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LTC3728LXCUH Datasheet(PDF) 2 Page - Linear Technology |
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LTC3728LXCUH Datasheet(HTML) 2 Page - Linear Technology |
2 / 32 page 2 LTC3728L/LTC3728LX 3728lxfa Input Supply Voltage (VIN)........................ 30V to –0.3V Top Side Driver Voltages (BOOST1, BOOST2) .................................. 36V to – 0.3V Switch Voltage (SW1, SW2) ........................ 30V to – 5V INTVCC, EXTVCC, RUN/SS1, RUN/SS2, (BOOST1-SW1), (BOOST2-SW2), PGOOD ............................ 7V to – 0.3V SENSE1+, SENSE2 +, SENSE1–, SENSE2 – Voltages ....................... (1.1)INTVCC to –0.3V PLLIN, PLLFLTR, FCB, Voltage ........... INTVCC to –0.3V ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ...2.7V to –0.3V Peak Output Current <10 µs (TG1, TG2, BG1, BG2) .. 3A INTVCC Peak Output Current ................................ 40mA Operating Temperature Range (Note 7) LTC3728LC/LTC3728LXC ....................... 0 °C to 85°C LTC3728LE ........................................ – 40 °C to 85°C Junction Temperature (Note 2) ............................ 125 °C Storage Temperature Range ................ – 65 °C to 125°C Reflow Peak Body Temperature (UH Package) .... 260 °C Lead Temperature (Soldering, 10 sec) (GN Package) ................................................... 300 °C 32 31 30 29 28 27 26 25 9 10 11 12 13 TOP VIEW 33 14 15 16 17 18 19 20 21 22 23 24 8 7 6 5 4 3 2 1 VOSENSE1 PLLFLTR PLLIN FCB ITH1 SGND 3.3VOUT ITH2 BOOST1 VIN BG1 EXTVCC INTVCC PGND BG2 BOOST2 UH PACKAGE 32-LEAD (5mm × 5mm) PLASTIC QFN ORDER PART NUMBER LTC3728LCUH LTC3728LEUH LTC3728LXCUH TJMAX = 125°C, θJA = 34°C/W EXPOSED PAD IS SGND (PIN 33), MUST BE SOLDERED TO PCB The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops VOSENSE1, 2 Regulated Feedback Voltage (Note 3); ITH1, 2 Voltage = 1.2V (LTC3728LC) q 0.792 0.800 0.808 V (Note 3); ITH1, 2 Voltage = 1.2V (LTC3728LE/LTC3728LX) q 0.788 0.800 0.812 V IVOSENSE1, 2 Feedback Current (Note 3) – 5 – 50 nA VREFLNREG Reference Voltage Line Regulation VIN = 3.6V to 30V (Note 3) 0.002 0.02 %/V VLOADREG Output Voltage Load Regulation (Note 3) Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V q 0.1 0.5 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 2.0V q – 0.1 – 0.5 % gm1, 2 Transconductance Amplifier gm ITH1, 2 = 1.2V; Sink/Source 5uA; (Note 3) 1.3 mmho Consult LTC Marketing for parts specified with wider operating temperature ranges. UH PART MARKING 3728L 3728LE 3728LX ORDER PART NUMBER LTC3728LCGN LTC3728LEGN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TOP VIEW GN PACKAGE 28-LEAD NARROW PLASTIC SSOP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 RUN/SS1 SENSE1+ SENSE– VOSENSE1 PLLFLTR PLLIN FCB ITH1 SGND 3.3VOUT ITH2 VOSENSE2 SENSE2– SENSE2+ PGOOD TG1 SW1 BOOST1 VIN BG1 EXTVCC INTVCC PGND BG2 BOOST2 SW2 TG2 RUN/SS2 TJMAX = 125°C, θJA = 95°C/W |
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