LM2638 Motherboard Power-Supply Solution

National Semiconductor

Description

LM2638 Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and Two Linear Regulator Controllers May 1999 LM2638 Motherb.
The LM2638 provides a comprehensive embedded power supply solution for motherboards hosting high performance MPUs such as Pentium™ II, M II™, K6™-2 an.

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Datasheet Specifications

Part number: LM2638
Manufacturer: National Semiconductor
File Size: 165.42 KB
Datasheet: LM2638_NationalSemiconductor.pdf
Description: Motherboard Power-Supply Solution

Features

* n Provides 3 regulated voltages n Power Good flag and output enable n Charge pump pin Switching Section n Synchronous rectification n 5-bit DAC programmable down to 1.3V n Typical ± 1% DAC tolerance n Switching frequency: 50 kHz to 1 MHz n Over-voltage protection n Two methods of over-current protec

Applications

* n Embedded power supplies for motherboards n Triple DC/DC power supplies n Programmable high current DC/DC power supply Pin Configuration 24-Lead SOIC DS101034-1 Top View Order Number LM2638M See NS Package Number M24B M II™ is a trademark of Cyrix Corporation a wholly owned subsidiary of Nation

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LM2638 Motherboard Power-Supply Solution National Semiconductor

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