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SC1454

Dual 150mA Ultra Low

Dropout, Low Noise Regulator

POWER MANAGEMENT

Revision 1, November 2000

The SC1454 contains two ultra low dropout voltage

regulators (ULDOs). It operates from an input voltage

range of 2.25V to 6.5V, and a wide variety of output

voltage options are available. One ULDO has a fixed

output, and the other is either fixed (SETA pin grounded)

or adjustable using external resistors. Each ULDO has an

independent enable pin.

The SC1454 has a bypass pin to enable the user to

capacitively decouple the bandgap reference for very low

output noise (50µV

Designed specifically for battery operated systems, the

devices utilize CMOS technology to require very low

operating currents (typically 130µA with both outputs

supplying 150mA). In addition, the dropout voltage is

typically 155mV at 150mA, helping to prolong battery

life further. The devices are designed to provide 400mA

of peak current for applications which require high initial

inrush current.

They have been designed to be used with low ESR

ceramic capacitors to save cost and PCB area.

The SC1454 is available with a wide variety of voltage

options as standard. It comes in the tiny 8 lead MSOP

surface mount package.

OUTPUT A: 3.0V

OUTPUT B: 3.0V

VIN

ENABLE OUTPUT A

ENABLE OUTPUT B

C3

10nF

C2

1uF

C1

1uF

C4

1uF

U1

SC1454DIMS

1

2

3

4

5

7

6

8

OUTA

OUTB

GND

SETA

ENB

ENA

BYP

IN

OUTPUT A: 2.5V

OUTPUT B: 2.8V

VIN

ENABLE OUTPUT A

ENABLE OUTPUT B

C3

10nF

C4

1uF

C1

1uF

C2

1uF

R1

100k

R2

100k

U1

SC1454CIMS

1

2

3

4

5

7

6

8

OUTA

OUTB

GND

SETA

ENB

ENA

BYP

IN

Description

Features

Applications

Typical Application Circuit