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1A, Low Noise, High PSRR, Low-Dropout Linear Regulator

EVB_RTQ2510GQV-QA(2)

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The Evaluation Board user guide describes the operational use of the RTQ2510-QA evaluation board as a reference design for demonstration and evaluation of the RTQ2510-QA, a low noise, high PSRR, low-dropout (LDO) linear regulator.
Included in this user guide are setup and operating instructions, thermal and layout guidelines, a printed circuit board (PCB) layout, a schematic diagram, and a bill of materials (BOM). For more detail information, please refer to the RTQ2510-QA datasheet.

General Description

The Evaluation Board user guide describes the operational use of the RTQ2510-QA evaluation board as a reference design for demonstration and evaluation of the RTQ2510-QA, a low noise, high PSRR, low-dropout (LDO) linear regulator.

Included in this user guide are setup and operating instructions, thermal and layout guidelines, a printed circuit board (PCB) layout, a schematic diagram, and a bill of materials (BOM). For more detail information, please refer to the RTQ2510-QA datasheet.



Performance Specification Summary

Summary of the RTQ2510-QA Evaluation Board performance specificiaiton is provided in Table 1. The ambient temperature is 25°C.


Table 1. RTQ2510-QA Evaluation Board Performance Specification Summary

Specification

Test Conditions

Min

Typ

Max

Unit

Input Voltage Range

2.2

3.8

6

V

Output Current

0

--

1

A

Output Voltage Range

0.8

3.3

5.5

V

Line Regulation

VOUT + 0.5V ≤ VIN ≤ 6V, VIN ≥ 2.2V, IOUT = 100mA

--

0.2

--

%

Load Regulation

100mA ≤ IOUT ≤ 1A

--

0.3

--

%

Dropout Voltage

VOUT + 0.5V ≤ VIN ≤ 6V,

VFB = 0V

VIN ≥ 2.2V, IOUT = 500mA

--

--

160

mV

VIN ≥ 2.5V, IOUT = 750mA

--

--

210

mV

VIN ≥ 2.5V, IOUT = 1A

--

--

370

mV



Power-up Procedure

Suggestion Required Equipments

  • RTQ2510-QA Evaluation Board
  • DC power supply capable of at least 6V and 1A
  • Electronic load capable of 1A
  • Function Generator
  • Oscilloscope

Quick Start Procedures

The Evaluation Board is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on supplies until all connections are made. 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 groundring directly across the last output capacitor.


Proper measurement equipment setup and follow the procedure below.

1) With power off, connect the input power supply to VIN and GND pins.

2) With power off, connect the electronic load between the VOUT and nearest GND pins.

3) Turn on the power supply at the input. Make sure that the input voltage does not exceeds 6V on the Evaluation Board.

4) Check for the proper output voltage using a voltmeter.

5) Once the proper output voltage is established, adjust the load within the operating ranges and observe the output voltage regulation, quiescent current, dropout voltage, PSRR, noise and other performance.



Detailed Description of Hardware

Headers Description and Placement

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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 evb_service@richtek.com.


Test Points

The EVB is provided with the test points and pin names listed in the table below.

Test Point/

Pin Name

Function

VIN

Supply input pin.

VOUT

Output of the regulator.

EN

Enable sense pin.

GND

System ground pin.

JP1

Provide connection between VOUT and FB pin.

JP2

User can decide EN pin connected to high or low.



Bill of Materials

VIN = 2.2V to 6V, VOUT = 0.8V to 5.5V, IOUT = 1A

Reference

Count

Part Number

Value

Description

Package

Manufacturer

U1

1

RTQ2510GQV-QA(2)

RTQ2510GQV-QA(2)

LDO

VDFN-8L 3x3

RICHTEK

C2

1

1206B105K500CT

1μF

Capacitor, Ceramic,

50V, X7R

1206

WALSIN

C3, C6, CEN1

3

0603B104K500CT

0.1μF

Capacitor, Ceramic,

50V, X7R

0603

WALSIN

C4

1

GRM31CR71H475KA12L

4.7μF

Capacitor, Ceramic,

50V, X7R

1206

TAIYO YUDEN

CNR1

1

0603B103K500CT

10nF

Capacitor, Ceramic,

50V, X7R

0603

WALSIN

R1

1

CR0603F30K9P05

30.9k

Resistor, Chip

0603

EVER OHMS

R2

1

WR06X1002FTL

10k

Resistor, Chip

0603

WALSIN

REN1

1

WR06X1003FTL

100k

Resistor, Chip

0603

WALSIN



Typical Applications

EVB Schematic Diagram

Technical Document Image Preview

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.


Measure Result

Power On from EN

Power Off from EN

Technical Document Image Preview

Technical Document Image Preview

Dropout Voltage vs. Output Current

PSRR vs. Frequency

Technical Document Image Preview

Technical Document Image Preview

Output Spectral Noise Density

Load Transient Response

Technical Document Image Preview

Technical Document Image Preview

Line Transient Response

Short Protection

Technical Document Image Preview

Technical Document Image Preview


Note:

1. When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the output capacitor.

2. The C4 component manufacturer used for these measurements is MURATA.



Evaluation Board Layout

Figure 1 and Figure 2 are RTQ2510 Evaluation Board layout. This board is constructed on two-layer PCB, outer layers with 1 oz. Cu and inner layers with 1 oz. Cu.

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Figure 1. Top View (1st layer)


一張含有 文字, 螢幕擷取畫面, 圓形, 字型 的圖片

自動產生的描述

Figure 2. Bottom View (2nd Layer)

Title Last Update Share Download
Evaluation Board User Guide 2024/02/19
Bill of Materials 2024/02/19
Schematic 2024/02/19
Gerber File 2024/02/19
RTQ2510-QA
RTQ2510-QA

The RTQ2510 is a high performance positive low dropout (LDO) regulator designed for applications requiring very low dropout voltage and ultra high Power Supply Ripple Rejection (PSRR) at up to 1A. The input voltage range is from 2.2V to 6V and the output voltage is programmable as low as 0.8V. A P-MOSFET switch provides excellent transient response with just a 4.7μF ceramic output capacitor. The external enable control effectively reduces power dissipation while shutdown and further output noise immunity is achieved through bypass capacitor on NR pin. Additionally, the RTQ2510 features a precise 3% output regulation over line, load, and temperature variations. The device is available in the VDFN-8L 3x3 package and is specified from -40°C to 125°C.

Part NumberDistributorStockBuy From Authorized Distributor
EVB_RTQ2510GQV-QA(2) Digikey 5 Buy
Mouser 0 Lead-Time: 14 weeks
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Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RTQ2510GQV-QA(2)VDFN3x3-81,500 Request Digikey 1,378 Buy
Mouser 0 Lead-Time: 14 weeks
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