L4977A Datasheet 7A SWITCHING REGULATOR

Manufacturer: STMicroelectronics

L4977A 7a switching regulator by STMicroelectronics - Datasheet Preview

Datasheet Details

Part number	L4977A
Manufacturer	STMicroelectronics
File Size	396.19 KB
Description	7A SWITCHING REGULATOR
Download	L4977A Download (PDF)

General Description

The L4977A is a stepdown monolithic power switching regulator delivering 7A at a voltage variable from 5.1 to 40V.

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.

Overview

® L4977A 7A SWITCHING REGULATOR 7A OUTPUT CURRENT 5.1V TO 40V OUTPUT VOLTAGE RANGE 0 TO 90% DUTY CYCLE RANGE INTERNAL FEED-FORWARD LINE REGULATION INTERNAL CURRENT LIMITING PRECISE 5.

Key Features

of the L4977A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multiwatt plastic power package and requires few external components. 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.

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