LTC4125 absoluTe MaxiMuM raTingspin conFiguraTion(Note 1) IN, IS–, CTD ... –0.3V to 6V TOP VIEW IN1, IN2, IS+ ... –0.3V to VIN + 0.3V DTH, FTH, PTHM, FB ... –0.3V to VIN + 0.3V IN1 SW1 SW2 IN2 NTC, EN, PTH1, PTH2, CTS.. –0.3V to V 20 19 18 17 IN + 0.3V IMON .. –0.3V to MIN(V IN 1 16 GND IN, VIS+, VIS–) + 0.3V STAT ... –0.3V to V CTS 2 15 EN IN + 0.3V IS– 3 14 CTD STAT ..–1mA to 2mA 21 IS+ 4 GND 13 FB Operating Junction Temperature Range IMON 5 12 PTHM (Note 2) ... –40°C to 125°C NTC 6 11 PTH1 Storage Temperature Range .. –65°C to 150°C 7 8 9 10 DTH STAT FTH PTH2 UFD20 PACKAGE 20-LEAD (4mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 43°C/W EXPOSED PAD (PIN 21) MUST BE CONNECTED TO GND orDer inForMaTion LEAD FREE FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGE LTC4125EUFD#PBF LTC4125EUFD#TRPBF 4125 20-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LTC4125IUFD#PBF LTC4125IUFD#TRPBF 4125 20-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. 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. 4125f 2 For more information www.linear.com/LTC4125 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
