Regulator ICs Two-channel switching regulator controller BA9741F / BA9741FS The BA9741F and BA9741FS are two-channel switching regulator controllers that use the PWM method. Both circuits can be used for DC to DC conversion for step-up, step-down, and inverting. The IC comes in a compact package, making it ideal for use in portable equipment. Applications DC / DC converters for video cameras and notebook computers etc. Features 1) High-accuracy reference voltage circuit (±1%). 2) Timer-latch, short-circuit protection circuit 3) Miss-operation prevention circuit for low-voltage input. 4) Reference voltage with output (2.5V). 5) Rest period adjustment is possible over the entire duty range. Absolute maximum ratings (Ta = 25C) Recommended operating conditions (Ta = 25C) 427 Regulator ICs Block diagram Pin descriptions 428 BA9741F / BA9741FS Regulator ICs BA9741F / BA9741FS Electrical characteristics (unless otherwise noted, Ta = 25C, and VCC = 6V) 429 Regulator ICs Timing chart Electrical characteristic curves 430 BA9741F / BA9741FS Regulator ICs BA9741F / BA9741FS External dimensions (Units: mm) 431