L49720MA TO-220 Transistor Integrated circuit Chip IC Electronics China Golden IC Supplier

L49720MA

2A SWITCHING REGULATOR

 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 DESCRIPTION

 The L4972Aisa stepdownmonolithicpowerswitching regulatordelivering2Aat avoltagevariable from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiencyand very fastswitching times. Features of the L4972A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mountedin a Powerdip16 + 2 + 2and SO20large plastic packages and requires few external components. Efficient operation at switching frequencies up to 200KHz allows reduction in the size and cost of external filter component.

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