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LM2640

Part Number	LM2640
Manufacturer	National Semiconductor
Description	Dual Adjustable Step-Down Switching Power-Supply Controller
Published	Mar 22, 2005
Detailed Description	LM2640 Dual Adjustable Step-Down Switching Power Supply Controller December 1998 LM2640 Dual Adjustable Step-Down Swit...
Datasheet	LM2640 PDF File

Overview

LM2640 Dual Adjustable Step-Down Switching Power Supply Controller December 1998 LM2640 Dual Adjustable Step-Down Switching Power Supply Controller General Description The LM2640 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.
Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range.
The pulse-skipping mode can be disabled in favor of fixed-frequency operation regardless of the load current level.
High DC gain and current-mode feedback control assure excellent li...

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