Datasheet LT3476 (Analog Devices) - 2

LT3476
Absolute MAxiMuM rAtings pin conFigurAtion (Note 1)
V TOP VIEW IN ..16V PWM1-4, SHDN ..16V SW1-4, LED1-4, CAP1-4 ...36V VC2 V ADJ1 V ADJ2 PWM1 PWM2 V IN NC 38 37 36 35 34 33 32 REF, RT, VADJ1-4, VC1-4 ..2V VC1 1 31 NC Operating Junction Temperature Range LED1 2 30 NC (Notes 2 and 3) .. –40°C to 125°C CAP1 3 29 SW1 Maximum Junction Temperature .. 125°C CAP2 4 28 SW1 Storage Temperature Range .. –65°C to 125°C LED2 5 27 SW2 Lead Temperature (Soldering, 10 sec) ...300°C RT 6 39 26 SW2 GND REF 7 25 SW3 LED3 8 24 SW3 CAP3 9 23 SW4 CAP4 10 22 SW4 LED4 11 21 NC VC4 12 20 NC 13 14 15 16 17 18 19 VC3 NC V ADJ4 V ADJ3 PWM4 PWM3 SHDN UHF PACKAGE 38-LEAD (5mm × 7mm) PLASTIC QFN TJMAX = 125°C, θJA = 34°C/W, θJC = 2°C/W EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
orDer inForMAtion LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3476EUHF#PBF LT3476EUHF#TRPBF 3476 38-Lead (5mm × 7mm) Plastic QFN –40°C to 85°C LT3476IUHF#PBF LT3476IUHF#TRPBF 3476 38-Lead (5mm × 7mm) Plastic QFN –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3476EUHF LT3476EUHF#TR 3476 38-Lead (5mm × 7mm) Plastic QFN –40°C to 85°C LT3476IUHF LT3476IUHF#TR 3476 38-Lead (5mm × 7mm) 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/
electricAl chArActeristics The
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denotes the specifications which apply over the full operating temperature range, (Note 3) otherwise specifications are at TA = 25°C. SW1-4 = 5V, VIN = 3.3V, SHDN = 3.3V, RT = 21k to GND, PWM1-4 = 3.3V, VADJ1-4 = REF, CAP1-4 = 5V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Range 2.8 16 V Full-Scale LED Current Monitor Threshold Over CAP1-4/LED1-4 Operating Range 102 105 107 mV l 100 108 mV One-Tenth Scale LED Current Monitor Threshold VADJ1-4 = 100mV 8 12 16 mV CAP1-4/LED1-4 Operating Range 2.2 33.5 V REF Output Voltage 10µA ≥ IREF ≥ –200µA l 1.032 1.050 1.063 V 3476fb 2 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts