LM2640
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 Nchannel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range.
Key Features
- 2 200 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
- Precision 2.5V Reference Output
