LT3476IUHF 查看數據表（PDF） - Linear Technology
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LT3476IUHF Datasheet PDF : 14 Pages
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LT3476
Absolute Maximum Ratings
(Note 1)
VIN............................................................................. 16V
PWM1-4, SHDN.........................................................16V
SW1-4, LED1-4, CAP1-4............................................36V
REF, RT, VADJ1-4, 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
Pin Configuration
TOP VIEW
VC1 1
LED1 2
CAP1 3
CAP2 4
LED2 5
RT 6
REF 7
LED3 8
CAP3 9
CAP4 10
LED4 11
VC4 12
38 37 36 35 34 33 32
39
GND
13 14 15 16 17 18 19
31 NC
30 NC
29 SW1
28 SW1
27 SW2
26 SW2
25 SW3
24 SW3
23 SW4
22 SW4
21 NC
20 NC
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 l 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
Full-Scale LED Current Monitor Threshold
Over CAP1-4/LED1-4 Operating Range
2.8
16
V
102
105
107
mV
l 100
108
mV
One-Tenth Scale LED Current Monitor Threshold
CAP1-4/LED1-4 Operating Range
VADJ1-4 = 100mV
8
12
16
mV
2.2
33.5
V
REF Output Voltage
10µA ≥ IREF ≥ –200µA
l 1.032 1.050 1.063
V
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