LTC3770EG

The LTC3770EG is a synchronous step-down switching regulator controller with output voltage up/down tracking capability and voltage margining.Its advanced functions and high accuracy reference are ideal for powering high performance server, ASIC and computer memory systems.

Features of the LTC3770EG are:(1)wide VIN range: 4V to 32V;(2)±0.67% 0.6V reference voltage;(3)output voltage tracking capability;(4)programmable margining;(5)sense resistor optional;(6)true current mode control;(7)2% to 90% duty cycle at 200kHz;(8)tON(MIN) 100ns;(9)phase lock loop frequency synchronization;(10)powerful dual N-channel MOSFET driver;(11)adjustable cycle-by-cycle current limit;(12)adjustable switching frequency;(13)programmable soft-start;(14)current foldback protection (disabled at start-up);(15)output overvoltage protection;(16)micropower shutdown: IQ < 30µA;(17)power good output voltage monitor tracks the reference input pin;(18)available in (5mm * 5mm) QFN and 28-lead SSOP packages.Applications of the LTC3770EG are:(1)distributed power systems;(2)server power supply.

The absolute maximum ratings of the LTC3770EG can be summarized as:(1):the parameter is input supply voltage (VIN, VINSNS),the rating is 32 to -0.3,the unit is V;(2):the parameter is boosted topside driver supply voltage,the rating is 38 to -0.3,the unit is V;(3):the parameter is SENSE+, SW voltage,the rating is 32 to -5,the unit is V;(4):the parameter is DRVCC, (BOOST SW) voltages,the rating is 7 to -0.3,the unit is V;(5):the parameter is VON, VRNG, PGOOD voltages,the rating is INTVCC+0.3 to -0.3,the unit is V;(6):the parameter is PLLFLTR, ITH, VFB, VREFIN voltages,the rating is 2.7 to -0.3,the unit is V;(7):the parameter is TRACK/SS, FCB, Z0, Z1, Z2, RUN, PLLIN, MARGIN0,MARGIN1 voltages,the rating is INTVCC+0.3 to 0.3,the unit is V;(8):the parameter is INTVCC, ZVIN voltages,the rating is 7 to -0.3,the unit is V;(9):the parameter is TG, BG, INTVCC peak currents,the rating is 4,the unit is A;(10):the parameter is TG, BG, INTVCC RMS currents,the rating is 50,the unit is mA;(11):the parameter is operating ambient temperature range,the rating is -40 to 85,the unit is ;(12):the parameter is junction temperature,the rating is 125,the unit is ;(13):the parameter is storage temperature range,the rating is -65 to +150,the unit is ;(14):the parameter is QFN reflow peak body temperature,the rating is 245,the unit is ;(15):the parameter is lead temperature (soldering, 10 sec),the rating is 300,the unit is .