MAX1577YETA

The MAX1577YETA charge pumps drive white LEDs, including camera strobes, with regulated current up to 1.2A (guaranteed to 800mA). The very low openloop output resistance allows high flash brightness,even from a low battery input voltage. The adaptive 1x/2x regulating charge-pump operation provides high efficiency (up to 92%) while in movie mode or backlighting.Fast (1MHz) switching allows the use of tiny external components.

Features of the MAX1577YETA are:(1)up to 1.2a output drive capability (800ma guaranteed);(2)up to 92% pled / pbatt efficiency for movie mode;(3)flexible brightness control two-bit logic for 100%, 33%, 20%, and off pwm for 20% to 100%;(4)3% current regulation over line and temperature;(5)current or voltage regulation for flash and backlighting ;(6)current regulation for flash ;(7)low ripple and emi;(8)2.7v to 5.5v supply voltage range;(9)soft-start limits inrush current;(10)output-voltage regulation mode;(11)thermal-shutdown protection;(12)8-pin 3mm x 3mm tdfn package.Applications of the MAX1577YETA are:(1)white led flashes, strobes, and movie lights;(2)lcd backlighting;(3)camera phones, cell phones, and smart phones;(4)pdas, digital cameras, and camcorders.

The absolute maximum ratings of the MAX1577YETA can be summarized as:(1):the parameter is IN, OUT, EN1, EN2 to GND,the rating is -0.3 to +6.0,the unit is V;(2):the parameter is OUT to GND During Shutdown,the rating is -0.3 to VIN+0.3,the unit is V;(3):the parameter is OUT to CS,the rating is -0.6 to +0.6,the unit is V;(4):the parameter is CS to GND,the rating is -0.3 to (VOUT + 0.3),the unit is V;(5):the parameter is CN to GND,the rating is -0.3 to (VIN + 0.3),the unit is V;(6):the parameter is CP to GND,the rating is 0.3 to the greater of (VOUT + 1) or (VIN + 1),the unit is V;(7):the parameter is OUT short circuit to GND,the rating is continuous;(8):the parameter is continuous power dissipation (TA = +70) 8-pin TDFN (derate 18.2mW/ above +70),the rating is 1455,the unit is mW;(9):the parameter is operating temperature range,the rating is -40 to +85,the unit is ;(10):the parameter is junction temperature,the rating is +150,the unit is ;(11):the parameter is storage temperature range,the rating is -65 to +150,the unit is ;(12):the parameter is lead temperature (soldering,10sec),the rating is +300,the unit is .