overview

1. Purpose

<p class="MsoNormal">The RTQ2503S is a high-current (3A), low-noise (4.4μVrms), high accuracy (1% over line, load, andtemperature), low-dropout linear regulator (LDO) capableof sourcing 3A with only maximum 180mV dropout. This document explains the function and use of the RTQ2503S evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements.</p>

2. Introduction

<h3>General Product Information</h3> <p class="bady">The RTQ2503S is a high-current (3A), low-noise (4.4μVrms), high accuracy (1% over line, load, and temperature), low-dropout linear regulator (LDO) capable of sourcing 3A with only maximum 180mV dropout. The device output voltage is pin-selectable (up to 3.95V) using a PCB layout without the need of external resistors, thus reducing overall component count. Designers can achieve higher output voltage with the use of external resistor divider. The device supports single input supply voltage as low to 1.1V that makes it easy to use.</p> <p class="bady">The low noise, high PSRR and high output current capability makes the RTQ2503S ideal to power noise-sensitive devices such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. With very high accuracy, remote sensing, and soft-start capabilities to reduce inrush current, the RTQ2503S is ideal for powering digital loads such as FPGAs, DSPs,and ASICs.</p> <p class="bady">The external enable control and power good indicator function makes the sequence control easier. The output noise immunity is enhanced by adding external bypass capacitor on NR/SS pin. The device is fully specified over the temperature range of T_J = −40°C to 125°C and is offered in a WQFN-20L 3.5x3.5 package.</p>

3. Product Feature

<ul> <li>Input Voltage Range : 1.1V to 6.5V</li> <li>Two Output Voltage Modes</li> ►0.8V to 5.5V (Set by a Resistive Divider)<br /> ►0.8V to 3.95V (Set via PCB Layout, No ExternalResistor Required) <li>Accurate Output Voltage Accuracy (1%) Over Line, Load and Temperature</li> <li>Ultra High PSRR : 40dB at 500kHz</li> <li>Excellent Noise Immunity</li> ►V_RMS at 0.8V Output<br /> ►7.7μV_RMS at 5.0V Output <li>Ultra Low Dropout Voltage : 180mV at 3A</li> <li>Enable Control</li> <li>Programmable Soft-Start Output</li> <li>Stable with a 47μF or Larger Ceramic Output Capacitor</li> <li>Support Power-Good Indicator Function</li> </ul>

4. Key Performance Summary Table

<table width="680" class="MsoTableLightListAccent2" style="border: currentColor; width: 510.2pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Key Features</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Evaluation Board Number : PCB100_V1</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Input Voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">1.1V ≤ (V_OUT + 0.3V) ≤ V_IN ≤ 6.5V</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Max Output Current</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">3A</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">Default Output Voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 1cm;"> <p class="ListParagraph1CxSpLast">1.5V, pin6 (100mV), pin7 (200mV) and pin9 (400mV) is tie to GND by JP3.</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.94%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Default Marking & Package Type</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.06%; height: 17pt;"> <p class="ListParagraph1CxSpLast">RTQ2503SGQW, WQFN-20L 3.5x3.5</p> </td> </tr> </tbody> </table>

5. Bench Test Setup Conditions

<h3>Headers Description and Placement </h3> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image001_en.png" class="fancybox"><img width="401" height="287" width="401" height="287" id="圖片 1" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image001_en.png" /></a></p> <p class="2">Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at <a href="mailto:evb_service@richtek.com" class="link">evb_service@richtek.com</a>.</p>

6. Test Points

<p class="MsoNormal">The EVB is provided with the test points and pin names listed in the table below.</p> <table width="680" class="MsoTableLightListAccent2" style="border: currentColor; width: 510.2pt; margin-left: 5.4pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 1cm;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 17%; height: 1cm;"> <p class="23CxSpFirst">Test point/</p> <p class="23CxSpMiddle">Pin name</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 1cm;"> <p class="23CxSpMiddle">Signal</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 1cm;"> <p class="23CxSpLast">Comment (expected waveforms or voltage levels on test points)</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">VOUT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 1cm;"> <p class="ListParagraph1CxSpLast">LDO output </p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 1cm;"> <p class="MsoNormal">LDO output terminal. A 22μF or greater of capacitance is at VOUT pin is required for stability. </p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">VIN</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 1cm;"> <p class="ListParagraph1CxSpLast">LDO input source</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 1cm;"> <p class="MsoNormal">LDO input terminal. Supply source available is (V_OUT + 0.3V) ≤ V_IN ≤ 6.5V.</p> </td> </tr> <tr style="height: 39.7pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 39.7pt;"> <p class="ListParagraph1">EN (Test pin)</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 39.7pt;"> <p class="MsoNormal">Enable test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 39.7pt;"> <p class="MsoNormal">Enable control input. Connecting this pin to logic high enables the regulator or driving this pin low puts it into shutdown mode. Enabling the device after VIN are present is preferred.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">GND</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 1cm;"> <p class="ListParagraph1CxSpLast">Ground</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 1cm;"> <p class="MsoNormal">Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum the power dissipation.</p> </td> </tr> <tr style="height: 51pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 51pt;"> <p class="ListParagraph1CxSpFirst">PG (Test pin)</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 51pt;"> <p class="ListParagraph1CxSpMiddle">Power good indicator output</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 51pt;"> <p class="ListParagraph1CxSpLast">An open-drain output and active high when the output voltage reaches 88% of the target. The pin is pulled to ground when the output voltage is lower than its specified threshold, EN shutdown, OCP and OTP.</p> </td> </tr> <tr style="height: 64.35pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 64.35pt;"> <p class="ListParagraph1CxSpFirst">50mV, 100mV, 200mV, 400mV, 800mV, 1.6V</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 64.35pt;"> <p class="ListParagraph1CxSpMiddle">Output voltage setting pins</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 64.35pt;"> <p class="ListParagraph1CxSpLast">Connect these pins to ground or leave floating. Connecting these pins to ground increases the output voltage by the valueof the pin name; multiple pins can be simultaneously connected to GND to select the desired output voltage. Leave these pins floating (open) if the VOUT voltage is set by external resistor.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">VOUT-sense</p> <p class="ListParagraph1CxSpMiddle">(Test pin)</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 1cm;"> <p class="ListParagraph1CxSpLast">Output voltage test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 1cm;"> <p class="MsoNormal">LDO output voltage level monitoring point.</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 17%; height: 17pt;"> <p class="ListParagraph1">VIN (Test pin)</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 22.16%; height: 17pt;"> <p class="MsoNormal">Input voltage test point</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 60.84%; height: 17pt;"> <p class="ListParagraph1">LDO input supply voltage monitoring point.</p> </td> </tr> </tbody> </table>

7. Output Voltage Setting

<p class="MsoNormal">The output voltage of the RTQ2503S can be set by external resistors or by output voltage setting pins (50mV, 100mV, 200mV, 400mV, 800mV and 1.6V) to achieve different output target.</p> <p class="MsoListParagraph"><strong>1. Setting output target by pins (50mV, 100mV, 200mV, 400mV, 800mV and 1.6V) :</strong></p> <p class="MsoNormal">The RTQ2503S also can short the pins pins (50mV, 100mV, 200mV, 400mV, 800mV and 1.6V) to ground and program the regulated output voltage level without external resistors after SNS pin is connected with VOUT pin .The pins pins (50mV, 100mV, 200mV, 400mV, 800mV and 1.6V) is connected with internal resistor pairs, each pin is either connected to ground (active) or left open (floating).</p> <p class="MsoNormal">The voltage programming is set as the sum of the internal reference voltage (V_REF = 0.8V) plus the accumulated sumof the respective voltages assigned to each active pin as illustrated in Figure 1.</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image002_en.png" class="fancybox"><img width="448" height="255" width="448" height="255" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image002_en.png" /></a></p> <p class="MsoNormal">Figure 1. Output Setting without External Resistors</p> <p class="MsoNormal">Table 1. summarizes these voltage values associated witheach active pin setting for reference. By leaving all programpins open, or floating, the output is thereby programmedto the minimum possible output voltage equal to V_REF (0.8V). The maximum output target can be supported up to 3.95V after all pins pins (50mV, 100mV, 200mV, 400mV, 800mV and 1.6V) are shorted with groundat the same time.</p> <p class="MsoNormal">Table 1. V_OUT Select Pin Settings for Different Target</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image003_en.png" class="fancybox"><img width="681" height="495" width="681" height="495" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image003_en.png" /></a></p> <p class="MsoNormal"><strong>2. Using external resistors</strong></p> <p class="MsoNormal">The output voltage is determined by the values of R1, R2 and keeps SNS pin be floating as Figure 2. The values of R1and R2 can be calculated with any voltage value via use the formula by below equation and the suggested R1, R2 resistance is (R1 + R2) < 50kΩ :</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image004_en.png" class="fancybox"><img width="125" height="48" width="125" height="48" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image004_en.png" /></a></p> <p class="MsoNormal">The suggested R1, R2 resistance is (R1 + R2) ≤ 50kΩ, the VOUT target range should be lower than (V_IN - 0.3V) for good load transient response and output regulation ability.</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image005_en.png" class="fancybox"><img width="405" height="159" width="405" height="159" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image005_en.png" /></a></p> <p class="MsoNormal">Figure 2. Output Voltage Set by External Resistors </p>

8. Power-up & Measurement Procedure

<p class="MsoListParagraph">1. Set the desired VOUT target value by JP6 that pull low the pins (50mV, 100mV, 200mV, 400mV, 800mV and 1.6V) with specific combination (reference the Table 1).</p> <p class="MsoListParagraph">2. Connect input power (1.1V ≤ V_OUT + 0.3V ≤ V_IN ≤ 6.5V) and input ground to VIN and GND test pins respectively.</p> <p class="MsoListParagraph">3. Connect positive end and negative terminals of load to VOUT and GND test pins respectively.</p> <p class="MsoListParagraph">4. There is a 3-pin header “EN” for enable control. To use a jumper at “VIN” option to tie EN test pin to input power VIN for enabling the device. Inversely, to use a jumper at “GND” option to tie EN test pin and ground GND for disabling the device.</p> <p class="MsoListParagraph">5. Verify the output voltage level between VOUT and GND. </p> <p class="MsoListParagraph">6. Connect an external load up to 3A to the VOUT and GND terminals and verify the output voltage and current.</p>

9. Schematic, Bill of Materials & Board Layout

<h3>EVB Schematic Diagram</h3> <p class="21"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image007_en.jpg" class="fancybox"><img width="681" height="316" width="681" height="316" id="圖片 9" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image007_en.jpg" /></a></p>

10. Bill of Materials

<table width="680" class="MsoTableLightListAccent2" style="border: currentColor; margin-left: 5.4pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 16.18%; height: 17pt;"> <p class="MsoNormal">Reference</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">Qty</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">Part Number</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt;"> <p class="MsoNormal">Description</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">Package</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">Manufacturer</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">U4</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">RTQ2503SGQW</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt;"> <p class="MsoNormal">Linear Regulator</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">WQFN-20L 3.5x3.5</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">RICHTEK</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">CFF, C-NR/SS</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">0603B103K500CT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt;"> <p class="MsoNormal">10nF/50V/X7R</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">CEN</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">C1608X7R1H104K080AA</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt;"> <p class="MsoNormal">100nF/50V/X7R</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">C2</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">GRM32ER61C476KE15L</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt;"> <p class="MsoNormal">47µF/16V/X5R</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">C-1210</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">C5</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">GRM32ER61C226KE20L</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt; white-space: nowrap;"> <p class="MsoNormal">22µF/16V/X5R</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">C-1210</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">Murata</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">R-SNS</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">WR06X000PTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt; white-space: nowrap;"> <p class="MsoNormal">0</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">REN1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">WR06X1002FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt; white-space: nowrap;"> <p class="MsoNormal">10k</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 16.18%; height: 17pt;"> <p class="MsoNormal">RPG</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.48%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 26.08%; height: 17pt;"> <p class="MsoNormal">WR06X1003FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.24%; height: 17pt;"> <p class="MsoNormal">100k</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 20.32%; height: 17pt;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 13.7%; height: 17pt;"> <p class="MsoNormal">WALSIN</p> </td> </tr> </tbody> </table>

11. PCB Layout

<p class="23CxSpFirst"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image008_en.jpg" class="fancybox"><img width="491" height="351" width="491" height="351" id="圖片 2" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image008_en.jpg" /></a></p> <p class="23CxSpLast">Top View (1^st layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image009_en.jpg" class="fancybox"><img width="491" height="353" width="491" height="353" id="圖片 4" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image009_en.jpg" /></a></p> <p class="10">PCB Layout—Inner Side (2^nd Layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image010_en.jpg" class="fancybox"><img width="491" height="352" width="491" height="352" id="圖片 7" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image010_en.jpg" /></a></p> <p class="10">PCB Layout—Inner Side (3^rd Layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image011_en.jpg" class="fancybox"><img width="491" height="353" width="491" height="353" id="圖片 8" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rtq2503sgqw/html-images/image011_en.jpg" /></a></p> <p class="23">Bottom View (4^th Layer)</p>