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LT3476
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
V IN ............................................................................16V
PWM1-4, SHDN ........................................................16V
SW1-4, LED1-4, CAP1-4 ...........................................36V
REF, RT, V ADJ1-4 , VC1-4 ..............................................2V
Operating Junction Temperature Range
(Notes 2 and 3) ...................................... –40°C to 125°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range .................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec)................... 300°C
VC1 1
LED1 2
CAP1 3
CAP2 4
LED2 5
RT 6
REF 7
LED3 8
CAP3 9
CAP4 10
LED4 11
VC4 12
TOP VIEW
38 37 36 35 34 33 32
39
GND
31 NC
30 NC
29 SW1
28 SW1
27 SW2
26 SW2
25 SW3
24 SW3
23 SW4
22 SW4
21 NC
20 NC
13 14 15 16 17 18 19
UHF PACKAGE
38-LEAD (5mm × 7mm) PLASTIC QFN
T JMAX = 125°C, θ JA = 34°C/W, θ JC = 2°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3476EUHF#PBF
LT3476IUHF#PBF
LEAD BASED FINISH
LT3476EUHF
LT3476IUHF
TAPE AND REEL
LT3476EUHF#TRPBF
LT3476IUHF#TRPBF
TAPE AND REEL
LT3476EUHF#TR
LT3476IUHF#TR
PART MARKING*
3476
3476
PART MARKING*
3476
3476
PACKAGE DESCRIPTION
38-Lead (5mm × 7mm) Plastic QFN
38-Lead (5mm × 7mm) Plastic QFN
PACKAGE DESCRIPTION
38-Lead (5mm × 7mm) Plastic QFN
38-Lead (5mm × 7mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–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 l denotes the specifications which apply over the full operating
temperature range, (Note 3) otherwise specifications are at T A = 25°C. SW1-4 = 5V, V IN = 3.3V, SHDN = 3.3V, R T = 21k to GND,
PWM1-4 = 3.3V, V ADJ1-4 = REF, CAP1-4 = 5V, unless otherwise noted.
PARAMETER
V IN Operating Range
CONDITIONS
MIN
2.8
TYP
MAX
16
UNITS
V
Full-Scale LED Current Monitor Threshold
One-Tenth Scale LED Current Monitor Threshold
Over CAP1-4/LED1-4 Operating Range
V ADJ1-4 = 100mV
l
102
100
8
105
12
107
108
16
mV
mV
mV
CAP1-4/LED1-4 Operating Range
2.2
33.5
V
REF Output Voltage
10μA ≥ I REF ≥ –200μA
l
1.032
1.050
1.063
V
3476fb
2
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