Vishay Siliconix

SiP4282

New Product

Document Number: 73851

S-70069–Rev. C, 22-Jan-07

www.vishay.com

1

1 A Slew Rate Controlled Load Switch in PPAK SC75-6

FEATURES

•

1.8 V to 5.5 V Input Voltage range

at 5 V and 175 m

Ω at 3 V

•

Slew rate limited turn-on time options

- SiP4282-1: 1 ms

- SiP4282-3: 100 µs

•

Fast shutdown load discharge option

•

Low quiescent current, typically 2.5 µA

•

Low Shutdown Current < 1 µA

•

TTL/CMOS input logic level

•

UVLO of 1.4 V

APPLICATIONS

•

Cellular telephones

•

Digital still cameras

•

Personal digital assistants (PDA)

•

Hot swap supplies

•

Notebook computers

•

Personal communication devices

DESCRIPTION

The SiP4282 is a P-Channel MOSFET power switch IC

designed for high-side load switching applications. The out-

put switching transistor is a P-Channel MOSFET device that

has a 140 m

Ω R

power handling capacity. The SiP4282 is available in two dif-

ferent versions with turn-on and turn-off characteristics rang-

ing from very fast to slew rate limited. In addition to a fast

turn-off time of 4 µs, the SiP4282-3 version offers a shut-

down load discharge circuit to instantaneously turn off a load

circuit when the switch is disabled.

The SiP4282 load switch operates with an input voltage

ranging from 1.8 V to 5.5 V, making it ideal for both 3 V and

5 V systems. The SiP4282 also features an under-voltage

lock out which turns the switch off when an input undervolt-

age condition exists. Input logic levels are TTL and 2.5 V to

5 V CMOS compatible. This device has a very low operating

current (typically 2.5 µA), making it ideal for battery-powered

applications. In shutdown mode, the supply current

decreases to less than 1 µA.

The SiP4282 is available in a lead (Pb)-free 6 pin PPAK

SC75-6 package and is specified over - 40 °C to 85 °C tem-

perature range.

TYPICAL APPLICATION CIRCUIT

SiP4282

SiP4282 Typical Application Circuit

OUT

OUT

GND

GND

GND

ON/OFF

ON/OFF

C

1 µF

IN

C

0.1 µF

OUT

1

2

5

6

4

3