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SC1566

Very Low Dropout

3.0 Amp Regulator With Enable

POWER MANAGEMENT

VIN

ENABLE

VO = See equation below

C1

C2

R1

R2

U1

SC1566I5T-2.5

1

2

3

4

5

VIN

EN

GND

ADJ

VO

VIN

ENABLE

VO = 2.5V

C1

C2

U1

SC1566I5T-2.5

1

2

3

4

5

VIN

EN

GND

ADJ

VO

VIN

VO = 1.8V

C1

C2

U1

SC1566IT-1.8

1

2

3

VIN

GND

VO

Revision: April 27, 2005

The SC1566 is a high performance positive voltage

regulator designed for use in applications requiring very

low dropout voltage at up to 3 Amps. Since it has

superior dropout characteristics compared to regular

LDOs, it can be used to supply 2.5V on motherboards or

2.8V on peripheral cards from the 3.3V supply thus

allowing heat sink size reduction or elimination.

Additionally, the five pin versions of SC1566 have an

enable pin, to further reduce power dissipation while shut

down. The SC1566 provides excellent regulation over

variations in line, load and temperature.

The SC1566 is available as three terminal fixed output

voltage and five terminal fixed or adjustable output

voltage devices with enable. Two package options are

available: TO-263 and TO-220.

350mV dropout @ 3A

Adjustable output from 1.2V to 4.8V

2.5V and 1.8V options (5 pin parts also adjustable

externally using resistors)

Over current and over temperature protection

Enable pin

10µA quiescent current in shutdown

Low reverse leakage (output to input)

Full industrial temperature range

TO-220 and TO-263 packages

Battery powered systems

Motherboards and notebook computers

Peripheral cards

Network cards

Set top boxes

Medical equipment

Volts

R2

R2)

(R1

1.200

VO

+

=

Features

Description

Applications

Notes:

(1) Maximum VO setpoint for 1.8V parts = 5.4V

(2) This device is designed to operate with

ceramic input and output capacitors