BA9743AFV

 Built-in reference voltage current (±1%).
Timer latch, short-circuit protection circuit is built in.
Circuit to prevent malfunction during low input voltage is built in.
Built-in reference voltage (2.505V) output pin.
Rest period is adjustable over the whole range of duty ratio.

The BA9743AFV is a 2-channel switching regulator controller that uses a pulse width modulation (PWM) system. Both channels can be used for DC / DC converter operations including step up, step down, and inverting. Because the IC is compactly packaged, it is best suited for use as a power supply in portable equipment.