Name: EVB_RTQ2131BGQW-QA
Brand: Richtek

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The Evaluation Board demonstrates the RTQ2131B to be designed for a 5V/1.0A output from a 7V to 25V input at 2.1MHz switching frequency. The RTQ2131B can apply to other output voltages by changing the resistive divider for input voltages support up to 36V. For more application circuits, please refer to the RTQ2131B datasheet. The wide input range makes it suitable for automotive systems and car camera module. The RTQ2131B provides complete protection functions such as input under-voltage lockout, output under-voltage protection, over-current protection, and thermal shutdown. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up.

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1. General Description

The Evaluation Board demonstrates the RTQ2131B to be designed for a 5V/1.0A output from a 7V to 25V input at 2.1MHz switching frequency. The RTQ2131B can apply to other output voltages by changing the resistive divider for input voltages support up to 36V. For more application circuits, please refer to the RTQ2131B datasheet. The wide input range makes it suitable for automotive systems and car camera module. The RTQ2131B provides complete protection functions such as input under-voltage lockout, output under-voltage protection, over-current protection, and thermal shutdown. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up.

2. Performance Sepcification Summary

Summary of the RTQ2131B Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C. Table 1. RTQ2131BGQW Evaluation Board Performance Specification Summary <div> <table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="0" style="width:510.2pt;border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Specification </td> <td width="271" style="width:203.4pt;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Test Conditions </td> <td style="border:solid #009EB8 1.0pt;border-left:none;background:#009EB8; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Min </td> <td style="border:solid #009EB8 1.0pt;border-left:none;background:#009EB8; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Typ </td> <td style="border:solid #009EB8 1.0pt;border-left:none;background:#009EB8; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Max </td> <td style="border:solid #009EB8 1.0pt;border-left:none;background:#009EB8; padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Unit </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Input Voltage Range </td> <td width="271" style="width:203.4pt;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"> VOUT = 5V </td> <td style="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"> 7 </td> <td style="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"> -- </td> <td style="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"> 25 </td> <td style="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"> V </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Output Current </td> <td width="271" style="width:203.4pt;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"> </td> <td style="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"> 0 </td> <td style="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"> -- </td> <td style="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"> 1 </td> <td style="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"> A </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Default Output Voltage </td> <td width="271" style="width:203.4pt;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"> </td> <td style="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"> -- </td> <td style="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"> 5 </td> <td style="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"> -- </td> <td style="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"> V </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Operation Frequency </td> <td width="271" style="width:203.4pt;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"> </td> <td style="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"> -- </td> <td style="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"> 2100 </td> <td style="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"> -- </td> <td style="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"> kHz </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Output Ripple Voltage </td> <td width="271" style="width:203.4pt;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"> IOUT = 1A </td> <td style="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"> -- </td> <td style="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"> 10 </td> <td style="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"> -- </td> <td style="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"> mVp-p </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Line Regulation </td> <td width="271" style="width:203.4pt;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"> IOUT = 1A, VIN = 7V to 25V </td> <td style="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"> -- </td> <td style="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"> ±1 </td> <td style="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"> -- </td> <td style="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"> % </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Load Regulation </td> <td width="271" style="width:203.4pt;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"> VIN = 12V, IOUT = 0.001 A to 1A </td> <td style="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"> -- </td> <td style="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"> ±1 </td> <td style="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"> -- </td> <td style="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"> % </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Load Transient Response </td> <td width="271" style="width:203.4pt;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"> IOUT = 0A to 1A </td> <td style="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"> -- </td> <td style="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"> ±5 </td> <td style="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"> -- </td> <td style="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"> % </td> </tr> <tr style="height:17.0pt"> <td width="198" style="width:148.6pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Maximum Efficiency </td> <td width="271" style="width:203.4pt;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"> VIN = 12V, VOUT = 5V, IOUT = 1A </td> <td style="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"> -- </td> <td style="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"> 89.3 </td> <td style="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"> -- </td> <td style="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"> % </td> </tr> </table> </div>

3. Power-up Procedure

<h3>Suggestion Required Equipments</h3> <ul> <li>RTQ2131B Evaluation Board </li> <li>DC power supply capable of at least 36V and 1A</li> <li>Electronic load capable of 6A</li> <li>Function Generator</li> <li>Oscilloscope</li> </ul>

4. Quick Start Procedures

The Evaluation Board is fully assembled and tested. Follow the steps below to verify board operation. Caution : Do not turn on supplies until all connections are made. Note: When measuring the output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor. Proper measurement equipment setup and follow the procedure below. 1) With power off, connect the input power supply to VIN and GND pins. 2) With power off, connect the electronic load between the VOUT and nearest GND pins. 3) Turn on the power supply at the input. Make sure that the input voltage does not exceeds 36V on the Evaluation Board. 4) Check for the proper output voltage using a voltmeter. 5) Once the proper output voltage is established, adjust the load within the operating ranges and observe the output voltage regulation, ripple voltage, efficiency and other performance.

5. Detailed Description of Hardware

<h3>Headers Description and Placement</h3> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image001_en.jpg"><img width="453" height="329" id="圖片 3" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image001_en.jpg" alt="Technical Document Image Preview" /></a> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image002_en.jpg"><img width="453" height="328" id="圖片 8" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image002_en.jpg" alt="Technical Document Image Preview" /></a> 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>.

6. Test Points

The EVB is provided with the test points and pin names listed in the table below. <table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="0" style="width:510.2pt;margin-left:1.85pt;border-collapse:collapse; border:none"> <thead> <tr style="height:1.0cm"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> Test Point/ Pin Name </td> <td width="79%" style="width:79.4%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> Function </td> </tr> </thead> <tr style="height:1.0cm"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> VIN </td> <td width="79%" style="width:79.4%;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"> Input voltage positive connection. The power supply must be connected to input connectors, VIN and GND. </td> </tr> <tr style="height:17.0pt"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> EN </td> <td width="79%" style="width:79.4%;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"> Enable test point. The test point can be used to measure the enable signal. </td> </tr> <tr style="height:1.0cm"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> VOUT </td> <td width="79%" style="width:79.4%;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"> Output voltage connection. The load must be connected to output connectors, VOUT and GND. </td> </tr> <tr style="height:17.0pt"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> JP1 </td> <td width="79%" style="width:79.4%;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"> EN jumper. Connect EN to ground to disable, connect EN to logic high to enable. </td> </tr> <tr style="height:1.0cm"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> PG </td> <td width="79%" style="width:79.4%;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"> Power-good indication test point. The test point can be used to measure the power-good singal. </td> </tr> <tr style="height:17.0pt"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> GND </td> <td width="79%" style="width:79.4%;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"> Ground. Input/Output voltage return connection. </td> </tr> <tr style="height:17.0pt"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> BOOT </td> <td width="79%" style="width:79.4%;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"> Bootstrap node test point. The test point can be used to measure the bootstrap voltage. </td> </tr> <tr style="height:17.0pt"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> SW </td> <td width="79%" style="width:79.4%;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"> Switch node test point. The test point can be used to measure the switching node. </td> </tr> <tr style="height:17.0pt"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> VIN_EMI </td> <td width="79%" style="width:79.4%;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"> Input voltage node before EMI solution. Optional for EMI requirement. </td> </tr> <tr style="height:1.0cm"> <td width="20%" style="width:20.6%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> VCC </td> <td width="79%" style="width:79.4%;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"> Linear regulator output test point. The test point can be used to measure the output node of the internal regulator. </td> </tr> </table>

7. Bill of Materials

<div> <table class="TableNormal" border="1" cellspacing="0" cellpadding="0" width="0" style="border-collapse:collapse;border:none"> <thead> <tr style="height:17.0pt"> <td width="680" colspan="7" style="width:510.2pt;border:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> VIN = 12V, VOUT = 5V, IOUT = 1A, fSW = 2100kHz </td> </tr> <tr style="height:17.0pt"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top: none;background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Reference </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Count </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Part Number </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Value </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Description </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Package </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 0cm 0cm 0cm;height:17.0pt"> Manufacturer </td> </tr> </thead> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> U1 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> RTQ2131BGQW-QA </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> RTQ2131B </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Step-Down Converter </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WDFN-10SL 3x3 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> RICHTEK </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> C1, C2, C3, C4, C16 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 5 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> N/A </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Optional for EMI requirement </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> C5 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> GCM31CR71H225KA </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 2.2µF </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Capacitor, ceramic, 50V, X7R, ±10% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 1206 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> MURATA </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> C6, C7, C8 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 3 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> CGA3E2X7R1H104K </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 0.1µF </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Capacitor, ceramic, 50V, X7R, ±10% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> TDK </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> C9, C10 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 2 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> GCM31CC71E106KA </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 10µF </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Capacitor, ceramic, 25V, X7S, ±10% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 1206 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> MURATA </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> C11 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> GCM188R71C105KA </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1µF </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Capacitor, ceramic, 16V, X7R, ±10% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> MURATA </td> </tr> <tr style="height:17.0pt"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:17.0pt"> C12 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:17.0pt"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> N/A </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:17.0pt"> N/A </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> Optional </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> N/A </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> N/A </td> </tr> <tr style="height:17.0pt"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:17.0pt"> C13 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:17.0pt"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> N/A </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:17.0pt"> N/A </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> Optional </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> N/A </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:17.0pt"> N/A </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> C15 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> GCE188R71H152KA </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1.5nF </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Capacitor, ceramic, 50V, X7R, ±10% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> L1, L2 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 2 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> N/A </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Optional for EMI requirement </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> N/A </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> L3 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WE-74437336047 </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 4.7µH </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Inductor, SMT, Isat = 5.9A, 50mΩ </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 5.2 x 5.2 x 2.8mm </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Wurth Elektronik </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> R2, R4 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 2 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WR06X1003 </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 100kΩ </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Resistor, chip, 1/10W, 1% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> R3 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WR06X1053 </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 105k </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Resistor, chip, 1/10W, 1% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> R5 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WR06X2002 </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 20k </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Resistor, chip, 1/10W, 1% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="71" style="width:52.95pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 0cm 0cm 0cm;height:1.0cm"> R6 </td> <td width="38" style="width:28.7pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 1 </td> <td width="157" style="width:117.5pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WR06X3742 </td> <td width="89" style="width:66.4pt;border-top:none;border-left:none;border-bottom: solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt;padding:0cm 0cm 0cm 0cm; height:1.0cm"> 37.4k </td> <td width="124" style="width:92.85pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> Resistor, chip, 1/10W, 1% </td> <td width="112" style="width:83.75pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> 0603 </td> <td width="91" style="width:68.05pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 0cm 0cm 0cm;height:1.0cm"> WALSIN </td> </tr> </table> </div>

8. Typical Applications

<h3>EVB Schematic Diagram</h3> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image003_en.jpg"><img border="0" width="684" height="386" id="圖片 5" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image003_en.jpg" alt="Technical Document Image Preview" /></a> 1. The capacitance values of the input and output capacitors will influence the input and output voltage ripple. 2. MLCC capacitors have degrading capacitance at DC bias voltage, and especially smaller size MLCC capacitors will have much lower capacitance.

9. Measure Result

<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" style="margin-left:26.35pt;border-collapse:collapse;border:none"> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Output Ripple Measurement </td> <td width="307" style="width:230.35pt;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Load Transient Response </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image004_en.png"><img border="0" width="292" height="203" id="圖片 36" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image004_en.png" alt="Technical Document Image Preview" /></a> </td> <td width="307" style="width:230.35pt;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"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image005_en.png"><img border="0" width="293" height="206" id="圖片 6" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image005_en.png" alt="Technical Document Image Preview" /></a> </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Power On from EN </td> <td width="307" style="width:230.35pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Power Off from EN </td> </tr> <tr style="height:163.9pt"> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:163.9pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image006_en.png"><img border="0" width="292" height="214" id="圖片 32" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image006_en.png" alt="Technical Document Image Preview" /></a> </td> <td width="307" style="width:230.35pt;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:163.9pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image007_en.png"><img border="0" width="292" height="215" id="圖片 33" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image007_en.png" alt="Technical Document Image Preview" /></a> </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt"> Soft-start time = 1.7ms </td> <td width="307" style="width:230.35pt;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"> </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Short Circuit Response – Short and Recovery </td> <td width="307" style="width:230.35pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Strating Progile III (Cold cranking) </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 1.4pt 0cm 1.4pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image008_en.png"><img border="0" width="292" height="224" id="圖片 34" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image008_en.png" alt="Technical Document Image Preview" /></a> </td> <td width="307" style="width:230.35pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 1.4pt 0cm 1.4pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image009_en.png"><img border="0" width="291" height="227" id="圖片 35" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image009_en.png" alt="Technical Document Image Preview" /></a> </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Efficiency vs. Output Current </td> <td width="307" style="width:230.35pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Output Voltage vs. Output Current </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 1.4pt 0cm 1.4pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image010_en.jpg"><img border="0" width="303" height="244" id="圖片 38" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image010_en.jpg" alt="Technical Document Image Preview" /></a> </td> <td width="307" style="width:230.35pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; padding:0cm 1.4pt 0cm 1.4pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image011_en.jpg"><img border="0" width="303" height="238" id="圖片 39" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image011_en.jpg" alt="Technical Document Image Preview" /></a> </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Output Voltage vs. Input Voltage </td> <td width="307" style="width:230.35pt;border-top:none;border-left:none; border-bottom:solid #009EB8 1.0pt;border-right:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> </td> </tr> <tr> <td width="307" style="width:229.8pt;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image012_en.jpg"><img border="0" width="292" height="227" id="圖片 40" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image012_en.jpg" alt="Technical Document Image Preview" /></a> </td> <td width="307" style="width:230.35pt;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"> </td> </tr> </table> Note : When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the output capacitor.

10. Evaluation Board Layout

Figure 1 to Figure 4 are RTQ2131B Evaluation Board layout. This board size is 110mm x 80mm and is constructed on four-layer PCB with 1 OZ. Cu on the outer layers and 1 OZ. Cu in the inner layers. <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image013_en.jpg"><img border="0" width="492" height="355" id="圖片 1" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image013_en.jpg" alt="Technical Document Image Preview" /></a> Figure 1. Top View (1st layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image014_en.jpg"><img border="0" width="492" height="355" id="圖片 9" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image014_en.jpg" alt="Technical Document Image Preview" /></a> Figure 2. PCB Layout—Inner Side (2nd Layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image015_en.jpg"><img border="0" width="492" height="357" id="圖片 10" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image015_en.jpg" alt="Technical Document Image Preview" /></a> Figure 3. PCB Layout—Inner Side (3rd Layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image016_en.jpg"><img border="0" width="491" height="356" id="圖片 4" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2131bgqw-qa/html-images/image016_en.jpg" alt="Technical Document Image Preview" /></a> Figure 4. Bottom View (4th Layer)

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