Datasheet LTC3856 (Analog Devices) - 2

LTC3856
absoluTe MaxiMuM raTings (Note 1)
Input Supply Voltage (VIN) ... 40V to –0.3V ITH, VFB Voltages ... INTVCC to –0.3V Topside Driver Voltages (BOOSTn) .. 46V to –0.3V INTVCC Peak Output Current ..100mA Switch Voltage (SWn) ... 40V to –5V Operating Junction Temperature Range INTVCC, RUN, PGOOD, EXTVCC, (Notes 2, 3) .. –40°C to 125°C (BOOSTn – SWn) ... 6V to –0.3V Storage Temperature Range ... –65°C to 125°C SENSEn Voltages .. 5.5V to –0.3V Reflow Peak Body Temperature (UH Package) .. 260°C MODE, PLLIN, ILIM, TK/SS, AVP, Lead Temperature (Soldering, 10 sec.) FREQ, ISET Voltages ... INTVCC to –0.3V FE Package .. 300°C DIFFP, DIFFN, DIFFOUT, PHASMD, ITEMP Voltages ... INTVCC to –0.3V
pin conFiguraTion
TOP VIEW FREQ 1 38 PLLIN RUN 2 37 CLKOUT TOP VIEW SENSE1+ 3 36 SW1 – + SENSE1– 4 35 TG1 NC 5 34 NC SENSE1 SENSE1 RUN FREQ PLLIN CLKOUT SW1 TG1 TK/SS 6 33 BOOST1 32 31 30 29 28 27 26 25 VFB 7 32 PGND1 TK/SS 1 24 BOOST1 ITH 8 31 BG1 VFB 2 23 BG1 SGND 9 30 V ITH 3 22 V IN IN AVP 10 39 29 INTV AVP 4 21 INTV CC 33 CC SGND SGND/PGND ITEMP ITEMP EXTV 11 5 20 28 EXTV CC CC PHASMD 6 19 BG2 PHASMD 12 27 BG2 SENSE2+ 7 18 BOOST2 SENSE2+ 13 26 PGND2 SENSE2– 8 17 TG2 SENSE2– 14 25 NC 9 10 11 12 13 14 15 16 DIFFP 15 24 BOOST2 DIFFN 16 23 TG2 DIFFP DIFFN ISET ILIM MODE SW2 PGOOD DIFFOUT 17 22 SW2 DIFFOUT ISET 18 21 PGOOD UH PACKAGE ILIM 32-LEAD (5mm × 5mm) PLASTIC QFN 19 20 MODE TJMAX = 125°C, θJA = 34°C/W FE PACKAGE EXPOSED PAD (PIN 33) IS SGND/PGND, MUST BE SOLDERED TO PCB 38-LEAD PLASTIC TSSOP TJMAX = 125°C, θJA = 25°C/W EXPOSED PAD (PIN 39) IS SGND/PGND, MUST BE SOLDERED TO PCB 3856fa 2 For more information www.linear.com/LTC3856 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions FUNCTIONAL Diagram Operation Applications Information Typical Application Typical Application Related Parts