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LM2574 - 52kHz Simple 0.5A Buck Regulator

General Description

The LM2574 family is a series of easy to use fixed and adjustable switching voltage regulators.

The LM2574 contains all of the active circuitry necessary to construct a stepdown (buck) switching regulator and requires a minimum of external components.

Key Features

  • 3.3V, 5V, 12V, and adjustable output versions.
  • Adjustable version output 1.23V to 37V ±4% max. over line and load conditions.
  • Guaranteed 0.5A output current.
  • Wide input voltage, up to 40V.
  • Thermal shutdown and current limit protection.
  • Requires only 4 external components.
  • Shutdown capability (standby mode).
  • Low power standby mode < 200µA Typical.
  • High-efficiency.
  • 52kHz fixed frequency internal oscillator.

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Datasheet Details

Part number LM2574
Manufacturer Micrel Semiconductor
File Size 185.12 KB
Description 52kHz Simple 0.5A Buck Regulator
Datasheet download datasheet LM2574 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM2574 Micrel, Inc. LM2574 52kHz Simple 0.5A Buck Regulator General Description The LM2574 family is a series of easy to use fixed and adjustable switching voltage regulators. The LM2574 contains all of the active circuitry necessary to construct a stepdown (buck) switching regulator and requires a minimum of external components. The LM2574 is available in 3.3V and 5V fixed output versions, or an adjustable version with an output voltage range of 1.23V to 37V. Output voltage is guaranteed to ±4% for specified input and load conditions. The LM2574 can supply 0.5A while maintaining excellent line and load regulation. The output switch includes cycleby-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.