176 c to 85 176 c temperature range   applications   8226 battery-powered equipment   8226 portable media players   8226 industrial distributed power applications   8226 portable hand-held instruments   general description   the ps5401  device is high-efficiency synchronous step-grzq & & regulators. with a wide input range it is   suitable for a wide range of applications such aspower conditioning from unregulated sources. it features a low   rdson 500m300mtypical internal switch for maximum efficiency 92 typical . supports psm mode the   operating frequency is fixed at 800khz allowing the use of small external components while still being able to have   low output voltage ripple. with ovp function the ic can stand off input voltage

比较器在电流反向流动时迅速关闭mosfet 。ps5050-1/-q1 可连接5v 至75v 的电源，并能承受高达100v 的瞬态电压。the ps5050-1/- q1 high side or ing fet controller when used in conjunction with an external mosfet can serve asan ideal diode rectifier when connected in series with a power supply. the controller provides gate drive for the external n-channel mosfet through a built-in charge pump and uses a fast response comparator to quickly turn off the mosfet when current flows in reverse. ps5050-1/- q1 can be connected to a power supply ranging from 5v to 75v and

  the fp6277 is a current mode boost dc dc converter with pwm/psm control. its pwm circuitry with built-in 30m 937 high side switch and 30m 937 low side switch make this regulator highly power efficient. the internal compensation network also minimizes external component counts to only 6. an internal 0.6v voltage is connected to error amplifier the non-inverting input asprecision reference voltage. built-in soft-start function can reduce the inrush current. features 特点：current mode with pwm/psm control input voltage range: 2.4v 4.5v adjustable output up to 5.3v shutdown current: < 1ua oscillator frequency: 500khz reference voltage: 0.6v /-2 disconnect load during shutdown cycle-by-cycle current limit low rds