Name: EVB_RTQ2159GQWTF-QA
Brand: Richtek

1rem

rt-dark-800

headline-3

false

true

basicInfoTitle

left

buttonDownload

text-with-icon

secondary

i18n(button-item.download.button-label)

i18n(button-item.download.button-link)

_self

false

buttonContactUs

text-with-icon

secondary

i18n(button-item.contact-us.button-label)

i18n(button-item.contact-us.button-link)

_self

false

rt-dark-800

basicInfoSubtitle

width

fixed-width

altText

Product Spec Banner

backgroundColor

FFFFFF

basicInfoSection

basicInfoImageSwitcher

RTQ2159 为高性能同步降压转换器，可在 2.85V 至 6.5V 的输入电压范围内提供最高 8A 输出电流。本文档介绍 RTQ2159 开发板（EVB）的功能与使用方法，并提供开发板操作、修改、物料清单（BOM）及电路原理图等相关信息，以满足不同应用需求。

EVB_RTQ2159GQWTF-QA

width

fixed-width

basicInfoImageSection

anchor

overviewSection

i18n(anchor-tab.overview-section.title)

overviewSectionAnchorTab

designResourceSection

i18n(anchor-tab.design-resource-section.title)

designResourceSectionAnchorTab

relatedProductSection

i18n(anchor-tab.related-product-section.title)

relatedProductSectionAnchorTab

orderingInformationSection

i18n(anchor-tab.ordering-information-section.title)

orderingInformationSectionAnchorTab

width

full-width

anchorSection

overview

1. Purpose

The RTQ2159 is a high-performance, synchronous step-down converter that can deliver up to 8A output current with an input supply voltage range of 2.85V to 6.5V. This document explains the function and use of the RTQ2159 evaluation board (EVB), and provides information to enable operation, modification of the evaluation board, bill of materials and schematic to meet individual requirements.

2. Performance Sepcification Summary

Summary of the RTQ2159 Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C. Table 1. RTQ2159 Evaluation Board Performance Specification Summary <div> <table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="680" style="width:510.2pt;border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td style="border:solid #009EB8 1.0pt;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Specification </td> <td style="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 style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Input Voltage Range </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"> 2.85 </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"> 6.5 </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"> V </td> </tr> <tr style="height:17.0pt"> <td style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Output Current </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> <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"> 8 </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"> A </td> </tr> <tr style="height:17.0pt"> <td style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Default Output Voltage </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> <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"> V </td> </tr> <tr style="height:17.0pt"> <td rowspan="2" style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Operation Frequency Output Ripple Voltage </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> <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"> 460 </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 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"> IOUT = 8A </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 style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Line Regulation </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"> IOUT = 8A, VIN = 3V to 6.5V </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"> -- </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 style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Load Regulation </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"> VIN = 5V, IOUT = 0A to 8A </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 style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Load Transient Response </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"> IOUT = 0A to 8A </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 style="border:solid #009EB8 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt; height:17.0pt"> Maximum Efficiency </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"> VIN = 5V, VOUT = 1.2V, IOUT = 8A </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"> 77 </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 Equipment</h3> <ul> <li>RTQ2159GQWT-QA Evaluation Board </li> <li>DC power supply capable of 10A</li> <li>Electronic load capable of 12A</li> <li>Function Generator</li> <li>Oscilloscope</li> </ul>

4. Quick Start Procedure

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.

5. Proper measurement equipment setup and follow the procedure below.

1. Turn off the power and connect the input power supply to the VIN and GND pins. 2. Turn off the power and connect the electronic load between the VOUT and the nearest GND pins. 3. Turn on the power supply at the input, ensuring that the input voltage does not exceed 5V on the Evaluation Board. 4. Use a voltmeter to check for the proper output voltage. 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 metrics.

6. Detailed Description of Hardware

<h3>Headers Description and Placement</h3> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image001_en.jpg"><img width="491" height="360" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image001_en.jpg" alt="一張含有文字, 電路, 電子工程, 電子產品的圖片自動產生的描述" /></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>.

7. Enable

To automatically start, pull the EN pin to VIN through JP2. Similarly, the converter can be shut down by shorting the EN pin to GND through JP2.

8. 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="680" style="width:510.0pt;border-collapse:collapse;border:none"> <thead> <tr style="height:1.0cm"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> Test Point/ Pin Name </td> <td width="83%" style="width:83.16%;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:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> EN </td> <td width="83%" style="width:83.16%;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 control input. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> BOOT </td> <td width="83%" style="width:83.16%;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"> Supply for high-side gate driver. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> SW </td> <td width="83%" style="width:83.16%;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. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> PGND </td> <td width="83%" style="width:83.16%;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"> System GND. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> VIN </td> <td width="83%" style="width:83.16%;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"> Support 2.85V to 6.5V input voltage. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> AVCC </td> <td width="83%" style="width:83.16%;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"> Internal regulator output. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> AGND </td> <td width="83%" style="width:83.16%;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"> Signal ground. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> PGOOD </td> <td width="83%" style="width:83.16%;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"> Open-drain, power-good indication output. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> SS </td> <td width="83%" style="width:83.16%;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"> Soft-start time control pin. </td> </tr> <tr style="height:17.0pt"> <td width="16%" style="width:16.84%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> FB </td> <td width="83%" style="width:83.16%;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"> Feedback input. </td> </tr> </table>

9. Bill of Materials

<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" width="680" style="margin-left:-.75pt;border-collapse:collapse;border:none"> <thead> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> Reference </td> <td width="42" nowrap style="width:31.5pt;border:solid #009EB8 1.0pt; border-left:none;background:#009EB8;padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> Count </td> <td width="169" nowrap style="width:126.7pt;border:solid #009EB8 1.0pt; border-left:none;background:#009EB8;padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> Part Number </td> <td width="123" nowrap style="width:92.35pt;border:solid #009EB8 1.0pt; border-left:none;background:#009EB8;padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> Description </td> <td width="134" style="width:100.8pt;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> Package </td> <td width="94" nowrap style="width:70.85pt;border:solid #009EB8 1.0pt; border-left:none;background:#009EB8;padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> Manufacturer </td> </tr> </thead> <tr style="height:1.0cm"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:1.0cm"> U1 </td> <td width="42" nowrap style="width:31.5pt;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;height:1.0cm"> 1 </td> <td width="169" nowrap style="width:126.7pt;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;height:1.0cm"> RTQ2159GQWTF-QA </td> <td width="123" nowrap style="width:92.35pt;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;height:1.0cm"> Step-Down DC-DC Converter </td> <td width="134" style="width:100.8pt;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;height:1.0cm"> WET-WQFN-21L 4x4 (FC) </td> <td width="94" nowrap style="width:70.85pt;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;height:1.0cm"> RICHTEK </td> </tr> <tr style="height:1.0cm"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:1.0cm"> C1, C2, C9, C10, C11, C12 </td> <td width="42" nowrap style="width:31.5pt;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;height:1.0cm"> 6 </td> <td width="169" nowrap style="width:126.7pt;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;height:1.0cm"> GRM187R61A226ME15 </td> <td width="123" nowrap style="width:92.35pt;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;height:1.0cm"> 22µF/10V/X5R </td> <td width="134" style="width:100.8pt;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;height:1.0cm"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:1.0cm"> MURATA </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> C3, C5, C8 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 3 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> 0603B104K500CT </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 100nF/50V/X7R </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> WALSIN </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> C4 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 1 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> GRM188R61E475KE11D </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 4.7µF/10V/X5R </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> MURATA </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> L1 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 1 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> 744316022 </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 0.22µH </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 5040 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> WE </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> R1, R2 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 2 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> WR06X1003FTL </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 100k </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> WALSIN </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> R3 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 1 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> WR06X20R0FTL </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 20 </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> WALSIN </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> R5, R6, R7 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 3 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> RAT030000FTP </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 0 </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> RALEC </td> </tr> <tr style="height:17.0pt"> <td width="117" style="width:88.0pt;border:solid #009EB8 1.0pt;border-top:none; padding:0cm 1.4pt 0cm 1.4pt;height:17.0pt"> R8 </td> <td width="42" nowrap style="width:31.5pt;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;height:17.0pt"> 1 </td> <td width="169" nowrap style="width:126.7pt;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;height:17.0pt"> WR06X2002FTL </td> <td width="123" nowrap style="width:92.35pt;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;height:17.0pt"> 20k </td> <td width="134" style="width:100.8pt;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;height:17.0pt"> 0603 </td> <td width="94" nowrap style="width:70.85pt;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;height:17.0pt"> WALSIN </td> </tr> </table>

10. Typical Applications

<h3>EVB Schematic Diagram</h3> RTQ2159GQWTF-QA demo board: VIN = 5V, VOUT 1V / 8A <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image002_en.png"><img border="0" width="681" height="352" id="Picture 3" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image002_en.png" 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.

11. Measurement Results

<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" style="margin-left:5.4pt;border-collapse:collapse;border:none"> <tr> <td width="334" valign="top" style="width:250.75pt;border:solid #009EB8 1.0pt; background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Output Ripple Measurement at VIN = 5V 8A load, VOUT = 1V </td> <td width="337" valign="top" style="width:252.5pt;border:solid #009EB8 1.0pt; border-left:none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Output Ripple Measurement at VIN = 5V 8A load, VOUT = 2.5V </td> </tr> <tr> <td width="334" valign="top" style="width:250.75pt;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_rtq2159gqwtf-qa/html-images/image003_en.jpg"><img border="0" width="310" height="222" id="圖片 7" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image003_en.jpg" alt="Technical Document Image Preview" /></a> </td> <td width="337" valign="top" style="width:252.5pt;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_rtq2159gqwtf-qa/html-images/image004_en.jpg"><img border="0" width="311" height="222" id="圖片 10" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image004_en.jpg" alt="Technical Document Image Preview" /></a> </td> </tr> <tr> <td width="334" valign="top" style="width:250.75pt;border:solid #009EB8 1.0pt; border-top:none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Dynamic Load 0A to 8A Load Step, VOUT = 1V </td> <td width="337" valign="top" style="width:252.5pt;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"> Dynamic Load 0A to 8A Load Step, VOUT = 2.5V </td> </tr> <tr> <td width="334" valign="top" style="width:250.75pt;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_rtq2159gqwtf-qa/html-images/image005_en.jpg"><img border="0" width="316" height="226" id="圖片 15" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image005_en.jpg" alt="Technical Document Image Preview" /></a> </td> <td width="337" valign="top" style="width:252.5pt;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_rtq2159gqwtf-qa/html-images/image006_en.jpg"><img border="0" width="312" height="221" id="圖片 17" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image006_en.jpg" alt="Technical Document Image Preview" /></a> </td> </tr> <tr> <td width="334" valign="top" style="width:250.75pt;border:solid #009EB8 1.0pt; border-top:none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt"> Start-Up Measurement from Enable: The EN Pin Low to High </td> <td width="337" valign="top" style="width:252.5pt;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 Measurement from Enable: The EN Pin High to Low </td> </tr> <tr> <td width="334" valign="top" style="width:250.75pt;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_rtq2159gqwtf-qa/html-images/image007_en.jpg"><img border="0" width="327" height="217" id="圖片 21" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image007_en.jpg" alt="Technical Document Image Preview" /></a> </td> <td width="337" valign="top" style="width:252.5pt;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_rtq2159gqwtf-qa/html-images/image008_en.jpg"><img border="0" width="321" height="222" id="圖片 33" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image008_en.jpg" alt="Technical Document Image Preview" /></a> </td> </tr> </table>

12. Evaluation Board Layout

<a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image009_en.jpg"><img border="0" width="491" height="344" id="圖片 1" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image009_en.jpg" alt="一張含有文字, 圖表, 方案, 工程製圖的圖片自動產生的描述" /></a> Figure 1. Top View (1st layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image010_en.jpg"><img border="0" width="491" height="345" id="圖片 8" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image010_en.jpg" alt="一張含有文字, 收據, 黑與白, 圖表的圖片自動產生的描述" /></a> Figure 2. PCB Layout—Inner Side (2nd Layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image011_en.jpg"><img border="0" width="492" height="345" id="圖片 9" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image011_en.jpg" alt="一張含有文字, 收據, 圖表, 黑與白的圖片自動產生的描述" /></a> Figure 3. PCB Layout—Inner Side (3rd Layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image012_en.jpg"><img border="0" width="491" height="345" id="圖片 13" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2159gqwtf-qa/html-images/image012_en.jpg" alt="一張含有文字, 寫生, 圖表, 圖畫的圖片自動產生的描述" /></a> Figure 4. Bottom View (4th Layer)

width

fixed-width

overviewSection

design-resources

designResourceMultipleTable

width

fixed-width

designResourceSection

i18n(tabs.related-product.title)

relatedProductTabs

i18n(tab-item.parameter-section.title)

parameterSection

parameterSectionTab

i18n(tab-item.package-size-pin-size-section.title)

packageSizePinsSizeSection

packageSizePinsSizeSectionTab

i18n(tab-item.product-feature-section.title)

productFeatureSection

productFeatureSectionTab

buttonSeeProductDifferences

text-with-icon

right

secondary-m

tertiary

i18n(button-item.see-product-differences.button-label)

i18n(button-item.see-product-differences.button-link)

_self

false

buttonFindOtherCategory

dropdown

i18n(button-item.find-other-category.button-label)

i18n(button-item.find-other-category.button-link)

_self

category-list

width

fixed-width

backgroundColor

F5F6F8

relatedProductSection

scrollable-table

parameterTable

width

fixed-width

parameterSection

normal-table

table-group

package-size-pins-size

packageSizePinsSizeTable

width

fixed-width

packageSizePinsSizeSection

productFeature

width

fixed-width

productFeatureSection

i18n(tabs.ordering-information.title)

orderingInformationTabs

i18n(tab-item.evb-section.title)

evbSection

evbSectionTab

i18n(tab-item.product-section.title)

productSection

productSectionTab

width

fixed-width

orderingInformationSection

evbImageSwitcher

normal-table

card-list

evb

evbTable

width

fixed-width

evbSection

productImageSwitcher

normal-table

card-list

products

productTable

width

fixed-width

productSection