CA3273
April 1994
High-Side Driver
Description
The CA3273 is a power IC equivalent of a P-N-P pass tran-
sistor operated as a high-side-driver current switch in either
the saturated (ON) or cutoff (OFF) modes. The CA3273
incorporates circuitry to protect the pass currents, excessive
input voltage, and thermal overstress. The high-side driver is
intended for general purpose, automotive and potentially
high-stress applications. If high-stress conditions exist, the
use of an external zener diode of 35V or less between sup-
ply and load terminals may be required to prevent damage
due to severe conditions (such as load dump, reverse bat-
tery and positive or negative transients). The CA3273 is
designed to withstand a nominal reverse-battery
(VBAT = 13V) condition without permanent damage to the
IC. The CA3273 is supplied in a modi鏗乪d 3-lead TO-202
plastic power package.
Features
鈥?Equivalent High Pass P-N-P Transistor
鈥?Current Limiting . . . . . . . . . . . . . . . . . . . . . .0.6A to 1.2A
鈥?Over-Voltage Shutdown . . . . . . . . . . . . . . +25V to +40V
鈥?Junction Temperature Thermal Limit. . . . . . . . . +150
o
C
鈥?Equivalent Beta of 25. . . . . . . . . . . . . . . . . . 400mA/0.5V
鈥?Internal Bandgap Voltage and Current Reference
Applications
鈥?Fuel Pump Driver
鈥?Relay Driver
鈥?Solenoid Driver
鈥?Stepper Motor Driver
鈥?Remote Power Switch
鈥?Logic Control Switch
Ordering Information
PART
NUMBER
CA3273
TEMPERATURE
RANGE
-40
o
C to +85
o
C
PACKAGE
TO-202 Modified SIP
Pinout
CA3273 (SIP)
TOP VIEW
Block Diagram
OUTPUT PASS
TRANSISTOR
V
CC
(3) V
O
(LOAD)
(2) V
SW
(CONTROL)
(1) V
CC
(SUPPLY)
PIN 1
I
CC
R
S
I
O
V
O
PIN 3
DRIVE AND LIMITING
CONTROL
R
L
LOAD
CA3273
PIN 2
V
SW
CONTROL
INPUT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
407-727-9207
|
Copyright
漏
Intersil Corporation 1999
File Number
2113.4
3-3
1
2
3
4
