L4973
3.
5 A step down switching regulator
Features
■ Up to 3.
5 A step down converter ■ Operating input
voltage from 8 V to 55 V ■ 3.
3 V and 5.
1 V (±1%) fixed output, and
adjustable outputs from: – 0.
5 V to 50 V (3.
3 type) – 5.
1 V to 50 V (5.
1 type) ■ Frequency adjustable up to 300 kHz ■
Voltage feed forward ■ Zero load current operation (min.
1 mA) ■ Internal current limiting (pulse by pulse and HICCUP mode) ■ Precise 5.
1 V (1.
5%) reference
voltage externally available ■ Input/output synchronization function ■ Inhibit for zero current consumption (100 mA typ.
at VCC = 24 V) ■ Protection against feedback disconnection ■ Thermal shutdown ■ Output over
voltage protection ■ Soft-start functio...