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

National Semiconductor

Datasheet Details

The LM2640 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

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-start (each controller) n 5V, 50 mA linear regulator output n Precision 2.5V reference output n 28-pin TSSOP.

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Published: Mar 22, 2005 |