GENERAL DESCRIPTION
The LM2575HV/LM2576HV/HM2676HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V and adjustable output versions.

FEATURES
◾ 3.3V, 5V, 12V, 15V and adjustable output versions
◾ Adjustable version output voltage range, 1.23V to 57V ± 4% max over line and load conditions
◾ Guaranteed 3A output current
◾ Wide input voltage range, 60V
◾ Requires only 4 external components
◾ 52 kHz fixed frequency oscillator
◾ TTL shutdown capability, low power standby mode
◾ High efficiency
◾ Uses readily available standard inductors
◾ Thermal shutdown and current limit protection

APPLICATIONS
◾ Simple high-efficiency step-down (buck) regulator
◾ Efficient pre-regulator for linear regulators
◾ On-card switching regulators
◾ Positive to negative converter (Buck-Boost)