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LM2638

Part Number	LM2638
Manufacturer	Texas Instruments
Description	Motherboard Power Supply Solution
Published	Aug 21, 2019
Detailed Description	OBSOLETE LM2638 www.ti.com SNVS046A – MAY 2004 – REVISED NOVEMBER 2004 LM2638 Motherboard Power Supply Solution with...
Datasheet	LM2638 PDF File

Overview

OBSOLETE LM2638 www.
ti.
com SNVS046A – MAY 2004 – REVISED NOVEMBER 2004 LM2638 Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and Two Linear Regulator Controllers Check for Samples: LM2638 FEATURES 1 •2345 Provides 3 regulated voltages • Power Good flag and output enable • Charge pump pin – Switching Section • Synchronous rectification • 5-bit DAC programmable down to 1.
3V • Typical ±1% DAC tolerance • Switching frequency: 50 kHz to 1 MHz • Over-voltage protection • Two methods of over-current protection • Adaptive non-overlapping FET gate drives • Soft start without external capacitor – Linear Section • N-FET and NPN drive capability • Ultra fast respo...

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