AS1367

150mA, Adaptive Low Drop-Out Linear Regulator

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Revision 1.02

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Datasheet

1 General Description

The AS1367 is a precise, low noise, high speed, low

dropout regulator with adaptive operation. Features

included are high ripple rejection and low dropout volt-

age, a reference voltage source, an error amplifier and a

current limiter.

The AS1367 provides high speed operation, low power

consumption and high efficiency by automatically

switching between a light load and a heavy load mode

depending upon the output current level.

The EN function enables the output to be turned off,

while the electric charge at the output capacitor is

discharged via the internal auto-discharge resistance,

level.

Furthermore a Bypass Pin is included to reduce noise.

The device features integrate short-circuit and over

current protection. Under-Voltage lockout prevents

erratic operation when the input voltage is slowly

decaying. Thermal Protection shuts down the device

when die temperature reaches 160°C. This is a useful

protection when the device is under sustained short

circuit conditions.

The device is available in a 8-pin TDFN 2x2 package.

2 Key Features

!

Low Dropout Voltage: 110mV @ 150mA load

!

Operating Input Voltage Range: 2.0V to 5.5V

!

Output Voltage Range: 1.2V to 5.0V (50mV steps)

!

Max. Output Current: 150mA

!

Low Shutdown Current: 100nA

!

High PSRR: 60dB @ 10kHz

!

Integrated Overtemperature/Overcurrent Protection

!

Under-Voltage Lockout Feature

!

Chip Enable Input

!

Power-OK

!

Low Quiescent Current: 10µA

!

Low Output Noise: 15µV @ 100kHz Bandwidth

!

Operating Temperature Range: -40°C to +85°C

!

8-pin TDFN 2x2 Package

3 Applications

The AS1367 is ideal for cellular phones, cordless

phones, wireless communication equipment, portable

games, cameras, video recorders, portable audio-video

equipment and personal digital assistants.

Figure 1. AS1367 - Typical Application Diagram

Input

2V to 5.5V

1

100k

Ω

3.3µF

Output

1.2V to 5.0V

IN

IN

BYP

OUT

AS1367

POK

GND

SET

ON /

OFF

EN

10nF