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Product details

Parameters

Vin (Min) (V) 2 Vin (Max) (V) 40 Vout (Min) (V) 1 Vout (Max) (V) 36 Iout (Max) (A) 0.75 Switching frequency (Min) (kHz) 16 Switching frequency (Max) (kHz) 24 Features Enable, Over Current Protection Duty cycle (Max) (%) 90 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Buck converters (integrated switch)

Features

  • Inverting and Non-Inverting Feedback Inputs
  • 1.0V Reference at Inputs
  • Operates from Supply Voltages of 2V to 40V
  • Output Current up to 750 mA, Saturation Less than 0.9V
  • Current Limit and Thermal Shut Down
  • Duty Cycle up to 90%

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Description

The LM2578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and inverting configurations. The LM2578A features a unique comparator input stage which not only has separate pins for both the inverting and non-inverting inputs, but also provides an internal 1.0V reference to each input, thereby simplifying circuit design and p.c. board layout. The output can switch up to 750 mA and has output pins for its collector and emitter to promote design flexibility. An external current limit terminal may be referenced to either the ground or the Vin terminal, depending upon the application. In addition, the LM2578A has an on board oscillator, which sets the switching frequency with a single external capacitor from <1 Hz to 100 kHz (typical).

The LM2578A is an improved version of the LM2578, offering higher maximum ratings for the total supply voltage and output transistor emitter and collector voltages.

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Technical documentation

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Type Title Date
* Datasheet LM2578A/LM3578A Switching Regulator datasheet (Rev. E) Apr. 03, 2013
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options

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