The LM2574 family is a series of easy to use fixed and adjustable switching voltage regulators. The LM2574 contains all of the active circuitry necessary to construct a stepdown (buck) switching regulator and requires a minimum of external components. The LM2574 can supply 0.5A while maintaining excellent line and load regulation. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
3.3V, 5V, 12V, and adjustable output versions
Adjustable version output 1.23V to 37V ±4% Max. over Line and Load conditions.
Guaranteed 0.5A output current
Wide input voltage, up to 40V
Thermal shutdown and current limit protection
Requires only 4 external components.
Shutdown capability (standby mode)
Low power standby mode < 200µA typical
High efficiency
52kHz fixed frequency internal oscillator
Uses standard inductors
LM2574 Datasheet