overview

1. Purpose

<p class="MsoNormal">The RT8008 is a high-efficiency 1.5MHz current mode synchronous step-down regulator that can deliver up to 600mA output current from an input voltage range of 2.5V to 5.5V. This document explains the function and use of the RT8008 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 RT8008 is a high-efficiency pulse-width-modulated (PWM) step-down DC/DC converter. Capable of delivering 600mA output current over an input voltage range of 2.5V to 5.5V, the RT8008 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery (or from other power sources within that range) such as cellular phones, PDAs and handy-terminals. </p> <p class="bady">An internal synchronous rectifier with low R_DS(ON) dramatically reduces conduction losses in PWM mode. No external Schottky diode is required in practical applications. The RT8008 automatically turns off the synchronous rectifier when the inductor current is low entering discontinuous PFM mode to increase efficiency at light loads.</p> <p class="bady">The RT8008 enters Low-Dropout mode when normal PWM operation cannot regulate the output voltage, turning on the upper P-MOSFET continuously. The RT8008 enters shutdown mode and consumes less than 0.1μA when EN pin is pulled low.</p> <p class="bady">The switching ripple is easily smoothed-out by small sized filtering elements due to a fixed operating frequency of 1.5MHz. This, along with its small SOT-23-5 and TSOT-23-5 packages provides a small PCB area. Other features include soft start, low internal reference voltage with 2% accuracy, over temperature protection, and over current protection.</p> <h3>Product Feature</h3> <ul> <li style="color: #231f20;">2.5V to 5.5V Input Range</li> <li style="color: #231f20;">Adjustable Output from 0.6V to VIN</li> <li style="color: #231f20;">1.0V, 1.2V, 1.5V, 1.8V, 2.5V and 3.3V Fixed/ Adjustable Output Voltage</li> <li style="color: #231f20;">600mA Output Current, 1A Peak Current</li> <li style="color: #231f20;">95% Efficiency</li> <li style="color: #231f20;">No Schottky Diode Required</li> <li style="color: #231f20;">1.5MHz Fixed Frequency at PWM Operation</li> <li style="color: #231f20;">Small SOT-23-5 and TSOT-23-5 Package</li> <li style="color: #231f20;">RoHS Compliant and 100% Lead (Pb)-Free</li> </ul>

3. Key Performance Summary Table

<div> <table class="MsoNormalTable" style="border: currentColor; width: 510.2pt; border-collapse: collapse;" cellpadding="0" cellspacing="0" border="1" width="680"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Key features</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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">Evaluation board number: PCB003_V1</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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default 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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">5V</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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Max Output Current</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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">600mA </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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Output 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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">1.2V</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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Marking & Package Type</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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">RT8008GB, SOT-23-5</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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Operation Frequency</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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">Steady 1.5MHz at PWM</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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Other Key Features</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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">PSM/ PWM Auto Switched.</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: 164.25pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Protection</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: 305.85pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">Over Current Protection, Over Temperature Protection</p> </td> </tr> </tbody> </table> </div>

4. Bench Test Setup Conditions

<h3>Headers Description and Placement</h3> <p class="MsoNormal"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image001.gif" class="fancybox"><img style="height: 277px; width: 385px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image001_en.gif" height="277" width="385" /></a></p> <p class="1CxSpFirst">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 href="mailto:evb_service@richtek.com" class="link">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> <div> <table class="MsoNormalTable" style="border: currentColor; width: 510.2pt; border-collapse: collapse;" cellpadding="0" cellspacing="0" border="1" width="680"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 69.05pt; height: 17pt;"> <p class="1CxSpFirst">Test point/</p> <p class="1CxSpMiddle">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: 126.5pt; height: 17pt;"> <p class="1CxSpMiddle">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: 243.9pt; height: 17pt;"> <p class="1CxSpLast">Comment (expected waveforms or voltage levels on test points)</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: 69.05pt; height: 17pt;"> <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: 126.5pt; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">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: 243.9pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">Input voltage range= 2.5V to 5.5V</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: 69.05pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">VOUT</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: 126.5pt; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">Output 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: 243.9pt; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">Default Output Voltage = 1.2V</p> <p class="ListParagraph1CxSpMiddle">Output voltage range= 0.6V to 5V</p> <p class="ListParagraph1CxSpLast">(see ‘’ Output Voltage Setting’’ section for changing output voltage level)</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: 69.05pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">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: 126.5pt; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">Switching 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: 243.9pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">LX waveform</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: 69.05pt; height: 17pt;"> <p class="ListParagraph1CxSpFirst">J1</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: 126.5pt; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">Chip Enable control</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: 243.9pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">Drive EN or install a shorting block on Jumper J1 to enable operation (shorting 1-2) or disable operation (shorting 2-3). </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: 69.05pt; 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: 126.5pt; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">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: 243.9pt; height: 17pt;"> <p class="ListParagraph1CxSpLast">Ground</p> </td> </tr> </tbody> </table> </div>

5. Power-up & Measurement Procedure

<p class="MsoNormal">1.Apply a 5V nominal input power supply (2.5V < V_IN < 5.5V) to the VIN and GND terminals.</p> <p class="MsoNormal">2.Place a shorting block across pins 1 and 2 of the J1 jumper to connect EN to VIN (>1.5V), to turn on the converter. Short pins 2-3, connecting EN to GND, to turn off the converter.</p> <p class="MsoNormal">3.Verify the output voltage (approximately 1.2V) between VOUT and GND.</p> <p class="MsoNormal">4.Connect an external load up to 600mA 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 href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image002.gif" class="fancybox"></a></p> <a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image002.gif" class="fancybox"> </a> <p><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image002.gif" class="fancybox"></a><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image002.gif" class="fancybox"><img id="圖片 14" style="border-width: 0px; border-style: solid; width: 161px; height: 42px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image002_en.gif" /></a></p> <p class="MsoNormal">The installed VOUT capacitor (C4) is a 10μF, 6.3V X5R ceramic type. For higher output voltages, consider its 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 RT8008 IC datasheet.</p>

6. Schematic, Bill of Materials and Board Layout

<h3>EVB Schematic Diagram</h3> <p class="MsoNormal"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image003.gif" class="fancybox"><img id="圖片 2" style="border-width: 0px; border-style: solid; height: 197px; width: 681px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image003_en.gif" height="197" width="681" /></a></p> <p class="MsoNormal">C3: 4.7μF/6.3V/X5R, 0603, TDK C2012X5R0J475M </p> <p class="MsoNormal">C4: 10μF/6.3V/X5R, 0805, TDK C2012X5R0J106M</p> <p class="MsoNormal">L1: 2.2μH TAIYO YUDEN NR3015T2R2M, DCR=60mΩ</p> <h3>Bill of Materials</h3> <div> <table class="MsoNormalTable" style="border: currentColor; width: 510.2pt; border-collapse: collapse;" cellpadding="0" cellspacing="0" border="1" width="680"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 1.4pt; border: 1pt solid #009eb8; width: 77.15pt; 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 1.4pt; width: 18.95pt; 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 1.4pt; width: 107.8pt; 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 1.4pt; width: 110pt; 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 1.4pt; width: 79.35pt; 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 1.4pt; width: 66.45pt; height: 17pt;"> <p class="MsoNormal">Manufacture</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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">U1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> <p class="MsoNormal">RT8008GB</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <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 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">SOT-23-5</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 66.45pt; height: 17pt;"> <p class="MsoNormal">Richtek</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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">C1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> <p class="MsoNormal">0603B220K500NT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">22pF/±10%50V/X7R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">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 1.4pt; width: 66.45pt; height: 17pt;"> <p class="MsoNormal">WALSIN</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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">C2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <p class="MsoNormal">0</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 107.8pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">Not Installed</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">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 1.4pt; width: 66.45pt; height: 17pt;"> </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 1.4pt; width: 77.15pt; height: 17pt;"> <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 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> <p class="MsoNormal">C2012X5R0J475M</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">4.7μF/±20%/6.3V/X5R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">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 1.4pt; width: 66.45pt; height: 17pt;"> <p class="MsoNormal">TDK</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 1.4pt; width: 77.15pt; height: 17pt;"> <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 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> <p class="MsoNormal">C2012X5R0J106M</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">10μF/±20%/6.3V/X5R</p> <p class="MsoNormal">Ceramic Capacitor</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">0805</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 66.45pt; height: 17pt;"> <p class="MsoNormal">TDK</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 1.4pt; width: 77.15pt; height: 17pt;"> <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 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> <p class="MsoNormal">NR3015T2R2M</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">2.2μH/1.5A/±20%, DCR=60mΩ, Inductor</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">3mmx3mmx1.5mm</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 66.45pt; height: 17pt;"> <p class="MsoNormal">TAIYO YUDEN</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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">R1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">120kΩ/±1%, Resistor</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">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 1.4pt; width: 66.45pt; height: 17pt;"> </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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">R2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt; white-space: nowrap;"> <p class="MsoNormal">120kΩ/±1%, Resistor</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> <p class="MsoNormal">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 1.4pt; width: 66.45pt; height: 17pt;"> </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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">J1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt; white-space: nowrap;"> <p class="MsoNormal">3-Pin Header</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 66.45pt; height: 17pt;"> </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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">TP</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <p class="MsoNormal">3</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 107.8pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">Test Pin</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 66.45pt; height: 17pt;"> </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 1.4pt; width: 77.15pt; height: 17pt;"> <p class="MsoNormal">GP</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 18.95pt; height: 17pt;"> <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 1.4pt; width: 107.8pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 110pt; height: 17pt;"> <p class="MsoNormal">Golden Pin</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 79.35pt; height: 17pt;"> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 1.4pt; width: 66.45pt; height: 17pt;"> </td> </tr> </tbody> </table> </div>

7. EVB Layout

<p class="1CxSpFirst"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image004.gif" class="fancybox"><img id="圖片 4" style="border-width: 0px; border-style: solid; height: 317px; width: 441px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image004_en.gif" height="317" width="441" /></a></p> <p class="1CxSpMiddle">Top View (1^stlayer)</p> <p class="1CxSpMiddle"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image005.gif" class="fancybox"><img id="圖片 5" style="border-width: 0px; border-style: solid; height: 317px; width: 441px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image005_en.gif" height="317" width="441" /></a></p> <p class="1CxSpLast">Bottom View (2^nd Layer)</p> <p class="1CxSpFirst"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image006.gif" class="fancybox"><img id="圖片 6" style="border-width: 0px; border-style: solid; height: 320px; width: 445px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image006_en.gif" height="320" width="445" /></a></p> <p class="1CxSpMiddle">Component Placement Guide—Component Side (1^stlayer)</p> <p class="1CxSpMiddle"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image007.gif" class="fancybox"><img id="圖片 7" style="border-width: 0px; border-style: solid; height: 326px; width: 445px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image007_en.gif" height="326" width="445" /></a></p> <p class="1CxSpMiddle">PCB Layout—Component Side (1^stLayer)</p> <p class="1CxSpMiddle"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image008.gif" class="fancybox"><img id="圖片 8" style="border-width: 0px; border-style: solid; height: 320px; width: 445px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image008_en.gif" height="320" width="445" /></a></p> <p class="1CxSpMiddle">Component Placement Guide—Bottom Side (2^nd Layer)</p> <p class="1CxSpMiddle"><a href="~/media/Richtek/Design%20Support/Technical%20Documentation/UG8008GB/EN/Version1/image009.gif" class="fancybox"><img id="圖片 9" style="border-width: 0px; border-style: solid; height: 317px; width: 445px;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt8008gb/html-images/image009_en.gif" height="317" width="445" /></a></p> <p class="1CxSpLast">PCB Layout—Bottom Side (2^nd layer)</p>