LTC3708 ABSOLUTE MAXIMUM RATINGSPIN CONFIGURATION(Note 1) Input Supply Voltage (V TOP VIEW CC, DRVCC) ... 7V to –0.3V + Boosted Topside Driver Supply Voltage BOOST1, 2 .. 42V to –0.3V V RNG1 FCB PGOOD I ON1 BOOST1 TG1 SW1 SENSE1 32 31 30 29 28 27 26 25 Switch Voltage (SW1, 2) .. 36V to –5V RUN/SS 1 24 SENSE1– SENSE1+, SENSE2+ Voltages .. 36V to –5V ITH1 2 23 PGND1 SENSE1–, SENSE2– Voltages .. 10V to –0.3V VFB1 3 22 BG1 ION1, ION2 Voltages .. 21V to –0.3V TRACK1 4 21 DRVCC 33 (BOOST – SW) Voltages .. 7V to –0.3V SGND 5 20 BG2 RUN/SS, PGOOD Voltages .. 7V to –0.3V TRACK2 6 19 PGND2 PGOOD DC Current ... 5mA VFB2 7 18 SENSE2– ITH2 8 17 VCC TRACK1, TRACK2 Voltages ..VCC + 0.3V to –0.3V 9 10 11 12 13 14 15 16 VRNG1, VRNG2 Voltages.. VCC + 0.3V to –0.3V + I TG2 TH1, ITH2 Voltages ... 2.7V to –0.3V SW2 EXTLPF INTLPF V RNG2 I ON2 BOOST2 V SENSE2 FB1, VFB2 Voltages .. 2.7V to –0.3V UH PACKAGE INTLPF, EXTLPF Voltages .. 2.7V to –0.3V 32-LEAD (5mm × 5mm) PLASTIC QFN FCB Voltages ... 7V to –0.3V TJMAX = 125°C, θJA = 34°C/W EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB Operating Temperature Range (Note 5) ...–40°C to 85°C Junction Temperature (Note 2) ... 125°C Storage Temperature Range .. –65°C to 125°C Reflow Peak Body Temperature ... 260°C ORDER INFORMATION http://www.linear.com/product/LTC3708#orderinfoLEAD FREE FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGE LTC3708EUH#PBF LTC3708EUH#TRPBF 3708 32-Lead (5mm × 5mm) Plastic QFN –40°C to 85°C LEAD BASED FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGE LTC3708EUH LTC3708EUH#TR 3708 32-Lead (5mm × 5mm) Plastic QFN –40°C to 85°C Consult LTC Marketing for parts specified 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 specifications, go to: http://www.linear.com/tapeandreel/ . Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. 3708fc 2 For more information www.linear.com/LTC3708 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Typical Application Related Parts