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Product details

Parameters

Vin (Min) (V) 2 Vin (Max) (V) 40 Vout (Min) (V) 1 Operating temperature range (C) 0 to 125 Type Converter Rating Catalog open-in-new Find other Boost 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 Boost 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
Application notes AN-1066 Low Cost Boost Converters Using LM3578A (Rev. B) Apr. 23, 2013
More literature Die D/S LM3578A MWC Switching Regulator Sep. 25, 2012
Application notes AN-1055 Low-Cost Multiple Output Flyback Converter for I/O Cards May 10, 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

CALCULATION TOOLS Download
Fly-Buck and Flyback Topology Selector
FLYBUCK-FLYBACK-DESIGN-CALC This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Features
  • Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
  • Capability to design up to 6 isolated outputs
  • Recommends ICs for desired application design
  • Incorporates loop compensation in designs
  • Compares efficiency, external component count and transformer currents for every topology (...)

CAD/CAE symbols

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

Ordering & quality

Support & training

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Videos

Power Tips: Layout for a Boost Power Stage

This video shows a simplified schematic and PCB layout for a boost converter

Posted: 21-Jan-2016
Duration: 04:31

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