The MIC3832 and MIC3833 are unique PWM controllersdesigned for current-fed, multiple-output or push-pull,switched-mode power supply applications.The MIC3832/3 features UVLO (undervoltage lockout) withhysteresis, soft start with a programmable time constant,cycle-by-cycle current limiting, a PWM latch to prevent mul-tiple outputs due to noise or ringing, and front-edge blanking.Current-fed topologies eliminate core saturation problemscaused by shoot through (cross conduction) of push-pullcircuits and reduce stress on the switching transistors.The MIC3832/3 has one PWM stage capable of operating upto 500kHz and two output stages, Q and Q, that operate atone-half of the system frequency at a fixed 50% duty cycle.The MIC3832 UVLO circuit permits startup when the supplyis above 15.9V and forces shutdown when the supply dropsbelow 9.8V. The MIC3833 starts up above 8.3V and shutsdown below 7.8V. An internal 22V zener diode provides lowpower overvoltage protection.The three output stages are totem-pole drivers capable of 1Apeak current to external power MOSFETs, BJTs, or IGBTs.The Q and Q outputs have an intentional 50ns overlap (nodead time).