AP7168

1.2A LOW DROPOUT REGULATOR WITH POK

AP7168

Document number: DS32019 Rev. 2 - 2

1 of 11

www.diodes.com

September 2010

© Diodes Incorporated

Description

The AP7168 is a 1.2A, adjustable output voltage, ultra-low

dropout linear regulator. The device includes pass element,

error amplifier, band-gap reference, current limit and thermal

shutdown circuitry. The device is turned on when EN pin is

set to logic high level. A Power-OK (POK) output is available

for power sequence control.

The characteristics of the low dropout voltage and low

quiescent current make it suitable for low to medium power

applications, for example, laptop computers, audio and video

applications, and battery powered devices. The typical

quiescent current is approximately 125µA.

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

IC from damage in fault conditions. The AP7168 is available

in SO-8EP package.

Features

•

Wide input voltage range: 2.2V – 5.5V

•

230mV very low dropout at 500mA load

•

500mV very low dropout at 1A load

•

•

Adjustable output voltage range: 0.8V to 5.0V

•

Very fast transient response

•

High PSRR

•

Accurate voltage regulation

•

Current limiting and short circuit protection

•

Thermal shutdown protection

•

Stable with any type output capacitor

≥ 4.7µF

•

Ambient temperature range -40ºC to 85°C

•

SO-8EP: Available in “Green” Molding Compound (No

Br, Sb)

•

Lead Free Finish/ RoHS Compliant (Note 1)

Pin Assignments

NC

NC

EN

IN

FB

GND

OUT

( Top View )

1

2

3

4

8

7

6

5

POK

SO-8EP

Applications

•

Servers and laptops

•

Smart phone and PDA

•

MP3/MP4

•

Bluetooth headset

•

Low and medium power applications

•

FPGA and DSP core or I/O power

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.

Typical Application Circuit

1µF

IN

GND

EN

OUT

Enable

FB

10µF

POK

100kOhm

AP7168

⎟⎟

⎠

⎞

⎜⎜

⎝

⎛

+

=

2

1

REF

OUT

R

R

1

V

V