L4977A
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. 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 ponents. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter ponents.
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.
ABSOLUTE MAXIMUM RATINGS
Symbol V9 V9 V7 I7 V6 V3, V12 V4 I4 V5, V 10, V11, V13 I5 I10 I12 Ptot Tj, Tstg...
