SC1462

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

HIGH OUTPUT CURRENT

CHARGE PUMP DOUBLER

October 20, 2000

1

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

DESCRIPTION

The SC1462 is a versatile charge pump designed for

use in battery operated power supply applications over

the wide input range of 1.65 to 5.5 volts. A simple, low

quiescent current charge pump doubler can be imple-

mented without costly inductors or capacitors. Internal

MOSFETs and control circuitry eliminate the need for

costly board space and design time. The small 6 lead

SOT-23 package helps minimize board space.

The SC1462 charge pump can be used for applica-

tions that require up to 80mA of output current with V

IN

= 2.5V to 5.5V. Typical dropout voltage (2*Vin-Vout) is

shown below for several values of Vin.

FEATURES

91% @ Vin = 2.5V, Iout = 45mA

94% @ Vin = 3.6V, Iout = 55mA

capacitors

range (-40°C to 85°C)

APPLICATIONS

ORDERING INFORMATION

DEVICE

(1)

PACKAGE

Temp. Range (T

SC1462ISKTR

SOT-23-6

-40°C to 85°C

Note:

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

contains 3000 devices.

TYPICAL APPLICATION SCHEMATIC

T ypical Dropou t Voltage vs Iou t

@T a = 25 Deg. C.

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

000E+0

20E-3

40E-3

60E-3

80E-3

100E-3

Iou t (A)

Vin = 1.5V

Vin = 2.5V

Vin = 3.6V

Vin = 4.5V

Vin = 5.5V