LTC4040 absoluTe MaxiMuM raTingspin conFiguraTion(Notes 1, 2) VIN (Transient) t < 1ms, Duty Cycle < 1% .. –0.3V to 7V TOP VIEW VIN (Steady State), BAT, CLN, VSYS, V SYS BAT SW SW PF0 BSTFB, NTC, OVSNS, 24 23 22 21 20 CHRG, PFO, RST, FAULT ... –0.3V to 6V VSYS 1 19 PFI PROG 2 18 BSTFB F0, F1, F2, BSTOFF, RSTFB, CLPROG 3 17 NTC PFI, CHGOFF ..–0.3V to Max (V 25 IN, VBAT, VSYS) + 0.3V CHGOFF 4 GND 16 OVSNS IOVSNS ..±10mA BSTOFF 5 15 IGATE ICHRG, IPFO, IRST, IFAULT ..10mA VIN 6 14 F0 I CLN 7 13 F1 PROG, ICLPROG... 1.1mA 8 9 10 11 12 Operating Junction Temperature Range F2 (Note 3) .. –40 to 125°C RST CHRG FAULT RSTFB Storage Temperature Range ..–65 to 125°C UFD PACKAGE 24-LEAD (4mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 43°C/W EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB orDer inForMaTion http://www.linear.com/product/LTC4040#orderinfoLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGE LTC4040EUFD#PBF LTC4040EUFD#TRPBF 4040 24-Lead (4mm × 5mm × 0.75mm) Plastic QFN –40°C to 125°C LTC4040IUFD#PBF LTC4040IUFD#TRPBF 4040 24-Lead (4mm × 5mm × 0.75mm) 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/. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. 4040fb 2 For more information www.linear.com/LTC4040 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 Application Package Description Revision History Typical Application Related Parts