CM3513 datasheet(3/10 Pages) CALMIRCO

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CALIFORNIA MICRO DEVICES

Preliminary

CM3513

Note: This is a preliminary datasheet only. Data subject to change at any time.

11/10/03

430 N. McCarthy Blvd, Milpitas, California 95035

Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

Pin Functions

VCC is the power source.

Pins 2 & 3 must be connected together externally

VOUT provides the power for the loads. The internal

MOSFET switch is designed for very low voltage drops

from the voltage input pins at the full rated current.

Pins 6, 7 & 8 must be connected together externally.

Current loads of up to 2.4A are allowed. Current loads

above 2.4A 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 the switch immediately turns off.

Once the part has cooled to 125’C then the switch

automatically turns on again.

During the cold-start interval when the input is initially

applied, internal circuitry provides a soft turn-on for the

switch, which limits peak in-rush current.

EN# is the active low logic input pin that is used to

control the power switch. Set EN# high (>2V) to

deselect VOUT, and set EN# low (<0.8V) to select

VOUT.

OC# is an active low open-drain output voltage,

indicating an overcurrent fault condition has been

detected at VOUT. There is a built-in 10msec (min.)

fault blanking delay after the overcurrent fault

condition has been detected, before this output

becomes active low. The OC# output deasserts only

when both the overcurrent condition stops and when

the voltage drop across the switch is less than 1V. An

external pull-up resistor of 10k - 100k is required if

the OC# output is used.

GND is the negative reference for all voltages.

Pin Descriptions

Pin No.

Symbol

Description

GND

Negative reference for all voltages.

VCC

Power Primary High current Positive supply input.

VCC

Power supply input connected to pin 2

EN#

Active low enable pin

OC#

Active low when VOUT is in overcurrent mode. External pull-up resistor required.

VOUT

Output connected to pins 7 and 8

VOUT

Output connected to pins 6 and 8

VOUT

Output connected to pins 6 and 7

STANDARD PART ORDERING INFORMATION

Pins

Package

Ordering Part Number

Part Marking

SOIC

CM3513-04SN

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

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