CM3513 Datasheet, PDF (3/10 Pages) California Micro Devices Corp – USB 2.4A Overcurrent Switch

CALIFORNIA MICRO DEVICES
Pin Functions
Preliminary
CM3513
V_CC is the power source.
Pins 2 & 3 must be connected together externally
V_OUT 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 V_OUT, and set EN# low (<0.8V) to select
V_OUT.
OC# is an active low open-drain output voltage,
indicating an overcurrent fault condition has been
detected at V_OUT. 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 No.
1
2
3
4
5
6
7
8
Symbol
GND
V_CC
V_CC
EN#
OC#
V_OUT
V_OUT
V_OUT
Pin Descriptions
Description
Negative reference for all voltages.
Power Primary High current Positive supply input.
Power supply input connected to pin 2
Active low enable pin
Active low when V_OUT is in overcurrent mode. External pull-up resistor required.
Output connected to pins 7 and 8
Output connected to pins 6 and 8
Output connected to pins 6 and 7
Pins
8
Package
SOIC
STANDARD PART ORDERING INFORMATION
Ordering Part Number¹
Part Marking
CM3513-04SN
CM3513-04SN
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03 ^{430 N. McCarthy Blvd, Milpitas, California 95035 Tel: [phone] Fax: [phone]}
www.calmicro.com
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