overview

1. Purpose

<p class="MsoNormal">The RT6246B is an advanced constant on-time (ACOT^™) mode synchronous buck converter with the input voltage range from 4.5V to 18V and provides 6A output current. This document explains the function and use of the RT6246B evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements.</p>

2. Introduction

<h3>General Product Information</h3> <p class="bady">The RT6246B is an advanced constant on-time (ACOT^™) mode synchronous buck converter. The main control loop of the RT6246B using an advanced constant on-time (ACOT^™) mode control which provides a very fast transient response. The RT6246B operates from 4.5V to 18V input voltage, the output voltage can be programmed between 0.6V to 5.1V.</p> <h3>Product Feature</h3> <ul> <li>Input Voltage Range : 4.5V to 18V</li> <li>6A Output Current</li> <li>ACOT^™Mode Performs Fast Transient Response</li> <li>ACOT^™Architecture to Enable All MLCC Output Capacitor Usage</li> <li>Fixed 500kHz Switching Frequency</li> <li>High Efficient Internal Power MOSFET Switch 30mΩ (High-Side) and 15mΩ (Low-Side)</li> <li>Adjustable Output Voltage from 0.6V to 5.1V</li> <li>Pre-biased Soft-Start</li> <li>Cycle-by-Cycle Over-Current Protection</li> <li>Input Under-Voltage Lockout</li> <li>Thermal Shutdown Protection</li> <li>Output Over/Under-Voltage Protection</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: 17pt;"> <td valign="top" style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Key Features</p> </td> <td valign="top" style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Evaluation Board Number: PCB091_V1 </p> </td> </tr> <tr style="height: 17pt;"> <td valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Input Voltage</p> </td> <td valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">12V</p> </td> </tr> <tr style="height: 17pt;"> <td valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Max Output Current</p> </td> <td valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">6A</p> </td> </tr> <tr style="height: 17pt;"> <td valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Output Voltage</p> </td> <td valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">3.3V</p> </td> </tr> <tr style="height: 17pt;"> <td valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Marking & Package Type</p> </td> <td valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">RT6246BHGQUF, UQFN-12HL 3x3 (FC)</p> </td> </tr> <tr style="height: 17pt;"> <td valign="top" style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Operation Frequency</p> </td> <td valign="top" style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Steady 500kHz at all loads</p> </td> </tr> </tbody> </table>

4. Bench Test Setup Conditions

<h3>Headers Description and Placement</h3> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image001_en.png" class="fancybox"><img width="378" height="252" width="378" height="252" id="圖片 5" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image001_en.png" /></a></p> <p class="2">Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at <a href="mailto:evb_service@richtek.com" class="link">evb_service@richtek.com</a>.</p>

5. Test Points

<p class="MsoNormal">The EVB is provided with the test points and pin names listed in the table below.</p> <table width="680" class="MsoNormalTable" style="border: currentColor; width: 510.2pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 11.76%; height: 17pt;"> <p class="23CxSpFirst">Test point/</p> <p class="23CxSpMiddle">Pin name</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 17pt;"> <p class="23CxSpMiddle">Signal</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 17pt;"> <p class="23CxSpLast">Comment (expected waveforms or voltage levels on test points)</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">VIN</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="ListParagraph1CxSpLast">Input voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">Power input. Support 4.5V to 18V Input Voltage. Must bypass with a suitable large ceramic capacitor at this pin.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1">EN</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="MsoNormal">Enable test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">Enable control. Pull this pin high to turn on the Buck. Do not leave this pin floating.</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">GND</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Ground</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 17pt;"> <p class="MsoNormal">Ground.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">PGOOD</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="ListParagraph1CxSpLast">Power good test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">Power good Indicator. Open drain output when the output voltage is within 90% to 120% of regulation point. </p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">FB</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="ListParagraph1CxSpLast">Feedback voltage input</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">The pin is used to set the output voltage of the converter to regulate to the desired voltage via a resistive divider. Feedback reference = 0.6V.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1">VCC</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="MsoNormal">Internal regulator output</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">5V linear regulator Output for Internal Control Circuit. A capacitor (typical 1µF) should be connected to AGND. Don’t connect to external Load.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1">BOOT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="MsoNormal">Bootstrap supply test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">Bootstrap supply for high-side gate driver. Connect a 0.1µF ceramic capacitor between the BOOT and SW pins.</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 17pt;"> <p class="ListParagraph1">LX</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 17pt;"> <p class="MsoNormal">Switch node test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 17pt;"> <p class="MsoNormal">Connect this pin to an external L-C filter.</p> </td> </tr> <tr style="height: 51pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 51pt;"> <p class="ListParagraph1">BYP</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 51pt;"> <p class="MsoNormal">Bypass test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 51pt;"> <p class="MsoNormal">Bypass input for the internal LDO. BYP is externally connected to the output of switching regulator. When the BYP voltage rises above the bypass switch turn-on threshold, the LDO regulator shuts down and the VCC pin is connected to the BYP pin through an internal switch.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 11.76%; height: 1cm;"> <p class="ListParagraph1">ILIMT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.12%; height: 1cm;"> <p class="MsoNormal">Current limit seeting</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 64.12%; height: 1cm;"> <p class="MsoNormal">Current limit setting pin. The current limit is set to 4A, 6A or 8A when this pin is pull low, floating or pull high respectively.</p> </td> </tr> </tbody> </table>

6. 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. Set the jumper at J7 to connect terminals 2 and 3, connecting EN to VIN through resistor REN, to enable operation.</p> <p class="MsoListParagraph">4. Verify the output voltage (approximately 3.3V) between VOUT and GND.</p> <p class="MsoListParagraph">5. Connect an external load up to 6A to the VOUT and GND terminals and verify the output voltage and current.</p>

7. Output Voltage Setting

<p class="MsoNormal">Set the output voltage with the resistive divider (R4, R5) between VOUT and GND with the midpoint connected to FB. The output is set by the following formula:</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image002_en.jpg" class="fancybox"><img width="118" height="38" width="118" height="38" id="圖片 17" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image002_en.jpg" /></a></p>

8. Schematic, Bill of Materials & Board Layout

<h3>EVB Schematic Diagram</h3> <p class="21"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image003_en.jpg" class="fancybox"><img width="681" height="333" width="681" height="333" 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_rt6246bhgquf/html-images/image003_en.jpg" /></a></p>

9. Bill of Materials

<table width="680" class="MsoNormalTable" style="border: currentColor; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 16.66%; height: 17pt;"> <p class="MsoNormal">Reference</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 17pt;"> <p class="MsoNormal">Qty</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 17pt;"> <p class="MsoNormal">Part Number</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 17pt;"> <p class="MsoNormal">Description</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 17pt;"> <p class="MsoNormal">Package</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 17pt;"> <p class="MsoNormal">Manufacturer</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal"><a name="_Toc409666848">U1</a></p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">RT6246BHGQUF</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">DC-DC Converter</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">UQFN-12HL 3x3 (FC)</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">RICHTEK</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">C3</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C1608X5R0J475KT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">4.7µF/6.3V/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">C4</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C1608X5R1E105KT000E</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1µF/25V/X5R/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">C6, C9, C15, C16</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">4</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C1608X7R1H104KT000N</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">0.1µF/50V/X7R/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">C7</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">0603N680J500</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">68pF/50V/NPO/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">C8, C10</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt;"> <p class="MsoNormal">2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt;"> <p class="MsoNormal">UMK325BJ106MM</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt;"> <p class="MsoNormal">10µF/50V/X5R/1210</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt;"> <p class="MsoNormal">C-1210</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt;"> <p class="MsoNormal">TAIYO YUDEN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">C11, C12</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C3225X5R1E226MT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">22µF/25V/X5R/1210</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">C-1210</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">L1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">7443552200</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">2µH</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">L-GSCDK104</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WE</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R3, R19</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WR06X1003FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">100k/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R4</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">RTT039092FTP</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">90.9k/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R5</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WR06X2002FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">20k/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R11</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WR06X3602FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">36k/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R12, R15</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WR06X000PTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">0R/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R16</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WR06X7502FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">75k/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 15.6pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.66%; height: 15.6pt;"> <p class="MsoNormal">R18</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 6.16%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.9%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WR06X1002FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.34%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">10k/0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 19.4%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 15.54%; height: 15.6pt; white-space: nowrap;"> <p class="MsoNormal">WALSIN</p> </td> </tr> </tbody> </table>

10. PCB Layout

<p class="23CxSpFirst"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image004_en.jpg" class="fancybox"><img width="378" height="271" width="378" height="271" 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_rt6246bhgquf/html-images/image004_en.jpg" /></a></p> <p class="23CxSpMiddle">Top View (1^st layer)</p> <p class="MsoNormal"> <a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image005_en.jpg" class="fancybox"><img width="378" height="270" width="378" height="270" id="圖片 15" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image005_en.jpg" /></a></p> <p class="10">PCB Layout—Inner Side (2^nd Layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image006_en.jpg" class="fancybox"><img width="378" height="271" width="378" height="271" id="圖片 3" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image006_en.jpg" /></a></p> <p class="10">PCB Layout—Inner Side (3^rd Layer)</p> <p class="MsoNormal"> <a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image007_en.jpg" class="fancybox"><img width="378" height="271" width="378" height="271" id="圖片 16" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt6246bhgquf/html-images/image007_en.jpg" /></a></p> <p class="10">Bottom View (4^th Layer)</p>