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LTC3872 Datasheet(PDF) 2 Page - Linear Technology |
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LTC3872 Datasheet(HTML) 2 Page - Linear Technology |
2 / 20 page LTC3872 2 3872fa Input Supply Voltage (VIN), RUN/SS .......... –0.3V to 10V IPRG Voltage..................................–0.3V to (VIN + 0.3V) VFB, ITH Voltages....................................... –0.3V to 2.4V SW Voltage ................................................ –0.3V to 60V (Note 1) The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range ● 2.75 9.8 V Input DC Supply Current Normal Operation Shutdown UVLO Typicals at VIN = 4.2V (Note 4) 2.75V ≤ VIN ≤ 9.8V, VITH = 1.3V VRUN/SS = 0V VIN < UVLO Threshold, VRUN = 0V 250 8 20 400 20 35 μA μA μA Undervoltage Lockout Threshold VIN Rising VIN Falling ● ● 2.3 2.05 2.45 2.3 2.75 2.55 V V Shutdown Threshold (at RUN/SS) VRUN/SS Falling VRUN/SS Rising ● 0.6 0.7 0.85 0.95 1.05 1.15 V Regulated Feedback Voltage (Note 5) ● 1.182 1.2 1.218 V Feedback Voltage Line Regulation 2.75V < VIN < 9V (Note 5) 0.14 mV/V Feedback Voltage Load Regulation VITH = 1.6V (Note 5) VITH = 1V (Note 5) 0.05 –0.05 % % VFB Input Current (Note 5) 25 50 nA RUN/SS Pull Up Current VRUN/SS = 0 0.35 0.7 1.25 μA ELECTRICAL CHARACTERISTICS ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO IPRG 1 ITH 2 VFB 3 GND 4 8 SW 7 RUN/SS 6 VIN 5 NGATE TOP VIEW TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 230°C/W TOP VIEW 9 DDB PACKAGE 8-LEAD (3mm × 2mm) PLASTIC DFN 5 6 7 8 4 3 2 1 GND VFB ITH IPRG NGATE VIN RUN/SS SW TJMAX = 125°C, θJA = 76°C/W EXPOSED PAD (PIN 9) IS GND MUST BE SOLDERED TO PCB ORDER PART NUMBER TS8 PART MARKING ORDER PART NUMBER DDB PART MARKING LTC3872ETS8 LCGB LTC3872EDDB LCHT Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges. Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) ............................. 125°C Storage Temperature Range................... –65°C to 125°C Lead Temperature (Soldering, 10 sec) TS8 Package ......................................................... 300°C |
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