Datasheet LTC3728L, LTC3728LX (Analog Devices) - 2

LTC3728L/LTC3728LX
absoluTe MaxiMuM raTings (Note 1)
Input Supply Voltage (VIN) .. 30V to –0.3V ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ... 2.7V to –0.3V Topside Driver Voltages Peak Output Current <10µs (TG1, TG2, BG1, BG2) .. 3A (BOOST1, BOOST2) .. 36V to –0.3V INTVCC Peak Output Current ... 40mA Switch Voltage (SW1, SW2) .. 30V to –5V Operating Temperature Range (Note 7) INTVCC, EXTVCC, RUN/SS1, RUN/SS2, LTC3728LC/LTC3728LXC .. 0°C to 85°C (BOOST1-SW1), (BOOST2-SW2), PGOOD .. 7V to –0.3V LTC3728LE/LTC3728LI .. –40°C to 85°C SENSE1+, SENSE2+, SENSE1–, Junction Temperature (Note 2) .. 125°C SENSE2– Voltages .. (1.1)INTVCC to –0.3V Storage Temperature Range .. –65°C to 125°C PLLIN, PLLFLTR, FCB Voltages .. INTVCC to –0.3V Reflow Peak Body Temperature (UH Package) ... 260°C Lead Temperature (Soldering, 10 sec) (GN Package) ..300°C
pin conFiguraTion
TOP VIEW TOP VIEW – + RUN/SS1 1 28 PGOOD SENSE1+ 2 27 TG1 NC SENSE1 SENSE1 NC RUN/SS1 PGOOD TG1 SW1 SENSE1– 3 26 SW1 32 31 30 29 28 27 26 25 V 4 25 VOSENSE1 1 24 BOOST1 OSENSE1 BOOST1 PLLFLTR 2 23 V PLLFLTR 5 24 V IN IN PLLIN 3 22 BG1 PLLIN 6 23 BG1 FCB 4 21 EXTVCC FCB 7 22 EXTVCC 33 ITH1 5 20 INTVCC I 8 21 TH1 INTVCC SGND 6 19 PGND SGND 9 20 PGND 3.3VOUT 7 18 BG2 3.3V 10 19 OUT BG2 ITH2 8 17 BOOST2 I 11 18 TH2 BOOST2 9 10 11 12 13 14 15 16 V 12 17 OSENSE2 SW2 – + NC TG2 NC SENSE2– 13 16 TG2 SW2 SENSE2+ 14 15 RUN/SS2 V OSENSE2 SENSE2 SENSE2 RUN/SS2 UH PACKAGE GN PACKAGE 32-LEAD (5mm × 5mm) PLASTIC QFN 28-LEAD NARROW PLASTIC SSOP TJMAX = 125°C, θJA = 34°C/W TJMAX = 125°C, θJA = 95°C/W EXPOSED PAD IS SGND (PIN 33), MUST BE SOLDERED TO PCB 3728lxff 2 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 Applications Package Description Revision History Typical Application Related Parts