Name: EVB_RTQ2539CGQWF
Brand: Richtek

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The RTQ2539C is a high-current, ultra-low noise, ultra low-dropout (LDO) linear regulator. This document explains the function and use of the RTQ2539C evaluation board (EVB) and provides information for the setup and operating instructions, a schematic diagram, a printed circuit board (PCB) layout, and a bill of materials (BOM). For more detail information, please refer to the RTQ2539C datasheet.

EVB_RTQ2539CGQWF

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1. General Description

The RTQ2539C is a high-current, ultra-low noise, ultra low-dropout (LDO) linear regulator. This document explains the function and use of the RTQ2539C evaluation board (EVB) and provides information for the setup and operating instructions, a schematic diagram, a printed circuit board (PCB) layout, and a bill of materials (BOM). For more detail information, please refer to the RTQ2539C datasheet.

2. Performance Specification Summary

The RTQ2539C Evaluation Board (EVB) is a four-layer board measuring 50mm x 33.5mm with a copper thickness of 1oz, and the Table 1 is the summary of the EVB performance specificiaiton. Table 1. RTQ2539C 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 width="27%" style="width:27.86%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Key Features </td> <td width="43%" style="width:43.0%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Test Conditions </td> <td width="7%" style="width:7.28%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Min </td> <td width="7%" style="width:7.28%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Typ </td> <td width="7%" style="width:7.28%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Max </td> <td width="7%" style="width:7.32%;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="100%" colspan="6" style="width:100.0%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Input Range </td> </tr> <tr style="height:17.0pt"> <td width="27%" style="width:27.86%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Input Voltage </td> <td width="43%" style="width:43.0%;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 width="7%" style="width:7.28%;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"> 1.1 </td> <td width="7%" style="width:7.28%;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"> 1.1 </td> <td width="7%" style="width:7.28%;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 width="7%" style="width:7.32%;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="27%" style="width:27.86%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Enable Input Voltage </td> <td width="43%" style="width:43.0%;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 width="7%" style="width:7.28%;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"> 1.1 </td> <td width="7%" style="width:7.28%;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 width="7%" style="width:7.28%;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 width="7%" style="width:7.32%;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="100%" colspan="6" style="width:100.0%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Output Range </td> </tr> <tr style="height:17.0pt"> <td width="27%" style="width:27.86%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Output Voltage </td> <td width="43%" style="width:43.0%;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"> Using external resistive voltage divider </td> <td width="7%" style="width:7.28%;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"> 0.5 </td> <td width="7%" style="width:7.28%;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"> 0.5 </td> <td width="7%" style="width:7.28%;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"> 5.5 </td> <td width="7%" style="width:7.32%;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="27%" style="width:27.86%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Line Regulation </td> <td width="43%" style="width:43.0%;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 = 1mA, 1.1V ≤ VIN ≤ 6.5V </td> <td width="7%" style="width:7.28%;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 width="7%" style="width:7.28%;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"> 0.05 </td> <td width="7%" style="width:7.28%;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 width="7%" style="width:7.32%;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="27%" style="width:27.86%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Load Regulation </td> <td width="43%" style="width:43.0%;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"> 1mA ≤ IOUT ≤ 3A </td> <td width="7%" style="width:7.28%;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 width="7%" style="width:7.28%;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"> 0.08 </td> <td width="7%" style="width:7.28%;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 width="7%" style="width:7.32%;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:1.0cm"> <td width="27%" style="width:27.86%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> Dropout Voltage </td> <td width="43%" style="width:43.0%;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"> VIN = 1.1V to 6.5V, IOUT = 3A, VFB = 0.5V - 3% </td> <td width="7%" style="width:7.28%;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"> -- </td> <td width="7%" style="width:7.28%;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"> 55 </td> <td width="7%" style="width:7.28%;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"> 130 </td> <td width="7%" style="width:7.32%;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"> mV </td> </tr> <tr style="height:17.0pt"> <td width="100%" colspan="6" style="width:100.0%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Package </td> </tr> <tr style="height:17.0pt"> <td width="100%" colspan="6" style="width:100.0%;border:solid #009EB8 1.0pt; border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> WQFN-12L 2.2x2.5 (FC) </td> </tr> </table> </div>

3. Power-up & Measurement Procedure

<h3>Suggestion Required Equipments:</h3> <ul></ul> <li>RTQ2538H evaluation board</li> <li>DC power supply capable of at least 6.5V and 3A</li> <li>Electronic load capable of 3A</li> <li>Function generator</li> <li>Oscilloscope</li>

4. Test Procedure with Suitable Measurement Equipment:

<ul> <li>Connect input power supply with wide and short as possible to VIN and GND through GP1/GP2 terminals.</li> <li>Connect the electronic load to VOUT and GND through GP3/GP4 terminals.</li> <li>Turn on the power supply and make sure that the input voltage does not exceeds 6V.</li> <li>Check output voltage regulation with different IOUT for normal operation.</li> </ul>

5. Notifications:

<ul> <li>Do not turn on input power supply before all connections are ready.</li> <li>Do not use the oscilloscope probe with long ground lead for output ripple voltage measurement, it is recommended to touch the probe tip and groundring directly across the last output capacitor.</li> </ul>

6. Detailed Description of Hardware

<h3>Headers Description and Placement</h3> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image001_en.png"><img width="491" height="672" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image001_en.png" 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>.

7. 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="border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Test Point </td> <td width="15%" style="width:15.08%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Pin Name </td> <td width="71%" style="width:71.3%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Description </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> GP1 </td> <td width="15%" style="width:15.08%;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 </td> <td width="71%" style="width:71.3%;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"> Positive terminal for supply input voltage. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> GP2 </td> <td width="15%" style="width:15.08%;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"> GND </td> <td width="71%" style="width:71.3%;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"> Negative terminal for supply input voltage. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> GP3 </td> <td width="15%" style="width:15.08%;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 </td> <td width="71%" style="width:71.3%;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"> Positive terminal for output voltage. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> GP4 </td> <td width="15%" style="width:15.08%;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"> GND </td> <td width="71%" style="width:71.3%;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"> Negative terminal for output voltage. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> GP5 </td> <td width="15%" style="width:15.08%;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"> GND </td> <td width="71%" style="width:71.3%;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"> Reference ground test point. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> TP1 </td> <td width="15%" style="width:15.08%;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 </td> <td width="71%" style="width:71.3%;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"> For supply input voltage measurement. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> TP2 </td> <td width="15%" style="width:15.08%;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 </td> <td width="71%" style="width:71.3%;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 voltage input pin. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> TP3 </td> <td width="15%" style="width:15.08%;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"> PGOOD </td> <td width="71%" style="width:71.3%;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"> For power good measurement. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> TP4 </td> <td width="15%" style="width:15.08%;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 </td> <td width="71%" style="width:71.3%;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"> For output voltage measurement. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> JP1 </td> <td width="15%" style="width:15.08%;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 </td> <td width="71%" style="width:71.3%;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"> Connection for Enable voltage. </td> </tr> <tr style="height:17.0pt"> <td width="13%" style="width:13.62%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> JP2 </td> <td width="15%" style="width:15.08%;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"> PGOOD </td> <td width="71%" style="width:71.3%;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"> Connection for power good pu-ll high voltage. </td> </tr> </table>

8. Bill of Materials

<table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="683" style="margin-left:-.75pt;border-collapse:collapse;border:none"> <thead> <tr style="height:17.0pt"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Reference </td> <td width="8%" style="width:8.3%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Count </td> <td width="22%" style="width:22.12%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Part Number </td> <td width="24%" style="width:24.9%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Description </td> <td width="16%" style="width:16.58%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Package </td> <td width="14%" style="width:14.22%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Manufacturer </td> </tr> </thead> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> U1 </td> <td width="8%" style="width:8.3%;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"> 1 </td> <td width="22%" style="width:22.12%;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"> RTQ2539CGQWF </td> <td width="24%" style="width:24.9%;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 </td> <td width="16%" style="width:16.58%;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"> WQFN-12L 2.2x2.5 (FC) </td> <td width="14%" style="width:14.22%;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"> RICHTEK </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> C3, C6 </td> <td width="8%" style="width:8.3%;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"> 2 </td> <td width="22%" style="width:22.12%;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"> 1210X476K160CT </td> <td width="24%" style="width:24.9%;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"> Capacitor, Ceramic, 47µF, 16V, X5R </td> <td width="16%" style="width:16.58%;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"> C-1210 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> C4, C5 </td> <td width="8%" style="width:8.3%;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"> 2 </td> <td width="22%" style="width:22.12%;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"> 0603B104K500CT </td> <td width="24%" style="width:24.9%;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"> Capacitor, Ceramic, 0.1µF, 50V, X7R </td> <td width="16%" style="width:16.58%;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"> C-0603 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> C9, C11 </td> <td width="8%" style="width:8.3%;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"> 2 </td> <td width="22%" style="width:22.12%;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"> 0603B103K500CT </td> <td width="24%" style="width:24.9%;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"> Capacitor, Ceramic, 10nF, 50V, X7R </td> <td width="16%" style="width:16.58%;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"> C-0603 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> C10 </td> <td width="8%" style="width:8.3%;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"> 1 </td> <td width="22%" style="width:22.12%;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"> 0603B105K250CT </td> <td width="24%" style="width:24.9%;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"> Capacitor, Ceramic, 1µF, 25V, X5R </td> <td width="16%" style="width:16.58%;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"> C-0603 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> R1 </td> <td width="8%" style="width:8.3%;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"> 1 </td> <td width="22%" style="width:22.12%;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"> WR06X1072FTL </td> <td width="24%" style="width:24.9%;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"> Resistor, Chip, 10.7k, 1% </td> <td width="16%" style="width:16.58%;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"> R-0603 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> R2 </td> <td width="8%" style="width:8.3%;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"> 1 </td> <td width="22%" style="width:22.12%;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"> WR06X1911FTL </td> <td width="24%" style="width:24.9%;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"> Resistor, Chip, 1.91k, 1% </td> <td width="16%" style="width:16.58%;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"> R-0603 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> <tr style="height:1.0cm"> <td width="13%" style="width:13.88%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:1.0cm"> R3, R5 </td> <td width="8%" style="width:8.3%;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"> 2 </td> <td width="22%" style="width:22.12%;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"> WR06X1003FTL </td> <td width="24%" style="width:24.9%;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"> Resistor, Chip, 100k, 1% </td> <td width="16%" style="width:16.58%;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"> R-0603 </td> <td width="14%" style="width:14.22%;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"> WALSIN </td> </tr> </table>

9. Typical Applications

<h3>EVB Schematic Diagram</h3> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image002_en.png"><img border="0" width="684" height="193" id="Picture 7" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image002_en.png" alt="Technical Document Image Preview" /></a>

10. Measure Result

<table class="MsoTableLightListAccent2" border="1" cellspacing="0" cellpadding="0" width="680" style="border-collapse:collapse;border:none"> <tr style="height:17.0pt"> <td width="50%" style="width:50.02%;border:solid #009EB8 1.0pt;background: #009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> PSRR vs. Frequency and VOUT </td> <td width="49%" style="width:49.98%;border:solid #009EB8 1.0pt;border-left: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> PSRR vs. Frequency and IOUT </td> </tr> <tr style="height:17.0pt"> <td width="50%" style="width:50.02%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image003_en.png"><img border="0" width="326" height="268" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image003_en.png" alt="Technical Document Image Preview" /></a> </td> <td width="49%" style="width:49.98%;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 class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image004_en.png"><img border="0" width="325" height="267" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image004_en.png" alt="Technical Document Image Preview" /></a> </td> </tr> <tr style="height:17.0pt"> <td width="50%" style="width:50.02%;border:solid #009EB8 1.0pt;border-top: none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Output Noise vs. Frequency and VOUT </td> <td width="49%" style="width:49.98%;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;height:17.0pt"> Output Noise vs. Frequency and CNR/SS </td> </tr> <tr style="height:205.15pt"> <td width="50%" style="width:50.02%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:205.15pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image005_en.png"><img border="0" width="326" height="268" id="圖片 3" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image005_en.png" alt="Technical Document Image Preview" /></a> </td> <td width="49%" style="width:49.98%;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:205.15pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image006_en.png"><img border="0" width="325" height="267" id="圖片 4" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image006_en.png" alt="Technical Document Image Preview" /></a> </td> </tr> <tr style="height:17.0pt"> <td width="50%" valign="top" style="width:50.02%;border:solid #009EB8 1.0pt; border-top:none;background:#009EB8;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> Power Up Response </td> <td width="49%" valign="top" style="width:49.98%;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;height:17.0pt"> Load Transient Response </td> </tr> <tr style="height:17.0pt"> <td width="50%" style="width:50.02%;border:solid #009EB8 1.0pt;border-top: none;padding:0cm 5.4pt 0cm 5.4pt;height:17.0pt"> <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image007_en.png"><img border="0" width="303" height="226" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image007_en.png" alt="Technical Document Image Preview" /></a> </td> <td width="49%" style="width:49.98%;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 class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image008_en.png"><img border="0" width="314" height="227" id="圖片 2" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image008_en.png" alt="Technical Document Image Preview" /></a> </td> </tr> </table>

11. Evaluation Board Layout

Figure 1 to Figure 4 are the RTQ2539C evaluation board layout. <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image009_en.jpg"><img border="0" width="491" height="330" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image009_en.jpg" alt="一張含有圖表, 文字, 圖畫, 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_rtq2539cgqwf/html-images/image010_en.jpg"><img border="0" width="491" height="330" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image010_en.jpg" alt="一張含有螢幕擷取畫面, 文字, 數字, 圖表的圖片自動產生的描述" /></a> Figure 2. Inner Side (2nd Layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image011_en.jpg"><img border="0" width="491" height="330" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image011_en.jpg" alt="一張含有螢幕擷取畫面, 文字, 圖表, 數字的圖片自動產生的描述" /></a> Figure 3. Inner Side (3rd Layer) <a class="fancybox" href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image012_en.jpg"><img border="0" width="492" height="330" id="圖片 1" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2539cgqwf/html-images/image012_en.jpg" alt="一張含有文字, 字型, 螢幕擷取畫面, 圖表的圖片自動產生的描述" /></a> Figure 4. Bottom View (4th Layer)

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