L4977A Datasheet PDF | STMicroelectronics

STMicroelectronics L4977A

The L4977A is a stepdown monolithic power switching regulator delivering 7A at a voltage variable from 5.1 to 40V. The device is mounted in a 15-lead multiwatt plastic power package and requires few external components. Features of the L4977A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection.

Part No.	L4977A
Datasheet	L4977A Download
Manufacturer	STMicroelectronics
Description	7A SWITCHING REGULATOR
Buy	Stock & Price

DESCRIPTION

BLOCK DIAGRAM MULTIPOWER BCD TECHNOLOGY Multiwatt15V ORDERING NUMBER: L4977A Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter components. June 2000 1/21 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. L4977A

ABSOLUTE MAXIMUM RATINGS

Symbol V9 V9 V7 I7 V6 V3, V12 V4 I4 V5, V 10, V11, V13 I5 I10 I12 Ptot Tj, Tstg Input Voltage Input Operating Voltage Output DC Voltage Output Peak Voltage at t = 0.1 µs f = 200KHz Maximum Output Current Bootstrap Voltage Bootstrap Operating Voltage Input Voltage at Pins 3, 12 Reset Output Voltage Reset Output Sink Current Input Voltage at Pin 5, 10, 11, 13 Reset Delay Sink Current Error Amplifier Output Sink Current Soft Start Sink Current Total Power Diss...