Datasheet LTC3870-1 (Analog Devices) - 2

LTC3870-1
absoluTe MaxiMuM raTings pin conFiguraTion (Note 1)
V TOP VIEW IN ... –0.3V to 65V VCC0, VCC1 .. –0.3V to 6V ISENSE0+, ISENSE0−, ISENSE1+, ISENSE1− ... –0.3V to 15V MODE0 I TH0 FREQ FAULT0 FAULT1 PWM0 INTV 24 23 22 21 20 19 CC, RUN0/RUN1 .. –0.3V to 6V + EXTV ISENSE0 1 18 VCC0 CC .. –0.3V to 14V – MODE0/MODE1, ISENSE0 2 17 VIN RUN0 3 25 16 GND FREQ, PHASMD, ILIM ..–0.3V to INTVCC GND RUN1 4 15 EXTVCC FAULT0/FAULT1, ITH0/ITH1, SYNC .. –0.3V to 3.6V I – SENSE1 5 14 INTVCC INTV + CC, EXTVCC Peak Current (Note 7) ...100mA ISENSE1 6 13 VCC1 Operating Junction 7 8 9 10 11 12 Temperature Range .. –40°C to 125°C I TH1 I LIM Storage Temperature Range .. –65°C to 150°C SYNC MODE1 PWM1 PHASMD UF PACKAGE 24-LEAD (4mm × 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 46.9°C/W, θJC_BOT = 4.5°C/W EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3870EUF-1#PBF LTC3870EUF-1#TRPBF 38701 24-Lead (4mm × 4mm) Plastic QFN –40°C to 125°C LTC3870IUF-1#PBF LTC3870IUF-1#TRPBF 38701 24-Lead (4mm × 4mm) 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. 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.
e lecTrical characTerisTics The
l
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 1.1 mA Normal Operation VRUN0, VRUN1 = 3.3V 2.6 mA VUVLO Undervoltage Lockout Threshold VINTVCC Falling 3.7 V when VIN > 4.2V VINTVCC Rising 4.0 V
CONTROL LOOP
IISENSE0+, Current Sense + Pin Current VISENSE0,1+ = 3.3V l ±0.1 ±1 µA IISENSE1+ IISENSE0–, Current Sense – Pin Current VISENSE0,1– = 3.3V l ±0.1 ±1 µA IISENSE1– 38701f 2 For more information www.linear.com/LTC3870-1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts