CALIFORNIA MICRO DEVICES

PRELIMINARY

CM3501

© 2003 California Micro Devices Corp. All rights reserved

09/10/03

430 N. McCarthy Blvd, Milpitas, California 95035

Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

3

Pin Functions

deselected.

supply 100mA.

MOSFET switches are designed for low voltage drops

from the voltage input pins at their full rated currents.

internal MOSFET switches are designed for low voltage

drops from the voltage input pins at their full rated

currents.

Current loads of up to 750mA are allowed (from Vcc).

Current loads above 750mA may cause the constant-

current limiting circuit to operate – reducing the output

voltage.

Continuous over-current loads will cause the part’s

internal temperature to rise. If the internal temperature

exceeds 150’C then any switch that is in overcurrent

mode will be immediately turned off. Any switch that is

not in overcurrent mode will remain on – it will not be

affected by the over-temperature detection. Once the

part has cooled to 125’C then the switch or switches

that were in overcurrent mode will be automatically

turned on again.

During the cold-start interval when the input is initially

applied, internal circuitry provides a soft turn-on for

the switches, which limits peak in-rush current.

control which of the power switch pairs are turned on.

switches. The external device driving the SEL pin

must

able

to

source

and

sink

100

µA while

drain outputs, indicating an overcurrent fault condition

in 10msec (min.) fault blanking period after the

overcurrent fault condition has been detected, before

these outputs become active. The OC# outputs

become deasserted only when both the overcurrent

condition stops and when the voltage drop across the

switch is less than 1V. External pull-up resistors of

10k - 100k are required if the OC# outputs are used.

Pin Functions

Pin No.

Symbol

Description

1

GND

Negative reference for all voltages.

2

High current positive supply input.

3

Standby positive supply input. Also provides internal power.

4

SEL

5

OC2#

Active low when

6

7

8

OC1#

Active low when

STANDARD PART ORDERING INFORMATION

Pins

Package

Ordering Part Number

1

Part Marking

8

SOIC

CM3501-02SN

CM3501-02SN

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.