MAX771MJA

The MAX771MJA is designed as one kind of 5V/12V/15V or adjustable, high-efficiency, low IQ, step-up DC-DC controllers which provide 90% efficiency over a 10mA to 1A load.A unique current-limited pulse-frequency-modulation (PFM) control scheme gives these devices the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using less than 110A of supply current (vs. 2mA to 10mA for PWM converters).And it features an internal shunt regulator that allows unlimited higher input voltages for a wider input range and uses the step-up switching regulators with onboard MOSFETs.

Features of the MAX771MJA are:(1)90% efficiency for 10mA to 1A load currents;(2)up to 15W output power;(3)110A max supply current;(4)5A max shutdown current;(5)2V to 16.5V input range;(6)internal shunt regulator for high input voltages;(7)preset or adjustable output voltages;(8)current-limited PFM control scheme;(9)300kHz switching frequency.And it can be used in palmtops/handy-terminals,high-efficiency DC-DC converters,battery-powered applications,positive LCD-bias generators,portable communicators and flash memory programmers.

The absolute maximum ratings of the MAX771MJA can be summarized as:(1)V+ to GND:-0.3V to 17V;(2)V+ to SGND:-0.3V to 7V;(3)SGND:-0.3V to (V+ +0.3V);(4)EXT, CS, REF, LBO, LBI, SHDN, FB:-0.3V to (V+ +0.3V);(5)EXTH, EXTL:-0.3V to (V+ +0.3V);(6)lead temperature (soldering, 10sec):+300°C;(7)storage temperature range:-65°C to +160°C;(8)operating temperature ranges:-55°C to +125°C;(9)continuous power dissipation (TA=+70°C) 8-Pin plastic DIP (derate 9.09mW/°C above +70°C):727 mW;(10)continuous power dissipation (TA=+70°C) 8-Pin SO (derate 5.88mW/°C above +70°C):471 mW.If you want to know more information such as the electrical characteristics about it,please download the datasheet in www.seekic.com or www.chinaicmart.com .