LM2640 Overview
The LM2640 is a dual step-down power supply controller intended for application in notebook personal puters and other battery-powered equipment. Fixed-frequency synchronous drive of logic-level Nchannel power MOSFETs is bined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range. The pulse-skipping mode can be disabled in favor of fixed-frequency operation...
LM2640 Key Features
- 2 200 kHz Fixed-Frequency Switching
- Switching Synchronization with an External
- 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
