SC1540

SC1540A

© 2000 SEMTECH CORP.

300mA AND 500mA LOW DROPOUT

VOLTAGE REGULATORS WITH ENABLE

PRELIMINARY - May 1, 2000

652 MITCHELL ROAD NEWBURY PARK CA 91320

1

Notes:

(1) 2 inch square of 1/16” FR-4, double sided, 1 oz.

minimum copper weight.

ABSOLUTE MAXIMUM RATINGS

DESCRIPTION

The SC1540 and SC1540A are high performance low

dropout positive voltage regulators designed for use in

applications where power management is critical, such

as battery powered systems. Additionally, the

SC1540(A) provides excellent regulation over varia-

tions in line, load and temperature. Outstanding fea-

tures include low dropout performance at rated current,

fast transient response, internal current limiting and

thermal shutdown protection of the output device. A

very low quiescent current of 10µA in shutdown mode

reduces power dissipation. With three voltage options

available, the SC1540(A) comes in the popular SO-8

surface mount package.

APPLICATIONS

Parameter

Symbol

Maximum

Units

Maximum Input Pin

Voltage

VIN, EN

7

V

Power Dissipation

P

D

Internally

Limited

W

Thermal Resistance

Junction to Case

SO-8

θ

JC

47

°C/W

Thermal Resistance

Junction to Ambient

SO-8

(1)

θ

JA

65

°C/W

Operating Junction

Temperature Range

T

J

0 to 125

°C

Storage Temperature

Range

T

STG

-65 to 150

°C

Lead Temperature

(Soldering) 10 Sec

T

LEAD

260

°C

ORDERING INFORMATION

Notes:

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

are: 1.8V, 2.5V and 3.3V. Contact factory for additional

voltage options.

(2) Only available in tape and reel packaging (suffix ‘.TR’)

e.g. SC1540CS-X.X-.TR.

DEVICE

(1)(2)

OUTPUT CURRENT

PACKAGE

SC1540CS-X.X

300mA

SO-8

SC1540ACS-X.X

500mA

SO-8

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

FEATURES

temperature

BLOCK DIAGRAM

PIN CONFIGURATIONS

SO-8

Top View