MAX751

The MAX751 is a +5V-output,CMOS,step-up,switch-mode DC-DC converter.Minimum input start-up voltage is 1.2V.From a 2.7V supply,the output current capability of MAX751 is guaranteed to be 150mA.Battery-saving features include 86% typical full-load efficiency,2mA operating quiescent supply current,and 35A shutdown supply current.

Features of the MAX751 are:(1)+5V preset output;(2)guaranteed 150mA output current;(3)1.2V start-up supply voltage;(4)86% typical efficiencies at full load;(5)small 22H inductor-no component design required;(6)2mA quiescent current;(7)35A logic-controlled shutdown mode;(8)overcurrent and soft-start protection;(9)170kHz high-frequency current-mode PWM;(10)8-pin DIP and SO package.Applications of the MAX751 are:(1)local +5V supply in +3V-only systems;(2)cellular phones;(3)RF transmitter supply;(4)palmtop and notebook computers;(5)battery-powered and hand-held instruments.

The absolute maximum ratings of the MAX751 can be summarized as:(1):the parameter is V+,LX to GND,the rating is -0.3 to +17,the unit is V;(2):the parameter is VOUT to GND,the rating is ±25,the unit is V;(3):the parameter is SS,CC,SHDN to GND,the rating is +0.3 to V++0.3,the unit is V;(4):the parameter is peak switch current(ILX),the rating is +1.5,the unit is A;(5):the parameter is reference current(IVREF),the rating is 2.5,the unit is mA;(6):the parameter is continuous power dissipation (TA=70) plastic DIP (derate 9.09mW/ above +70),the rating is 727,the unit is mW;(7):the parameter is continuous power dissipation (TA=70) wide SO (derate 5.88mW/ above +70),the rating is 471,the unit is mW;(8):the parameter is continuous power dissipation (TA=70) CERDIP (derate 8.00mW/ above +70),the rating is 644,the unit is mW;(9):the parameter is operating temperature range,the rating is,0 to +70,-40 to +85,-55 to +125,the unit is ;(10):the parameter is junction temperature,the rating is +150,+175,the unit is ;(11):the parameter is storage temperature range,the rating is -65 to +160,the unit is ;(12):the parameter is lead temperature (soldering,10 sec),the rating is +300,the unit is .