LT3740 ABSOLUTE MAXIMUM RATINGSPIN CONFIGURATION(Note 1) SN–, BGATE, V TOP VIEW C, FB, XREF, PGOOD Voltages ...10V VIN, SHDN, SW, Range Voltages ...22V SN– 1 16 VC BIAS, TGATE, BGDP, SN+ Voltages ..32V PGND 2 15 FB SWB Voltage ..36V BGATE 3 14 XREF Maximum Junction Temperature... 125°C BGDP 4 13 SHDN 17 Operating Temperature Range (Note 2)..–40°C to 85°C SN+ 5 12 PGOOD SW 6 11 RANGE Storage Temperature Range ...–65°C to 125°C TGATE 7 10 VIN BIAS 8 9 SWB DHC PACKAGE 16-LEAD (5mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 43°C/W EXPOSED PAD IS GND (PIN 17), MUST BE SOLDERED TO PCB ORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGE LT3740EDHC#PBF LT3740EDHC#TRPBF 3740 16-Lead (5mm × 3mm) Plastic DFN –40°C to 85°C LEAD BASED FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGE LT3740EDHC LT3740EDHC#TR 3740 16-Lead (5mm × 3mm) Plastic DFN –40°C to 85°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/ ELECTRICAL CHARACTERISTICSThe l denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C, VIN = 5V unless otherwise noted. (Note 2)PARAMETERCONDITIONSMINTYPMAXUNITS Minimum Operation Voltage ● 2.2 V Maximum Operation Voltage ● 22 V Input Supply Current SHDN = 0V 0.6 μA SHDN = 5V, BIAS = 14V, FB = 1.5V 2.5 mA Feedback Reference Voltage XREF=1V ● 794 800 808 mV Feedback Voltage Line Regulation VIN = 2.5V to 22V 0.006 % FB Pin Input Current FB = 800mV 230 nA Error Amplifi er Transconductance VC = 1.2V 380 μS Controller Switching Frequency ● 260 300 330 kHz Minimum BGATE On Time (Note 3) 500 700 ns Current Limit RANGE = 0V 25 50 85 mV RANGE = Open 55 80 115 mV RANGE = VIN 80 105 140 mV Reverse Current Limit 35 mV 3740fc 2
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