LT8640/LT8640-1 ABSOLUTE MAXIMUM RATINGSPIN CONFIGURATION(Note 1) VIN, EN/UV, PG ..42V TOP VIEW BIAS ..25V FB, TR/SS . ...4V SYNC/MODE Voltage . ..6V FB PG GND SYNC/MODE Operating Junction Temperature Range (Note 2) 20 19 18 17 LT8640E/LT8640-1E .. –40°C to 125°C BIAS 1 16 TR/SS LT8640I/LT8640-1I .. –40°C to 125°C INTVCC 2 15 RT LT8640J/LT8640-1J ... –40°C to 150°C BST 3 14 EN/UV LT8640H/LT8640-1H ... –40°C to 150°C 22 VIN1 4 13 V SW IN2 Storage Temperature Range ..–65 to 150°C 21 GND1 6 SW 11 GND2 7 8 9 10 SW SW GND1 GND2 UDC AND UDCF PACKAGES 18-LEAD (3mm × 4mm) PLASTIC QFN θJA = 40°C/W, θJC(PAD) = 12°C/W (Note 3) EXPOSED PAD (PINS 21, 22) ARE SW, SHOULD BE SOLDERED TO PCB NOTE: PINS 5 AND 12 ARE REMOVED. CONFIGURATION DOES NOT MATCH JEDEC 20-LEAD PACKAGE OUTLINE ORDER INFORMATION LEAD FREE FINISHTAPE AND REELPART MARKING* PACKAGE DESCRIPTIONTEMPERATURE RANGE LT8640EUDC#PBF LT8640EUDC#TRPBF LGNJ 18-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C LT8640IUDC#PBF LT8640IUDC#TRPBF LGNJ 18-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C LT8640HUDC#PBF LT8640HUDC#TRPBF LGNJ 18-Lead (3mm × 4mm) Plastic QFN –40°C to 150°C LT8640EUDC-1#PBF LT8640EUDC-1#TRPBF LGVT 18-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C LT8640IUDC-1#PBF LT8640IUDC-1#TRPBF LGVT 18-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C LT8640HUDC-1#PBF LT8640HUDC-1#TRPBF LGVT 18-Lead (3mm × 4mm) Plastic QFN –40°C to 150°C LT8640EUDCF#PBF LT8640EUDCF#TRPBF LHJK 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 125°C LT8640IUDCF#PBF LT8640IUDCF#TRPBF LHJK 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 125°C LT8640JUDCF#PBF LT8640JUDCF#TRPBF LHJK 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 150°C LT8640EUDCF-1#PBF LT8640EUDCF-1#TRPBF LHGX 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 125°C LT8640IUDCF-1#PBF LT8640IUDCF-1#TRPBF LHGX 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 125°C LT8640JUDCF-1#PBF LT8640JUDCF-1#TRPBF LHGX 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 150°C AUTOMOTIVE PRODUCTS** LT8640JUDCF#WPBF LT8640JUDCF#WTRPBF LHJK 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 150°C LT8640JUDCF-1#WPBF LT8640JUDCF-1#WTRPBF LHGX 18-Lead (3mm × 4mm) Plastic Side Wettable QFN –40°C to 150°C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. ** Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models. Rev. D 2 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts