LM2576S-ADJ SIMPLE SWITCHER 3A Step-Down Voltage Regulator

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LM2576S-ADJ SIMPLE SWITCHER 3A Step-Down Voltage Regulator

Features

►3.3V, 5V, 12V, 15V, and adjustable output versions

►Adjustable version output voltage range, 1.23V to 37V

(57V for HV version) ±4% max over line and load conditions

►Guaranteed 1A output current

►Wide input voltage range, 40V up to 60V for HV version

►Requires only 4 external components

►52 kHz fixed frequency internal oscillator

►TTL shutdown capability, low power standby mode

►High efficiency n Uses readily available standard inductors

► Thermal shutdown and current limit protection

► P+ Product Enhancement tested

Applications

► Simple high-efficiency step-down (buck) regulator

►Efficient pre-regulator for linear regulators

►On-card switching regulators

► Positive to negative converter (Buck-Boost)

General Description

The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.

The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.