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L4972A
2A SWITCHING REGULATOR
1 Features
■ 2A OUTPUT CURRENT ■ 5.1V TO 40V OUTPUT VOLTAGE RANGE ■ 0 TO 90% DUTY CYCLE RANGE ■ INTERNAL FEED-FORWARD LINE REG. ■ INTERNAL CURRENT LIMITING ■ PRECISE 5.1V ± 2% ON CHIP REFERENCE ■ RESET AND POWER FAIL FUNCTIONS ■ INPUT/OUTPUT SYNC PIN ■ UNDER VOLTAGE LOCK OUT WITH
HYSTERETIC TURN-ON ■ PWM LATCH FOR SINGLE PULSE PER
PERIOD ■ VERY HIGH EFFICIENCY ■ SWITCHING FREQUENCY UP TO 200KHz ■ THERMAL SHUTDOWN ■ CONTINUOUS MODE OPERATION
2 Description
The L4972A is a stepdown monolithic power switching regulator delivering 2A at a voltage variable from 5.1 to 40V.
Realized with BCD mixed technology, the device
Figure 2. Block Diagram
Figure 1. Packages
PowerDIP20 (16+2+2)
Table 1.
L4972A Datasheet
