AP7311

150mA, Low Quiescent Current, Fast Transient

Low Dropout Linear Regulator

AP7311 Rev. 2

1 of 13

NOVEMBER 2009

www.diodes.com

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150mA Low Dropout Regulator with EN

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Wide input voltage range: 2V to 6V

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Wide adjustable output: 0.8V to 5.0V

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Fixed output options: 1.0V to 3.3V

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PSRR: 65dB at 100Hz

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Fast start-up time: 80µs

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Stable with low ESR, 1µF ceramic output capacitor

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Excellent Load/Line Transient Response

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Low dropout: 150mV typical at 150mA

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Current limit protection

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Short circuit protection

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Thermal shutdown protection

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Ambient temperature range: -40ºC to 85°C

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SOT25: Available in “Green” Molding Compound

(No Br, Sb)

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Lead Free Finish/RoHS Compliant (Note 1)

The AP7311 is a 150mA, 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 AP7311 is available in SOT25 package.

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Notebook and Desktop Computers and Pheripherals

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Portable Devices

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Battery Powered Devices

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CD-ROM, DVD and LAN Cards

Typical Application Circuit

1uF

IN

GND

EN

OUT

Enable

1uF

AP7311

Fixed Output

1uF

IN

GND

EN

OUT

Enable

ADJ

R2

R1

1uF

AP7311

Adjustable Output

Features

Description

Applications

⎟⎟

⎠

⎞

⎜⎜

⎝

⎛

+

=

2

1

REF

OUT

R

R

1

V

V