LM2641
Overview
The LM2641 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.
- 96% efficient 5.5 to 30V input range Dual outputs adjustable from 2.2 to 8V 0.5% typical load regulation error 0.002%/V typical line regulation error Features
- 300 kHz fixed-frequency switching
- Switching synchronization with an external signal up to 400 kHz
- Optional pulse-skipping mode
- Adjustable secondary feedback
- Input undervoltage lockout
- Output undervoltage shutdown protection
- Output overvoltage shutdown protection
- Programmable soft-start (each controller)
- 5V, 50 mA linear regulator output
