MAX717ESE

The MAX717ESE CMOS power-supply ICs create dual,regulated DC outputs for small,battery-operated micropocessor systems.Each device generates a main output (3V or 5V,selectable) and an auxiliary output for flash memory or PCMCIA(5V or 12V,selectable).

Features of the MAX717ESE are:(1)low 0.9V to 5.5V battery operating range;(2)unregulated 7V to 20V DC input range;(3)dual regulated outputs main output:3.3V/5V,auxiliary output:5V/12V;(4)87% efficiency at 200mA;(5)efficiency PRAM keep-alive:80% at 1mA;(6)8W/in3 power density;(7)60A quiescent current;(8)500kHz maximum switching frequency;(9)±1.5% VREF tolerance over temp;(10)detect output power failures;(11)detect prescence of AC power;(12)16-pin narrow SO packages.Applications of the MAX717ESE are:(1)palmtop computers;(2)flash-memory/PCMCIA power supplies;(3)portable data-collection equipment;(4)medical instrumentation;(5)portable data communicators.

The absolute maximum ratings of the MAX717ESE can be summarized as:(1):the parameter is supply voltage(V+ to GND),the rating is +7,-0.3,the unit is V;(2):the parameter is switch voltage,the rating is +7,-0.3,the unit is V;(3):the parameter is linear-regulator voltage(LIN to GND),the rating is +20,-0.3,the unit is V;(4):the parameter is feedback voltage(FB12 to GND),the rating is +13,-0.3,the unit is V;(5):the parameter is auxiliary  pin voltages,the rating is -0.3 to V++0.3,the unit is V;(6):the parameter is ground voltage difference (AGND to GND),the rating is ±0.3,the unit is V;(7):the parameter is reference current(IVREF),the rating is 2.5,the unit is mA;(8):the parameter is continuous power dissipation up to +70,the rating is 696,the unit is mW;(9):the parameter is continuous power dissipation derate above  +70,the rating is 8.70,the unit is mW/;(10):the parameter is operating temperature range,the rating is,-40 to +85,the unit is ;(11):the parameter is junction temperature,the rating is +150,the unit is ;(12):the parameter is storage temperature range,the rating is -65 to +160,the unit is ;(13):the parameter is lead temperature (soldering,10 sec),the rating is +300,the unit is .