© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

VERY LOW DROPOUT, LOW

QUIESCENT 500mA REGULATOR

SC1563

PRELIMINARY - September 11, 2000

1

FEATURES

adjustable externally using resistors)

DESCRIPTION

The SC1563 is a high performance positive voltage

regulator designed for use in applications requiring

very low dropout voltage at up to 500 milliamps. 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 with no heatsink. Additionally, the SC1563

has a shutdown pin, to further reduce power

dissipation while shut down. The SC1563 provides

excellent regulation over variations in line, load and

temperature.

The SC1563 is available as a five terminal fixed or

adjustable output voltage device with enable. The

device is available in a 5-pin SOT-23 package and an

8-pin MSOP package for higher power dissipation/

lower junction temperature.

APPLICATIONS

DEVICE

(1)(2)(3)

PACKAGE

SC1563ISK-X.XTR

SOT-23-5L

SC1563IMS-X.XTR

MSOP-8

ORDERING INFORMATION

Notes:

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

voltages are: 1.8V, 2.5V, 2.8V, 3.0V, 3.1V and 3.3V.

(2) Output voltage can be adjusted using external re-

sistors, see Pin Description.

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

contains 2500 devices (MSOP-8) or 3000 devices

(SOT-23-5L).

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

TYPICAL APPLICATION

Internally Preset Output Voltage

Externally Set Output Voltage

Volts

R2

R2)

(R1

1.200

VO

+

=

VIN

SHDN

VO (X.XV)

VIN

SHDN

VO

U1

SC1563ISK-X.X

1

2

3

4

5

SHDN GND

ADJ

VO

VIN

C1

C2

U1

SC1563ISK-X.X

1

2

3

4

5

SHDN GND

ADJ

VO

VIN

C1

C2

R1

R2