© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

VERY LOW DROPOUT 1.5 AMP

REGULATOR WITH ENABLE

SC1565

October 3, 2000

1

Volts

R2

R2)

(R1

1.200

VO

+

=

FEATURES

resistors)

(1)

Note:

(1) SO-8 and TO-220-5L packages only.

DESCRIPTION

The SC1565 is a high performance positive voltage

regulator designed for use in applications requiring very

low dropout voltage at up to 1.5 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

the

elimination

of

costly

heatsinks.

Additionally, the 5-lead TO-220 and SO-8 versions

have an enable pin to further reduce power dissipation

while shut down.

The SC1565 provides excellent

regulation over variations in line, load and temperature.

The SC1565 is available in the popular SO-8 surface

mount package with two internally preset output voltage

options, which are also adjustable using external

resistors. Also available are 5-lead and 3-lead TO-220

2.5V options (fixed output only for the 3-lead option)

and fixed output SOT-223 options.

APPLICATIONS

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

ORDERING INFORMATION

Notes:

(1) Where -X.X denotes voltage options. Available

voltages are: 2.5V and 1.8V. Output voltage can be ad-

justed (except SOT-223 and TO-220-3) using external

resistors, see Pin Description.

(2) Only available in tape and reel packaging. A reel

contains 2500 devices.

(3) Only available in tube packaging (no suffix re-

quired).

DEVICE

(1)

PACKAGE

SC1565IS-X.X.TR

(2)

SO-8

SC1565IST-X.X.TR

(2)

SOT-223

SC1565IT-X.X

(3)

TO-220-3

SC1565I5T-X.X

(3)

TO-220-5

TYPICAL APPLICATIONS

VIN

VO

ENABLE

U1

SC1565IS-X.X

1

2

3

4

5

6

7

8

EN

VIN

VO

ADJ

GND

GND

GND

GND

C1

C2

R1

R2

VIN

VO

ENABLE

U1

SC1565IS-X.X

1

2

3

4

5

6

7

8

EN

VIN

VO

ADJ

GND

GND

GND

GND

C1

C2

VIN

VO

C2

C1

U1

SC1565IT-2.5V and SC1565IST-X.X

1

2

3

VIN

GND

VO

VIN

ENABLE

VO

C1

C2

R1

R2

U1

SC1565I5T-2.5

2

1

3

5

4

VIN

EN

GND

ADJ

VO

Notes:

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

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

Volts

R2

R2)

(R1

1.200

VO

+

=