View stk740-470 datasheet:

Ordering number:EN*6107 Thick Film Hybrid IC STK740-470 5V/5A Single Output Separate Excitation Chopper Regulator Preliminary Overview Package Dimensions The STK740-470 is a separate-excitation step-down unit:mm chopper regulator hybrid IC for the secondstage circuit. 4170-SIP28 This IC incorporates in the package all the necessary [STK740-470] circuits for a chopper regulator including power switch, error amplifier, soft start, shutdown type output short 46.6 protection, low-voltage malfunction prevention, on/off, 41.2 8.5 and snubber circuits. Therefore, external components required are input and output capacitors and a choke coil only and this allows this IC to be used to construct a 3.6 large-current (5A) chopper regulator as if a 3-pin regula- tor were used. DC8