AP7331

300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT

LOW DROPOUT LINEAR REGULATOR

AP7331

Document number: DS31914 Rev. 3 - 2

1 of 13

www.diodes.com

January 2011

© Diodes Incorporated

Description

The AP7331 is a 300mA, adjustable and fixed output

voltage, low dropout linear regulator. The device included

pass element, error amplifier, band-gap, current limit and

thermal shutdown circuitry. The device is turned on when EN

pin is set to logic high level.

The characteristics of low dropout voltage and low quiescent

current make it suitable for low power applications, for

example, battery powered devices. The typical quiescent

current is approximately 65

μA.

Built-in current-limit and thermal-shutdown functions prevent

IC from damage in fault conditions.

The AP7331 is available in SOT25 and DFN2020-6

packages.

Pin Assignments

Features

•

300mA Low Dropout Regulator with EN

•

•

Wide input voltage range: 2V to 6V

•

Wide adjustable output: 0.8V to 5.0V

•

Fixed output options: 1.0V to 3.3V

•

PSRR: 65dB typical at 100Hz

•

Fast start-up time: 80µs

•

Stable with low ESR, 1µF ceramic output capacitor

•

Excellent Load/Line Transient Response

•

Low dropout: 300mV typical at 300mA

•

Current limit protection

•

Short circuit protection

•

Thermal shutdown protection

•

Ambient temperature range: -40ºC to 85°C

•

SOT25 and DFN2020-6: Available in “Green” Molding

Compound (No Br, Sb)

•

Lead Free Finish/RoHS Compliant (Note 1)

Applications

•

XDSL Routers

•

Wireless LAN Cards

•

Desktop and Notebook Computers

•

Battery Powered Equipments

Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html

IN

EN

OUT

5

3

2

1

GND

NC

4

GND

OUT

4

IN

EN

NC

5

3

2

1

NC

6

GND

OUT

4

IN

EN

NC

5

3

2

1

ADJ

6

SOT25 (Fixed Output)

(Top View)

SOT25 (ADJ Output)

(Top View)

DFN2020-6 (Fixed Output)

(Top View)

DFN2020-6 (ADJ Output)

(Top View)