3.3v/5a Single Output Separate Excitation Chopper Regulator Semicon Device

The STK740-441 is a separate-excitation Step-down chopper Regulator hybrid IC for the secondstage circuit and optimal as a 3.3V local power supply for use in Logic circuit that includes both 5V and 3.3V systems. This IC incorporates in the package all the necessary circuits for a chopper Regulator including power Switch error Amplifier soft start, shutdown type output short protec- tion, low-voltage malfunction prevention, on/off, and snubber circuits. Therefore, external components re- quired are input and output capacitors and choke coil only and this allows this IC to be used to construct a large-current (5A) chopper Regulator as if a 3-pin regula- tor were used. By Sanyo Semiconductor Corporation