="ListParagraph1CxSpMiddle">4.5V to 18V Input Voltage Range</p> <p class="ListParagraph1CxSpMiddle">Programmable Soft-Start, Adjustable Switching Frequency</p> <p class="ListParagraph1CxSpLast">Synchronous to External Clock</p> <p class="MsoNormal">Power Good Indicator</p> </td> </tr> <tr style="height: 30.2pt;"> <td width="34%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 34.94%; height: 30.2pt;"> <p class="ListParagraph1CxSpFirst">Protection</p> </td> <td width="65%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 30.2pt;"> <p class="ListParagraph1CxSpMiddle">Output Under-Voltage Protection (Latch-Off mode)</p> <p class="ListParagraph1CxSpMiddle">Output Over-Voltage Protection</p> <p class="ListParagraph1CxSpMiddle">Cycle-by-cycle Current Limit</p> <p class="ListParagraph1CxSpLast">Thermal Shutdown</p> </td> </tr> </tbody></table>

4. Bench Test Setup Conditions

<h3>Headers Description and Placement</h3> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image001_en.jpg"><img width="421" height="303" id="圖片 3" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image001_en.jpg" /></a></p> <p class="2">Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to <a class="link" href="mailto:evb_service@richtek.com">evb_service@richtek.com</a></p> <h3>Test Points</h3> <p class="MsoNormal">The EVB is provided with the test points and pin names listed in the table below.</p> <table width="100%" class="MsoTableLightListAccent2" style="border: currentColor; width: 100%; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody><tr> <td width="14%" valign="top" style="background: rgb(0, 158, 184); padding: 0cm 5.4pt; border: 1pt solid rgb(0, 158, 184); width: 14.76%;"> <p class="23CxSpFirst">Test point/</p> <p class="23CxSpMiddle">Pin name</p> </td> <td width="27%" valign="top" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%;"> <p class="23CxSpMiddle">Signal</p> </td> <td width="58%" valign="top" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%;"> <p class="23CxSpLast">Comment (expected waveforms or voltage levels on test points)</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">VIN, VIN_EXT</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Input voltage</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">Input voltage range= 4.5V to 18V</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">VOUT</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Output voltage </p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Default output voltage = 1.0V</p> <p class="ListParagraph1CxSpMiddle">Output voltage range= 0.6V to 8V </p> <p class="ListParagraph1CxSpLast">(see ‘’ Output Voltage Setting’’ section for changing output voltage level)</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">LX</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Switching node test point</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">LX waveform</p> </td> </tr> <tr style="height: 29.2pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 29.2pt;"> <p class="ListParagraph1CxSpFirst">EN</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 29.2pt;"> <p class="ListParagraph1CxSpMiddle">Enable test point</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 29.2pt;"> <p class="ListParagraph1CxSpLast">Enable signal. Floating this EN pin or connecting this pin to pull high enable operation; connecting this pin to GND can disable the device.</p> </td> </tr> <tr style="height: 12.25pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 12.25pt;"> <p class="ListParagraph1CxSpFirst">SYNC</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 12.25pt;"> <p class="ListParagraph1CxSpLast">Ext Frequency Sync Input</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 12.25pt;"> <p class="MsoNormal">External Frequency Synchronization Input. Connecting external clock to this pin changes the switching frequency.</p> </td> </tr> <tr style="height: 25.45pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 25.45pt;"> <p class="ListParagraph1CxSpFirst">BS</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 25.45pt;"> <p class="ListParagraph1CxSpMiddle">Boot strap supply test point</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 25.45pt;"> <p class="ListParagraph1CxSpLast">Floating supply voltage for the high-side N-MOSFET switch </p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">GND</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Ground</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">Ground</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">SS</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Soft-start control test point</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">Soft start waveform</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">VCC_EXT</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">External Voltage for PG</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">External voltage terminal for PG pull-up voltage.</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">PG</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Power good output test point</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">Connected to VCC_EXT through RPG1, Power Good Indicator</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">JP2</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">VIN & PVIN control</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">Install jumper to combine or separate VIN and PVIN.</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">JP1</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">PG control</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">VIN voltage terminal for PG pull-up voltage.</p> </td> </tr> <tr style="height: 15pt;"> <td width="14%" valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 14.76%; height: 15pt;"> <p class="ListParagraph1CxSpFirst">J9</p> </td> <td width="27%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 27.04%; height: 15pt;"> <p class="ListParagraph1CxSpMiddle">Chip enable control</p> </td> <td width="58%" valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 58.2%; height: 15pt;"> <p class="ListParagraph1CxSpLast">Install jumper or drive EN directly to enable or disable operation</p> </td> </tr> </tbody></table>

5. Power-up & Measurement Procedure

<p class="MsoListParagraph">1.Connect input power (4.5V < V_IN < 18V) and input ground to VIN and GND test pins respectively.</p> <p class="MsoListParagraph">2.Connect positive end and negative terminals of load to VOUT and GND test pins respectively.</p> <p class="MsoListParagraph">3.There is a 3-pin header “EN” for enable control. To use a jumper at “H” option to tie EN test pin to input power VIN for enabling the device. Inversely, to use a jumper at “L” option to tie EN test pin and ground GND for disabling the device.</p> <p class="MsoListParagraph">4.The PVIN and VIN pins can be connected together using a jumper across “Combine” by the 3-pin header JP2. Inversely, these two input rails can be separated by using a jumper across “Separate” if desired.</p> <p class="MsoListParagraph">5.The 2-pin header JP1 “VIN-PG” is for PGOOD pin supply, when using a jumper across this header, the PG signal can be supplied by VIN pin Voltage.</p> <p class="MsoListParagraph">6.Verify the output voltage (approximately 1.0V) between VOUT and GND.</p> <p class="MsoListParagraph">7.Connect an external load up to 6A to the VOUT and GND terminals and verify the output voltage and current.</p> <h3>Output Voltage Setting</h3> <p class="MsoNormal">Set the output voltage with the resistive divider (R1, R2) between VOUT and GND with the midpoint connected to FB. The output is set by the following formula:</p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image003_en.png"><img width="109" height="48" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image003_en.png" /></a></p> <p class="MsoNormal">The installed VOUT capacitors (C5, C6) are 22μF, 16V X5R ceramic types. Do not exceed their operating voltage range and consider their voltage coefficient (capacitance vs. bias voltage) and ensure that the capacitance is sufficient to maintain stability and provide sufficient transient response for your application. This can be verified by checking the output transient response as described in the RT7298B IC datasheet.</p>

6. Schematic, Bill of Materials & Board Layout

<h3>EVB Schematic Diagram</h3> <h3><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image004_en.jpg"><img width="680" height="326" id="圖片 5" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image004_en.jpg" /></a></h3> <p class="2">C4: 10μF/50V/X5R, 1206, TDK C3216X5R1H106K</p> <p class="2">C2, C5, C6: 22μF/16V/X5R, 1210, Murata GRM32ER61C226K</p> <p class="2">L1: 1.4μH TAIYO YUDEN NR8040T1R4N, DCR=7mΩ</p> <h3>Bill of Materials</h3> <table width="100%" class="MsoTableLightListAccent2" style="border: currentColor; width: 100%; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody><tr style="height: 15.6pt;"> <td width="17%" style="background: rgb(0, 158, 184); padding: 0cm 5.4pt; border: 1pt solid rgb(0, 158, 184); width: 17.36%; height: 15.6pt;"> <p class="MsoNormal">Reference</p> </td> <td width="4%" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 15.6pt;"> <p class="MsoNormal">Qty</p> </td> <td width="23%" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 15.6pt;"> <p class="MsoNormal">Part number</p> </td> <td width="23%" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 15.6pt;"> <p class="MsoNormal">Description</p> </td> <td width="16%" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 15.6pt;"> <p class="MsoNormal">Package</p> </td> <td width="14%" style="background: rgb(0, 158, 184); border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: rgb(0, 158, 184) rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 15.6pt;"> <p class="MsoNormal">Manufacture</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">U1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">RT7298BLGQW</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">DC-DC Converter</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">WQFN-14AL 3.5x3.5</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">RICHTEK</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">C4</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">C3216X5R1H106K160AB</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">10μF/±10%/50V/X5R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">1206</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">C2, C5, C6</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">3</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">GRM32ER61C226KE20#</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">22μF/±10%/16V/X5R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">1210</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">CSS</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">GRM32MR71H103KA01#</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">10nF/±10%/50V/X7R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">C_COMP1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">GRM31CR71A822KA01</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">8.2nF/±10%/50V/X7R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">C_COMP2</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">0603B181K500CT</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">180pF/±10%/50V/X7R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">C3, C7, CBOOT</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">3</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">C1608X7R1H104K080AA</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">0.1μF/±10%/50V/X7R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">C1, CFF, C2F, CEN, REN2, RTR1, RTR2, RPG2, D1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">0</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">Not Installed</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">L1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">NR8040T1R4N</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">1.4μH/9.0A/±30%, DCR=7mΩ, Inductor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">8mmx8mmx4mm</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> <p class="MsoNormal">TAIYO YUDEN</p> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">R1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">16kΩ/±1%, Resistor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">R2</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" nowrap="" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">24kΩ/±1%, Resistor</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">R_COMP</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" nowrap="" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">0.68kΩ/±1%,</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">RT, REN1, RPG1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">3</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" nowrap="" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">100kΩ/±1%,</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> <p class="MsoNormal">0603</p> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">JP1</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">1</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">2-Pin Header</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">JP2, J9</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">2</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">3-Pin Header</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">GP</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">11</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">VIN_EXT, BS, SS, TRACK, EN, LX, SYNC, PG, VCC_EXT, VIN, GND</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">Golden Pin</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> <tr style="height: 1pt;"> <td width="17%" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184); padding: 0cm 5.4pt; width: 17.36%; height: 1pt;"> <p class="MsoNormal">J3, J4</p> </td> <td width="4%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 4.76%; height: 1pt;"> <p class="MsoNormal">2</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.38%; height: 1pt;"> <p class="MsoNormal">VOUT, GND</p> </td> <td width="23%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 23.8%; height: 1pt;"> <p class="MsoNormal">Test Pin</p> </td> <td width="16%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 16%; height: 1pt;"> </td> <td width="14%" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor rgb(0, 158, 184) rgb(0, 158, 184) currentColor; padding: 0cm 5.4pt; width: 14.68%; height: 1pt;"> </td> </tr> </tbody></table>

7. EVB Layout

<p class="23CxSpFirst"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image005_en.png"><img width="493" height="353" id="圖片 14" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image005_en.png" /></a></p> <p class="23CxSpMiddle">Top View (1^stlayer)</p> <p class="23CxSpMiddle"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image006_en.png"><img width="494" height="354" id="圖片 13" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image006_en.png" /></a></p> <p class="23CxSpLast">Bottom View (4^th Layer)</p> <p class="23CxSpFirst"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image007_en.jpg"><img width="474" height="340" id="圖片 12" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image007_en.jpg" /></a></p> <p class="23CxSpMiddle">Component Placement Guide—Component Side (1^stlayer)</p> <p class="23CxSpMiddle"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image008_en.jpg"><img width="471" height="340" id="圖片 11" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image008_en.jpg" /></a></p> <p class="23CxSpMiddle">PCB Layout—Component Side (1^stLayer)</p> <p class="23CxSpMiddle"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image009_en.png"><img width="476" height="341" id="圖片 10" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt7298blgqw/html-images/image009_en.png" /></a></p> <p class="23CxSpLast">PCB Layout—Bottom Side (4^th layer)</p>