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LM2575 - 52kHz Simple 1A Buck Regulator

General Description

The LM2575 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator.

Fixed versions are available with a 3.3V, 5V, 12V, fixed output.

Adjustable versions have an output voltage range from 1.23V to 37V.

Key Features

  • 3.3V, 5V, 12V, and adjustable output versions.
  • Voltage over specified line and load conditions: Fixed version: ±3% max. output voltage Adjustable version: ± 2% max. feedback voltage.
  • Guaranteed 1A output current.
  • Wide input voltage range: 4V to 40V.
  • Wide output voltage range 1.23V to 37V.
  • Requires only 4 external components.
  • 52kHz fixed frequency internal oscillator.
  • Low power standby mode IQ typically < 200µA.
  • 80%.

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Datasheet Details

Part number LM2575
Manufacturer Micrel Semiconductor
File Size 148.36 KB
Description 52kHz Simple 1A Buck Regulator
Datasheet download datasheet LM2575 Datasheet

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Full PDF Text Transcription (Reference)

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LM2575 Micrel LM2575 52kHz Simple 1A Buck Regulator General Description The LM2575 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3V, 5V, 12V, fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 1A load with excellent line and load regulation. These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator. The LM2575 series offers a high efficiency replacement for popular three-terminal adjustable linear regulators.