Datasheet LTC7149 (Analog Devices) - 2

LTC7149 ABSOLUTE MAXIMUM RATINGS
(Note 1)
V − IN Voltage* (Note 3) .. 64V to –0.3V RT, PGDFB, ITH, VINREG ...INTVCC +0.3V to (SVOUT –0.3V) ISET Voltage* ... VIN to –0.3V EXTVCC Voltage* ... 28V to –0.3V GND Voltage* ... 28V to –0.3V Operating Junction RUN Voltage* ...64V to GND –0.3V Temperature Range (Notes 4, 6) .. –40°C to 125°C MODE/SYNC, PGOOD Voltage* ..GND + 6V to GND –0.3V Storage Temperature Range .. –65°C to 125°C VOUTSNS Voltage*... VIN to –0.3V *All voltage referenced to VOUT –, unless otherwise specified. PIN CONFIGURATION TOP VIEW TOP VIEW – – – V – 1 28 OUT SW V OUT V OUT V OUT SW SW SW V – 2 27 OUT SW 28 27 26 25 24 23 V – 3 26 OUT SW V – OUT 1 22 SW V – 4 25 OUT SW V – OUT 2 21 SW V – 5 24 SW V OUT IN 3 20 SW V 6 23 SW V IN IN 4 29 19 SW SV V 7 22 SW RUN 5 OUT– 18 BOOST IN 29 – RUN 8 SVOUT 21 BOOST GND 6 17 INTVCC MODE/SYNC 7 16 GND 9 INTV EXTV 20 CC CC PGOOD 8 15 ITH MODE/SYNC 10 19 EXTVCC 9 10 11 12 13 14 PGOOD 11 18 ITH – R T PGDFB 12 17 ISET OUT ISET – PGDFB SVOUT 13 16 V SV V INREG OUTSNS V OUTSNS VINREG 14 15 R UFD PACKAGE T 28-LEAD (4mm × 5mm) PLASTIC QFN FE PACKAGE 28-LEAD PLASTIC TSSOP T JMAX = 125°C, θJA = 43°C/W, θJC = 3.4°C/W EXPOSED PAD (PIN 29) IS SV – T OUT , MUST BE SOLDERED TO PCB JMAX = 125°C, θJA = 30°C/W, θJC = 5°C to 10°C/W EXPOSED PAD (PIN 29) IS SV – OUT , MUST BE SOLDERED TO PCB ORDER INFORMATION
http://www.linear.com/product/LTC7149#orderinfo LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC7149EUFD#PBF LTC7149EUFD#TRPBF 7149 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LTC7149IUFD#PBF LTC7149IUFD#TRPBF 7149 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LTC7149EFE#PBF LTC7149EFE#TRPBF LTC7149 28-Lead Plastic TSSOP –40°C to 125°C LTC7149IFE#PBF LTC7149IFE#TRPBF LTC7149 28-Lead Plastic TSSOP –40°C to 125°C Consult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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//. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. 7149fa 2 For more information www.linear.com/LTC7149