Micrel mic4576bt 200khz step down voltage regulator micrel mic4576wt 200khz voltage regulator adjustable output voltage 1 23v to 33v output voltage 2 voltage accuracy 8v to 36v supply voltage 200khz switching frequency 45 to 85 5 to 220 case the mic4576 is a series of easy to use adjustable bicmos step down buck switch mode voltage regulator requires minimum external components thermal shutdown overcurrent protection suitable for simple high efficiency step down buck regulat