Datasheet LTC3870 (Analog Devices) - 2

LTC3870
absoluTe MaxiMuM raTings pin conFiguraTion (Note 1)
VIN ... –0.3V to 65V TOP VIEW BOOST0, BOOST1 ...–0.3V to 71V SW0, SW1 .. –5V to 65V I TH0 FREQ FAULT0 FAULT1 TG0 SW0 I + − + – 28 27 26 25 24 23 SENSE0 , ISENSE0 , ISENSE1 , ISENSE1 ..–0.3V to 15V MODE0 1 22 BOOST0 (BOOST0-SW0), (BOOST1-SW1) ... –0.3V to 6V I + SENSE0 2 21 BG0 INTVCC, RUN0/RUN1 ... –0.3V to 6V I – SENSE0 3 20 VIN EXTVCC .. –0.3V to 14V RUN0 4 29 19 PGND MODE0/MODE1, FREQ, PHASMD, I SGND LIM ...–0.3V to INTVCC RUN1 5 18 EXTVCC FAULT0/FAULT1, I I – SENSE1 6 17 INTV TH0/ITH1, SYNC .. –0.3V to 3.6V CC INTV I + SENSE1 7 16 BG1 CC, EXTVCC Peak Current (Note 9) ...100mA Operating Junction Temperature Range MODE1 8 15 BOOST1 9 10 11 12 13 14 .. –40°C to 125°C Storage Temperature Range .. –65°C to 150°C I TH1 I LIM TG1 SYNC SW1 PHASMD UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 43°C/W, θJC_BOT = 3.4°C/W EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
orDer inForMaTion LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3870EUFD#PBF LTC3870EUFD#TRPBF 3870 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LTC3870IUFD#PBF LTC3870IUFD#TRPBF 3870 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. 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/
e lecTrical characTerisTics The
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denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 2) VIN = 15V, VRUN0,VRUN1 = 3.3V, fSYNC = 350kHz (externally driven) unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range (Note 3) 4.5 60 V VOUT Output Voltage Range (Note 4) 0.5 14 V IQ Input Voltage Supply Current VRUN0,VRUN1 = 0V (Note 5) 1.1 mA Normal Operation VRUN0,VRUN1 = 3.3V, No Caps on TG and BG 2.6 mA VUVLO Undervoltage Lockout Threshold VINTVCC Falling 3.7 V When VIN > 4.2V VINTVCC Rising 4.0 V 3870fb 2 For more information www.linear.com/LTC3870