Datasheet > GRM188R71H472MA01

GRM188R71H472MA01

更新时间： 2024-11-25 01:15:07

品牌	Logo	应用领域
奥地利微 - AMS		/
页数	文件大小	规格书
18页	590K
描述
3A 20V Step-Down Converter plus 1A LDO

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AMS4123

3A 20V Step-Down Converter + 1A LDO

General Description

Features

The AMS4123 combines a 3A Step-Down converter

with a 1A LDO in a single SO-8 exposed paddle

package. Both the LDO and Step-Down converter

are low ESR, ceramic capacitor output, stable. The

Step-Down converter is internally compensated with

internal soft-start to minimize the number of external

components. An Enable pin provides built-in

externally programmable power-up sequencing. The

Step-Down converter enable threshold is 2.0V and

the LDO enable threshold is 2.5V. It also has hiccup

current limit and thermal protection. Thermal

protection shuts down both the Step-Down converter

and LDO when the die temperature exceeds 135°C.

•

Step-Down Converter + LDO in SO-8EP

Internally Compensated

Up to 95% Efficiency

Low ESR Ceramic Output Capacitor Stable

Soft Start

Under-Voltage Lockout

Dual Threshold Enable

300 kHz Switching Frequency

Hiccup Current Limit

Over-Temperature Shutdown

Ultra-Low Dropout LDO 350mV @ 1A

Up to 3A Step-Down Output Current

Up to 1A LDO Output Current

Excellent Light Load Efficiency

Both regulators are adjustable using

a 0.6V

reference for low output voltage settings. The LDO

has options for fixed output voltages from 0.6V to 5V

in 100mV steps. The LDO external input can be

powered from the Step-Down converter output, for

improved efficiency, or from any voltage source that

is less than or equal to the device supply voltage

(Vin). With a dropout voltage of less than 350mV at

1A, the AMS4123 LDO makes the perfect solution

for a low noise 1.8V power source developed from

2.5V Step-Down converter output. The AMS4123 is

a complete solution for LCD TV power requirements

when combined with the AMS4122 (2A Dual

Switching Regulator in SO-8).

Applications

•

Audio Power Amplifiers

Portable (Notebook) Computers

Point of Regulation for High Performance

Electronics

•

Consumer Electronics

DVD, Blue-ray DVD writers

LCD TVs and LCD monitors

Distributed Power Systems

Battery Chargers

Pre-Regulator for Linear Regulation

Typical Application

Vin 4.5V to 20V

220nF

10uH

AMS4123

2.5V at 2A

SW out

Vin

2.5V

LDOin

BST

22uF

100uF

10uF

1.8V at1A

B340LB

LDOout FB SW

20.0k

FB LDO

2.2uF

10.0k

31.6k

R1 and R4 Voltage Options

1.8V 20.0k

Enable

2.5V 31.6k

3.3V 45.3k

4.7nF

5.0V 73.2k

3/5/2010

www.advanced-monolithic.com

Phone (925) 443-0722

Fax (925) 443-0723

12 3 4 5 6 7...18

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与GRM188R71H472MA01相关器件

型号	品牌	获取价格	描述	数据表
GRM188R71H472MA01#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H473JA61	MURATA	获取价格	Chip Monolithic Ceramic Capacitor for General
GRM188R71H473JA61#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H473KA61#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H473MA61#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H511JA01#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H511KA01	MURATA	获取价格	Chip Monolithic Ceramic Capacitor for General
GRM188R71H511KA01#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H511MA01#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信
GRM188R71H512JA01#	MURATA	获取价格	民用设备,工业设备,移动设备,植入式以外的医疗器械设备 [GHTF A/B/C],汽车[信

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