POWER MANAGEMENT

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SC1453

150mA Ultra Low Dropout

Regulator with Low Noise Bypass

Features

Revision: April 21, 2008

Description

The SC1453 is a low dropout linear regulator that

operates from a +2.25V to +6.5V input range and

delivers up to 150mA. A PMOS pass transistor allows

the low 75µA supply current to remain independent of

load, making these devices ideal for battery operated

portable equipment such as cellular phones, cordless

phones and personal digital assistants.

The SC1453 has a bandgap reference bypass pin for

very low noise operation - a 10nF (typ.) capacitor may be

connected between this pin and ground. Other features

include low powered shutdown, short circuit protection,

thermal shutdown protection and reverse battery

protection. The SC1453 comes in the tiny 5 lead SOT-23

package and the ultra-low profile 5 lead TSOT-23.

Battery Powered Systems

Cellular Telephones

Cordless Telephones

Personal Digital Assistants

Portable Instrumentation

Modems

PCMCIA cards

“2982/5205” compatible pinout

Guaranteed 150 mA output current

2% output accuracy guaranteed over line, load and

temperature

Very small external components - designed to work

with ceramic capacitors

Low 26µV

(1.5V option, C

Very low supply current

Thermal overload protection

Reverse battery protection

Low power shutdown

Full industrial temperature range

Very low profile packaging available (1mm max. height)

Surface mount packaging (5 pin SOT-23 and

TSOT-23)

Available in Lead-free packages, fully WEEE and RoHS

compliant

VIN

VOUT

C3

1uF

C1

1uF

U1

SC1453

1

2

3

4

5

IN

GND

EN

BYP

OUT

C2

10nF

Applications

Typical Application Circuit