AME5131 datasheet(1/11 Pages) AME

Part #	AME5131

Description	Low Power DC/DC Boost Converter

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Manufacturer	AME [Analog Microelectronics]

Direct Link	http://www.ame.com.tw/

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AME, Inc.

1

AME5131

Low Power

DC/DC Boost Converter

l 0.6

Ω Internal Switch

l 1.8V to 5.5V Input Range

l Adjustable Output Voltage Up to 28V

l Input Under Voltage Protection

l 32

µA Typical No Load Quiescent Current

l 1

µA Shutdown Current

l SOT-25 Package

l All AME's Lead Free Products Meet RoHS

Standards

The AME5131 is a high-frequency boost converter dedi-

cated for LCD bias supply and white LED applications for

cellular phone backlighting, PDAs, and other hand-held

devices. The part can also be used to generate standard

3.3 V/5 V to 12 V power conversions.

The AME5131 has an internal 400mA switch current

limit, offering lower output voltage ripple. The 32

µA low

quiescent current together with an optimized control

scheme, allows device operation at high efficiencies and

maintains long battery lifetime. AME5131 uses SOT-25

package and gives a small size solution.

l White LED Back-Lighting

l Hand-held Devices

l Digital Cameras

l Portable Applications

l Internet Audio Player

l LCD Bias Power

l Standard 3.3 V/5 V to 12 V Conversions

n General Description

n Features

n Applications

n Typical Application

n Function Block Diagram

Driver

SW

GND

Boost

Controller

UVP

Soft Start

On / Off Time

Controller

Bandgap

FB

V

IN

Enable

EN

+

_

+

_

FB

EN

SW

GND

C

O

1μF

L1

10μH

C

FF

22PF

C

IN

4.7μF

V

IN

V

IN

1.8 V-5.5 V

1

3

2

4

5

R1

2.1M

R2

150K

D1

AME5131

V

IN ~28 V

V

OUT

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