Datasheet Summary
LM2631 Synchronous Step-Down Power Supply Controller
April 1999
LM2631 Synchronous Step-Down Power Supply Controller
General Description
The LM2631 controller provides all the active functions for step-down (buck) switching converters. These dc-to-dc converters provide core CPU power in battery-operated systems. High efficiency is achieved by using synchronous rectification and pulse-skipping mode operation at light load. Inexpensive N-channel MOSFETs are used to reduce system cost. Bootstrap circuit is used to drive the high-side N-channel MOSFET. Current mode control scheme is used to improve line regulation and transient response, also provides cycle-by-cycle current limiting. The...