Datasheet LT3745-1 (Analog Devices) - 2

LT3745-1
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
V TOP VIEW IN .. 57V TE CAP ... VIN – 8V to VIN I SET T SET V IN GA CAP ISP ISN FB SS RT GATE ..CAP to V 40 39 38 37 36 35 34 33 32 31 IN LED00 to LED15, ISP, ISN ...40V EN/UVLO 1 30 SYNC LED07 2 29 LED08 ISP ...ISN – 1V to ISN + 1V LED06 3 28 LED09 FB, RT, TSET, ISET ... 2V LED05 4 27 LED10 VCC ...–0.3V to 4V LED04 5 41 26 LED11 SCKI+, SCKI–, SCKO+, SCKO–, SDI+, SDI–, GND LED03 6 25 LED12 SDO+, SDO–, LDI, PWMCK+, PWMCK–, SYNC, LED02 7 24 LED13 SS, EN/UVLO ... –0.3V to V LED01 8 23 LED14 CC Operating Junction Temperature Range LED00 9 22 LED15 SCKI– 10 21 SCKO– (Notes 2, 3) 11 12 13 14 15 16 17 18 19 20 LT3745E-1 ...–40°C to 125°C + – + + – + – + LDI V CC LT3745I-1 ..–40°C to 125°C SCKI SDI SDI SDO SDO SCKO Storage Temperature Range ..–65°C to 125°C PWMCK PWMCK UJ PACKAGE 40-LEAD (6mm × 6mm) PLASTIC QFN TJMAX = 125°C, θJA = 34°C/W, θJC = 2.5°C/W EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3745EUJ-1#PBF LT3745EUJ-1#TRPBF LT3745UJ-1 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C LT3745IUJ-1#PBF LT3745IUJ-1#TRPBF LT3745UJ-1 40-Lead (6mm × 6mm) 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/
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VCC = 3.3V, VEN/UVLO = 1.5V, VFB = 1.5V, VISP = VISN = 0V, RT = 105k, RISET = 60.4k, CCAP = 0.47µF to VIN, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply
VIN VIN Operating Voltage l 6 55 V IVIN VIN Supply Current VEN/UVLO = 0V 0.2 2 µA No Switching 0.4 0.55 mA VCC VCC Operating Voltage l 3 3.6 V IVCC VCC Supply Current (Note 4) VEN/UVLO = 0V 0.25 mA LED Channel Off, 30MHz Data Off 11 mA LED Channel On, 30MHz Data Off 16 mA LED Channel On, 30MHz Data On 19 mA 37451f 2 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts