overview

1. Purpose

<p class="MsoNormal">The RT4805A is a Boost converter with the input voltage range from 1.8V to 5V and provides 2A output current. This document explains the function and use of the RT4805A evaluation board (EVB), and provides information to enable operation, output voltage setting of the evaluation board.</p>

2. Introduction

<h3>General Product Information</h3> <p class="bady">The RT4805A allows systems to take advantage of new battery chemistries that can supply significant energy when the battery voltage is lower than the required voltage for system power ICs. By combining built-in power transistors, synchronous rectification, and low supply current; this IC provides a compact solution for systems using advanced Li-Ion battery chemistries. </p> <p class="bady">The RT4805A is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below system minimum. In boost mode, output voltage regulation is guaranteed to a maximum load current of 2A. Quiescent current in Shutdown Mode is less than 1µA, which maximizes battery life. The regulator transitions smoothly between Bypass and normal Boost Mode. The device can be forced into Bypass Mode to reduce quiescent current. The RT4805A is available in the WL-CSP-16B 1.67x1.67 (BSC) package. </p> <h3>Product Feature</h3> <ul> <li> 4 Few External Components : 0.47μH Inductor and 0603 Case Size Input and Output Capacitors </li> <li> Input Voltage Range : 1.8V to 5V </li> <li> Output Range from 2.85V to 4.4V </li> <li> VSEL = L 3.6V </li> <li> VSEL = H 3.7V </li> <li> Maximum Continuous Load Current : 2A at V_IN > 2.65V Boosting V_OUT to 3.35V </li> <li> Up to 96% Efficient </li> <li> True Bypass Operation when V_IN > Target V_OUT </li> <li> Internal Synchronous Rectifier </li> <li> True Load Disconnectwhen Shut Down </li> <li> Forced Bypass Mode </li> <li> V_SEL Control to Optimize Target V_OUT </li> <li> Short-Circuit Protection </li> <li> I²C Controlled Interface </li> <li> Ultra low Operating Quiescent Current </li> <li> Small WL-CSP 16B Package </li> </ul> <h3>Key Performance Summary Table</h3> <table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="850" style="width:510.2pt;border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td width="34%" style="width:34.94%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">Key Features</p> </td> <td width="65%" style="width:65.06%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">Evaluation Board Number : PCB089_V1</p> </td> </tr> <tr style="height:17.0pt"> <td width="34%" style="width:34.94%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">Default Input Voltage</p> </td> <td width="65%" style="width:65.06%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">3.0V</p> </td> </tr> <tr style="height:17.0pt"> <td width="34%" style="width:34.94%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">Max Output Current</p> </td> <td width="65%" style="width:65.06%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">2A</p> </td> </tr> <tr style="height:17.0pt"> <td width="34%" style="width:34.94%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">Default Output Voltage</p> </td> <td width="65%" style="width:65.06%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">Vout_H = 3.7V, Vout_L = 3.6V</p> </td> </tr> <tr style="height:17.0pt"> <td width="34%" style="width:34.94%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">Default Marking & Package Type</p> </td> <td width="65%" style="width:65.06%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">WL-CSP-16B 1.67x1.67 (BSC)</p> </td> </tr> </table>

3. 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_rt4805awsc/html-images/image001_en.png"><img width="472" height="295" id="圖片 12" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image001_en.png" alt="Technical Document Image Preview" /></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>

4. Test Points

<p class="MsoNormal">The EVB is provided with the test points and pin names listed in the table below.</p> <table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="850" style="width:510.2pt;border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="23CxSpFirst">Test point/</p> <p class="23CxSpMiddle">Pin name</p> </td> <td width="23%" style="width:23.7%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="23CxSpMiddle">Signal</p> </td> <td width="62%" style="width:62.4%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="23CxSpLast">Comment (expected waveforms or voltage levels on test points)</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">VIN</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">Input voltage</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Input voltage with range 1.8V to 5V.</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1">EN</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">V_OUT Enable</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Enable control pin for VOUT.</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1">LX</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Switching Node</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Switching Node.</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">PGND/AGND</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpMiddle">Ground</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">Ground.</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">SDA/SCL</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpMiddle">I2C Control</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">Pins to set functions such as VOUT, ILIM.</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpFirst">VOUT</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="ListParagraph1CxSpLast">Output Voltage</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Default voltage : 5V ± 2%.</p> </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="ListParagraph1">PGOOD</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="MsoNormal">Power Good</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="Default">Power Good. It is a open-drain output. PGOOD pin pulls low automatically if the overload or OTP event occurs. </p> </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="ListParagraph1">VSEL</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="MsoNormal">V_OUT Select GPIO</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="Default">Output Voltage Select. When boost is running, this pin can be used to select output voltage. </p> </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.9%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="ListParagraph1">nBYP</p> </td> <td width="23%" style="width:23.7%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="MsoNormal">Inverse Bypass Signal</p> </td> <td width="62%" style="width:62.4%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> <p class="Default">Bypass. This pin can be used to activate Forced Bypass Mode. When this pin is LOW, the bypass switches are turned on and the IC is otherwise inactive. </p> </td> </tr> </table>

5. Power-up & Measurement Procedure

<p class="MsoListParagraph">1. Connect input voltage (1.8V < V_IN < 5.0V).</p> <p class="MsoListParagraph">2. To use a switch at “H” option to tie EN pin to input voltage VIN via SW1 or external voltage for enabling the device. Inversely, to use a jumper at “L” option to tie EN pin to ground GND for disabling the device.</p> <p class="MsoListParagraph">3. To verify the output voltage V_OUT via the I2C interface.</p> <p class="MsoListParagraph">4. To connect an external load up to 1A and verify the output voltage and current.</p>

6. I2C Register Setting

<p class="MsoNormal">The register as the table shown can be programmed by a MCU through the dedicated I2C interface. The device slave address is 0x39.</p> <p class="MsoNormal"><a name="_Toc409666845"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image003_en.jpg"><img border="0" width="850" height="617" id="圖片 1" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image003_en.jpg" alt="Technical Document Image Preview" /></a></a></p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image004_en.jpg"><img border="0" width="850" height="328" id="圖片 3" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image004_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image005_en.jpg"><img border="0" width="850" height="325" id="圖片 6" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image005_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image006_en.jpg"><img border="0" width="850" height="474" id="圖片 8" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image006_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image007_en.jpg"><img border="0" width="850" height="549" id="圖片 9" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image007_en.jpg" alt="Technical Document Image Preview" /></a></p>

7. Schematic, Bill of Materials & Board Layout

<h3>EVB Schematic Diagram </h3> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image008_en.jpg"><img border="0" width="851" height="635" id="圖片 7" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image008_en.jpg" alt="Technical Document Image Preview" /></a></p>

8. Bill of Materials

<table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="851" style="border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td width="13%" style="width:13.26%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Reference</p> </td> <td width="6%" style="width:6.18%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Qty</p> </td> <td width="23%" style="width:23.04%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Part number</p> </td> <td width="20%" style="width:20.56%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Description</p> </td> <td width="21%" style="width:21.92%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Package</p> </td> <td width="15%" style="width:15.04%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Manufacture</p> </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.26%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">U1</p> </td> <td width="6%" style="width:6.18%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">1</p> </td> <td width="23%" style="width:23.04%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">RT4805AWSC</p> </td> <td width="20%" style="width:20.56%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Boost Converter</p> </td> <td width="21%" style="width:21.92%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">WL-CSP-16B 1.67x1.67</p> </td> <td width="15%" style="width:15.04%;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <p class="MsoNormal">Richtek</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal"><a name="_Toc409666848">C1</a></p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">GRM32ER61A107ME20L</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">100μF/10V/X5R/1210</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C-1210</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C2</p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">GRM188R61H105KAAL</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1.0μF/50V/X7R/0603</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C-0603</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C3</p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">EMK212ABJ106KG</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">10μF/16V/X7R/0805</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C-0805</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">Taiyo</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C4, C5</p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">2</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">LMK212BBJ226MG</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">22μF/6.3V/X7R/0805</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">C-0805</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">Taiyo</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">L1</p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">DFE2520F-R47M</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">0.47μH</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">L-2520</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">TOKO</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">R1</p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">PFR05105FNH</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1MΩ/0402/1%</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">R-0402</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">乾坤</p> </td> </tr> <tr style="height:15.6pt"> <td width="13%" nowrap valign="top" style="width:13.26%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">R2, R3</p> </td> <td width="6%" nowrap valign="top" style="width:6.18%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">2</p> </td> <td width="23%" nowrap valign="top" style="width:23.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">PFR05102FNH</p> </td> <td width="20%" nowrap valign="top" style="width:20.56%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">1kΩ/0402/1%</p> </td> <td width="21%" nowrap valign="top" style="width:21.92%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">R-0402</p> </td> <td width="15%" nowrap valign="top" style="width:15.04%;border-top:none; border-left:none;border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 5.4pt 0cm 5.4pt;height:15.6pt"> <p class="MsoNormal">乾坤</p> </td> </tr> </table>

9. PCB Layout

<p class="23CxSpFirst"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image009_en.jpg"><img border="0" width="472" height="296" id="圖片 2" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image009_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="23CxSpMiddle">Top View (1^st layer)</p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image010_en.jpg"><img border="0" width="472" height="296" id="圖片 4" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image010_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="10">PCB Layout—Inner Side (2^nd Layer)</p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image011_en.jpg"><img border="0" width="472" height="297" id="圖片 5" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image011_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="10">PCB Layout—Inner Side (3^rd Layer)</p> <p class="MsoNormal"><a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image012_en.jpg"><img border="0" width="472" height="297" id="圖片 10" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt4805awsc/html-images/image012_en.jpg" alt="Technical Document Image Preview" /></a></p> <p class="10">Bottom View (4^th Layer)</p>