loading
Richtek

RT2101AGQW Evaluation Board

EVB_RT2101AGQW

Share

The RT2101A is a high efficiency step-down converter and capable of delivering 3A output current over a wide input voltage range from 2.95V to 6V. The RT2101A provides accurate regulation for a variety of loads with ±3% accuracy. For reducing inductor size, it provides up to 2MHz switching frequency. The efficiency is maximized through the integrated 45mΩ MOSFETs and 550μA typical supply current. Under voltage lockout voltage of the RT2101A is 2.7V, and it also provides external setting by a resistor network on the enable pin. The RT2101A provides protections such as inductor current limit under voltage lockout and thermal shutdown. The over temperature threshold is 145°C. The RT2101A is available in WQFN-16L 3x3 package.

Purpose

The RT2101A is a synchronous step-down converter with the input voltage range from 2.95V to 6V and provides 3A output current. This document explains the function and use of the RT2101A evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements.


Introduction

General Product Information

The RT2101A is a high efficiency step-down converter and capable of delivering 3A output current over a wide input voltage range from 2.95V to 6V. The RT2101A provides accurate regulation for a variety of loads with ±3% accuracy. For reducing inductor size, it provides up to 2MHz switching frequency. The efficiency is maximized through the integrated 45mΩ MOSFETs and 550μA typical supply current. Under voltage lockout voltage of the RT2101A is 2.7V, and it also provides external setting by a resistor network on the enable pin. The RT2101A provides protections such as inductor current limit under voltage lockout and thermal shutdown. The over temperature threshold is 145°C. The RT2101A is available in WQFN-16L 3x3 package.


Product Feature

  • Integrated 45mW MOSFETs
  • Input Range : 2.95V to 6V
  • Adjustable PWM Frequency : 700kHz to 2MHz
  • Output Current : 3A
  • 95% Efficiency
  • Adjustable Soft-Start
  • Power Good Indicator
  • Enable Control
  • Under Voltage Lockout
  • Current Limit
  • Thermal Shutdown

Key Performance Summary Table

Key Features

Evaluation Board Number : PCB038_V1

Input Voltage Range

2.95V to 6V

Max Output Current

3A

Default Output Voltage

1.8V

Default Marking & Package Type

RT2101AGQW, WQFN-16L 3x3

Operation Frequency

Adjustable from 700kHz to 2MHz


Bench Test Setup Conditions

Headers Description and Placement

Technical Document Image Preview

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

Signal

Comment (expected waveforms or voltage levels on test points)

VIN

Input voltage

Power input.

EN

Enable test point

Chip Enable. Externally pulled high to enable and pulled low to disable thischip. It is internally pulled up to high when the pin is floating.

GND

Ground

Power Ground.

PGOOD

Power good test point

Output of power good indicator.

BOOT

Bootstrap supply test point

Bootstrap supply for high-side gate driver. Connect a 0.1µF ceramic capacitor between the BOOT and SW pins.

LX

Switch node test point

Connect this pin to an external L-C filter.

RT/SYNC

Clock input

Frequency Setting and External Synchronous.


Power-up & Measurement Procedure

1. Apply a 12V nominal input power supply (2.95V < VIN < 6V) to the VIN and GND terminals.

2. Set the jumper at JP1 to connect terminals 1 and 2, connecting EN to enable operation.

3. Verify the output voltage (approximately 1.8V) between VOUT and GND.

4. Connect an external load up to 3A to the VOUT and GND terminals and verify the output voltage and current.


Output Voltage Setting

Set the output voltage with the resistive divider (R1, R2) between VOUT and GND with the midpoint connected to FB. The output is set by the following formula :

Technical Document Image Preview


Schematic, Bill of Materials & Board Layout

EVB Schematic Diagram

Technical Document Image Preview


Bill of Materials

Reference

Qty

Part number

Description

Package

Manufacturer

U1

1

RT2101AGQW

DC-DC Converter

WQFN-16L 3x3

Richtek

R1

1

RTT031182FTP

11.8k

R-0603

旺詮

R2

1

WR06X1002FTL

10k

R-0603

WALSIN

R3

1

WR06X7871FTL

7.68k

R-0603

WALSIN

R4

1

WR06X1803FTL

180k

R-0603

WALSIN

R5

1

WR06X1003FTL

100k

R-0603

WALSIN

C1

1

C2012X5R1C106KT

10µF/16V/X5R

C-0805

TDK

C3

1

C1608X5R1E105KT000E

1µF/25V/X5R

C-0603

TDK

C5, C6

2

GRM32ER61C226KE20L

22µF/16V/X7R

C-1210

muRata

C8

1

C1608X7R1H104KT000N

0.1µF/50V/X7R

C-0603

TDK

C10

1

0603B103K500

10nF/50V/x7R

C-0603

WALSIN

C11

1

0603B332K500

3.3nF/50V/X7R

R-0603

WALSIN

L1

1

7447714015

1.5µH/10A

10 x 10 x 5 mm

WE


PCB Layout

Technical Document Image Preview

Top View (1st layer)

Technical Document Image Preview

Bottom View (4th Layer)

Title Last Update Share Download
Evaluation Board User Guide 2017/03/09
Bill of Materials 2017/03/09
Gerber File 2017/03/09
Schematic 2017/03/09
RT2101A

2.95V至6V, 3A, 2MHz同步降壓轉換器

RT2101A

RT2101A 是高效率的降壓轉換器,在 2.95V~6V 輸入電壓範圍內,具有3A輸出電流的能力。RT2101A 在全輸入和負載範圍內的輸出電壓精度為 ±3%;其工作頻率為 2MHz,容許使用小尺寸的電感;其集成化開關的導通阻抗為 45mΩ,靜態電流消耗為 550μA,使其效率達到了最優化。RT2101A 的欠壓鎖定保護電壓為 2.7V。當VIN也同時作為EN端的控制信號時,可以通過對EN端外接電阻網路的不同比值間接實現欠壓鎖定電壓的調節。RT2101A 具有電感電流限制、欠壓鎖定和熱關機保護等功能,其過溫保護溫度閾值為 145°C。RT2101A 的封裝是 WQFN-16L 3x3。

Part NumberFree SampleBuy From Authorized Distributor
EVB_RT2101AGQW Not available Buy from Distributor
TOP