LM2575 5V High-Voltage Step-Down Voltage Regulator

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The LM2575 5V High-Voltage Step-Down Voltage Regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. This device is available in the fixed output voltage of 5V and an adjustable output version. Requiring a minimum number of external components, the regulator is simple to use and includes internal frequency compensation and a fixed-frequency oscillator.

The LM2574 offers a high-efficiency replacement for the popular three-terminal linear regulator. Because of its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 is available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

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LM2575 Pinout

LM2575 Pin Configuration

Pin No	Pin Name	Description
1	Vin	Input Voltage Pin
2	OUT	Output Pin
3	GND	Ground Pin
4	FB	FeedBack Pin
5	ON’/OFF	Complement On/Off Pin

LM2575 Key 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
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
Uses readily available standard inductors