LM2640 Dual Adjustable Step-Down Switching Power-Supply Controller

National Semiconductor

Description

LM2640 Dual Adjustable Step-Down Switching Power Supply Controller December 1998 LM2640 Dual Adjustable Step-Down Switching Power Supply Controller .
The LM2640 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

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Datasheet Specifications

Part number: LM2640
Manufacturer: National Semiconductor
File Size: 542.79 KB
Datasheet: LM2640_NationalSemiconductor.pdf
Description: Dual Adjustable Step-Down Switching Power-Supply Controller

Features

* n 200 kHz fixed-frequency switching n Switching synchronization with an external signal up to 400 kHz n Optional pulse-skipping mode n Adjustable secondary feedback n Input undervoltage lockout n Output undervoltage shutdown protection n Output overvoltage shutdown protection n Programmable soft-sta

Applications

* n Notebook and subnotebook computers n Wireless data terminals n Battery-powered instruments Connection Diagram and Ordering Information 28-Lead TSSOP (MTC) DS100148-1 Top View Order Number LM2640MTC-ADJ See NS Package Number MTC28 © 1999 National Semiconductor Corporation DS100148 www. nationa

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LM2640 Dual Adjustable Step-Down Switching Power-Supply Controller National Semiconductor

National Semiconductor LM2640-like datasheet