LM2574 5V High-Voltage Step-Down Voltage Regulator – Datasheet

The LM2574 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

LM2574 Pinout

LM2574 Pin Configuration

Pin No	Pin Name	Description
1	FB	Feedback Pin
2	SIG GND	Signal Ground Pin
3	ON/OFF	On/Off Pin
4	PWR GND	Power Ground Pin
5	Vin	Input Voltage Pin
6	*	No Connection
7	OUT	Output Pin
8	*	No Connection

LM2574 Key Features

• Guaranteed 0.5A 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
• Thermal shutdown and current limit protection

Application

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

You can download this datasheet for LM2574 5V High-Voltage Step-Down Voltage Regulator – Datasheet from the link given below: