LM25574 Step-Down Switching Regulator

National Semiconductor

Description

www.DataSheet4U.com LM25574 42V, 0.5A Step-Down Switching Regulator January 2007 LM25574 42V, 0.5A Step-Down Switching Regulator General Descriptio.
The LM25574 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minim.

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Datasheet Specifications

Part number: LM25574
Manufacturer: National Semiconductor
File Size: 431.45 KB
Datasheet: LM25574_NationalSemiconductor.pdf
Description: Step-Down Switching Regulator

Features

* Integrated 42V, 750mΩ N-channel MOSFET Ultra-wide input voltage range from 6V to 42V Adjustable output voltage as low as 1.225V 1.5% feedback reference accuracy Operating frequency adjustable between 50kHz and 1MHz with single resistor Mast

Applications

* where the output may be precharged before the LM25574 is enabled. An internal precharge MOSFET is turned on for 250ns each cycle just prior to the on-time interval of the buck switch. An external capacitor is required between the BST and the SW pins. A 0.022µF ceramic capacitor is recommended. The c

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LM25574 Step-Down Switching Regulator National Semiconductor

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