LM2641 Datasheet | National Semiconductor

LM2641 Dual Adjustable Step-Down Switching Power Supply Controller January 2000 LM2641 Dual Adjustable Step-Down Switching Power Supply Controller General Description The LM2641 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 N-channel 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 regardless of the load current level. High DC gain and current-mode feedback control assure excellent...