需要1a 及以下,可以看ps7516 。        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 toonly 6. an internal 0.6v voltage is connected toerror amplifier the non-inverting input as precision 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 to5.3v shutdown current: < 1ua oscillator frequency: 500khz reference