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features ：

high efficiency: up to 92%

 

1.2mhz constant switching frequency

 

3.3v output voltage at iout=100ma from a single aa cell; 3.3v output voltage at iout=400ma  from two aa cells low start-up voltage: 0.85v

integrated main switch and synchronous

rectifier no schottky diode required

2.5v to 5v output voltage range

automatic pulse skipping mode operation

 

tiny external components

 

<1 μa shutdown current

 

anti-ringing control reduces emi

space saving 6-pin thin sot23 package

 

general description

the hs601 is a 1.2mhz constant frequency, current mode pwm step-up converter. it can supply 3.3v output voltage at 100ma from a single aa cell. the device integrates a main switch and a synchronous rectifier for high efficiency without an external  schottky diode. a switching frequency of 1.2mhz allows the use of tiny, low profile inductors and

ceramic capacitors. the current mode pwm operation with internal compensation provides excellent line and load transient characteristics. the hs601 features pulse skipping mode operation at light loads to avoid unacceptable ripple voltage.

the hs6601is offered in a low profile (1 mm) small

6-pin sot23 package.

 

applications

 

cellular and smart phones

 

microprocessors and dsp core supplies

 

wireless and dsl modems

 

mp3 player

 

digital still and video cameras