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LM2574 - SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator

Datasheet Summary

Description

The LM2574 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation.

Features

  • include a guaranteed ± 4% tolerance on output voltage within specified input voltages and output load conditions, and ± 10% on the oscillator frequency. External shutdown is included, featuring 50 µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. Features n 3.3V, 5V, 12V, 15V, and adjustable output versions n Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±.

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Datasheet Details

Part number LM2574
Manufacturer National Semiconductor
File Size 639.73 KB
Description SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator
Datasheet download datasheet LM2574 Datasheet
Additional preview pages of the LM2574 datasheet.

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Full PDF Text Transcription

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LM2574/LM2574HV SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator June 1999 LM2574/LM2574HV SIMPLE SWITCHER™ 0.5A Step-Down Voltage Regulator General Description The LM2574 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator. The LM2574 series offers a high-efficiency replacement for popular three-terminal linear regulators.
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