®
L296
L296P
HIGH CURRENT SWITCHING REGULATORS
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4 A OUTPUT CURRENT
5.1 V TO 40 V OUTPUT VOLTAGE RANGE
0 TO 100 % DUTY CYCLE RANGE
PRECISE (
±
2 %) ON-CHIP REFERENCE
SWITCHING FREQUENCY UP TO 200 KHz
VERY HIGH EFFICIENCY (UP TO 90 %)
VERY FEW EXTERNAL COMPONENTS
SOFT START
RESET OUTPUT
EXTERNAL PROGRAMMABLE LIMITING
CURRENT (L296P)
CONTROL CIRCUIT FOR CROWBAR SCR
INPUT FOR REMOTE INHIBIT AND
SYNCHRONUS PWM
THERMAL SHUTDOWN
Multiwatt
(15 lead)
®
ORDERING NUMBERS :
L296 (Vertical)
L296HT (Horizontal)
L296P (Vertical)
L296PHT (Horizontal)
DESCRIPTION
The L296 andL296P are stepdownpowerswitching
regulators delivering 4 A at a voltage variable from
5.1 V to 40 V.
Featuresof the devices includesoft start, remotein-
hibit, thermal protection, a reset output for micro-
processors and a PWM comparator input for syn-
chronization in multichip configurations.
The L296P incudes external programmable limiting
current.
PIN CONNECTION
(top view)
The L296 and L296P are mounted in a 15-lead Mul-
tiwatt
®
plasticpowerpackageand requiresvery few
external components.
Efficient operation at switching frequencies up to
200 KHz allows a reduction in the size and cost of
external filter components. A voltage sense input
and SCR drive output are provided for optional
crowbar overvoltage protection with an external
SCR.
June 2000
1/22
STMICROELECTRONICS [ STMICROELECTRONICS ]
