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

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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 NoPin NameDescription
1FBFeedback Pin
2SIG GNDSignal Ground Pin
3ON/OFFOn/Off Pin
4PWR GNDPower Ground Pin
5VinInput Voltage Pin
6*No Connection
7OUTOutput 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: