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SC1541

1.0A Low Dropout Voltage

Regulator with Enable

POWER MANAGEMENT

Revision: November 25, 2009

The SC1541 is a high performance low dropout positive

voltage regulator designed for use in applications where

power management is critical, such as battery powered

systems.

Additionally, the SC1541 provides excellent regulation

over variations in line, load and temperature.

Outstanding features include low dropout performance

at rated current, fast transient response, internal

current limiting and thermal shutdown protection of the

output device. A very low quiescent current of 10µA in

shutdown mode reduces power dissipation.

The SC1541 is available with three different voltage

options as standard and two package options, SO-8 and

5-lead TO-263.

Low voltage microcontrollers

Switching power supply post-regulation

Instantly available circuits

Motherboards

Battery operated equipment

Low dropout performance, 1.3V max

Full current rating over line and temperature

Fast transient response

+2% total output regulation over line, load

and temperature

10µA max. quiescent current in shutdown

Three fixed output voltages

Line regulation 0.2% max.

Load regulation 0.4% max.

SO-8 and TO-263 packages

V

V

ENABLE SIGNAL

U1

SC1541

IN

EN GND

OUT

C2

10uF min.

C1

10uF

Tantalum

Tantalum

IN

OUT

Notes:

(1) Input and output capacitors should be located close to the device.

(2) Connect all pins to PCB (SO-8 package) for optimal thermal characteristics.

(3) Increasing the output capacitor value will improve the overall transient response.

(4) The device is enabled when V

than V

Description

Features

Applications

Typical Application Circuit