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SC4205

Very Low Dropout

1 Amp Regulator With Enable

POWER MANAGEMENT

Notes:

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

(2) This device is designed to operate with ceramic input and output capacitors.

Revision: June 28, 2004

The SC4205 is a high performance positive voltage

regulator designed for use in applications requiring very

low dropout voltage at up to 1 Amp. 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 the elimination of costly heatsinks. Additionally,

the SC4205 has an enable pin to further reduce power

dissipation while shut down. The SC4205 provides ex-

cellent regulation over variations in line, load and tem-

perature.

The SC4205 is available in the SOIC-8EDP package with

internally preset outputs that are also adjustable using

external resistors.

350mV dropout @ 1A

Adjustable output from 1.2V to 4.8V

2.5V and 1.8V options (adjustable externally

using resistors)

Over current and over temperature protection

Enable pin

10µA quiescent current in shutdown

Low reverse leakage (output to input)

Surface mount and through-hole packages

Full industrial temperature range

Available in SOIC-8EDP package

Battery powered systems

Motherboards

Peripheral cards

Network cards

Set Top Boxes

Medical Equipment

Notebook Computers

Description

Features

Applications

VIN

C1

C2

U1

SC4205

4

3

2

8

1

5

6

7

NC

VIN

EN

GND

NC

NC

VO

ADJ

VO

ENABLE

VIN

C1

C2

U1

SC4205

4

3

2

8

1

5

6

7

NC

VIN

EN

GND

NC

NC

VO

ADJ

VO

ENABLE

Volts

R2

R2)

(R1

1.2

VO

+

=

Typical Application Circuits

ENABLE

C1

R1

R2

VO

U1

SC4205

4

3

2

8

1

5

6

7

NC

VIN

EN

GND

NC

NC

VO

ADJ

C2

VIN