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

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.

Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient pow

LM2640 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