DESCRIPTION
The L4974Aisa stepdownmonolithicpower switching regulator delivering 3.5A at a voltage variable from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. FEATURES
of BLOCK DIAGRAM Efficient operation at switching frequencies up to 200KHz allows reductionin the size and cost of externalfilter component. June 2000 1/22 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. L4974A ABSOLUTE MAXIMUM RATINGS
Symbo l V11 V11 V20 I20 VI V4 , V 8 V3 I3 V2, V 7, V 9, V10 I2 I7 I8 Ptot TJ, Tstg Input Voltage Input Operating Voltage Output DC Voltage Output Peak Voltage at t = 0.1µs f = 200khz Maximum Output Current Boostrap Voltage Boostrap Operating Voltage Input Voltage at Pins 4, 12 Reset Output Voltage Reset Output Sink Current Input Voltage at Pin 2, 7, 9, 10 Reset Delay Sink Current Error Amplifier Out...
STMicroelectronics
