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2 LTC1873 (Note 1) Supply Voltage VCC........................................................................................... 7V BOOST n ............................................................... 15V BOOST n – SWn .................................................... 7V Input Voltage SW n .......................................................... – 1V to 8V VID n ....................................................... – 0.3V to 7V All Other Inputs ......................... – 0.3V to VCC + 0.3V Peak Output Current < 10 µs TG n, BGn ............................................................... 5A Operating Temperature Range (Note 2) ............................................. – 40 °C to 85°C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec).................. 300 °C ORDER PART NUMBER TJMAX = 125°C, θJA = 55°C/ W LTC1873EG Consult factory for Industrial and Military grade parts. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop VCC VCC Supply Voltage q 37 V PVCC PVCC Supply Voltage (Note 3) q 37 V BVCC BOOST Pin Voltage VBOOST – VSW (Note 3) q 2.7 7 V ICC VCC Supply Current Test Circuit 1 q 2.2 8 mA RUN/SS1 = RUN/SS2 = 0V (Note 6) q 30 100 µA IPVCC PVCC Supply Current Test Circuit 1 (Note 5) q 2.2 6 mA RUN/SS1 = RUN/SS2 = 0V (Note 6) q 6 100 µA IBOOST BOOST Pin Current Test Circuit 1 (Note 5) q 1.3 3 mA RUN/SS1 = RUN/SS2 = 0V q 0.1 10 µA VFB Feedback Voltage Test Circuit 1 q 0.790 0.800 0.810 V ∆VFB Feedback Voltage Line Regulation VCC = 3V to 7V q ±0.005 ±0.05 %/V IFB Feedback Current FB2 Only (Note 7) q ±0.001 ±1 µA VFCB FCB Threshold q 0.75 0.8 0.85 V ∆VFCB FCB Feedback Hysteresis 20 mV IFCB FCB Pin Current q ±0.001 ±1 µA VRUN RUN/SS Pin RUN Threshold q 0.45 0.55 0.65 V ISS Soft Start Source Current RUN/SS n = 0V – 1.5 – 3.5 – 5.5 µA The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VCC = 5V unless otherwise specified. (Note 4) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TOP VIEW G PACKAGE 28-LEAD PLASTIC SSOP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PVCC BOOST1 BG1 TG1 SW1 IMAX1 FCB RUN/SS1 COMP1 SGND FB1 SENSE VID0 VID1 IMAX2 BOOST2 BG2 TG2 SW2 PGND FAULT RUN/SS2 COMP2 FB2 VCC VID4 VID3 VID2 ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO ELECTRICAL CHARACTERISTICS |
