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LT3474/LT3474-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V IN Pin ........................................................(–0.3V), 36V
PIN CONFIGURATION
BIAS Pin....................................................................25V
BOOST Pin Voltage ...................................................51V
BOOST above SW Pin ...............................................25V
OUT, LED Pins (LT3474) ............................................15V
OUT, LED Pins (LT3474-1).........................................26V
PWM Pin ...................................................................10V
V ADJ Pin .....................................................................6V
V C , REF, R T Pins ..........................................................3V
DNC*
OUT
LED
V IN
SW
BOOST
BIAS
1
2
3
4
5
6
7
TOP VIEW
17
16 DNC*
15 GND
14 PWM
13 V ADJ
12 V C
11 REF
10 SHDN
SHDN Pin ...................................................................V IN
GND
8
9
R T
BIAS Pin Current .........................................................1A
Maximum Junction Temperature (Note 2)............. 125°C
Operating Temperature Range (Note 3)
LT3474E, LT3474E-1 ............................ –40°C to 85°C
LT3474I, LT3474I-1 ............................ –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
ORDER INFORMATION
FE PACKAGE
16-LEAD PLASTIC TSSOP
θ JC = 8°C/W, θ JA = 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS.
LEAD FREE FINISH
LT3474EFE#PBF
LT3474IFE#PBF
LT3474EFE-1#PBF
LT3474IFE-1#PBF
TAPE AND REEL
LT3474EFE#TRPBF
LT3474IFE#TRPBF
LT3474EFE-1#TRPBF
LT3474IFE-1#TRPBF
PART MARKING
3474EFE
3474IFE
3474EFE-1
3474IFE-1
PACKAGE DESCRIPTION
16-Lead TSSOP
16-Lead TSSOP
16-Lead TSSOP
16-Lead TSSOP
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based ?nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speci?cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 12V, V BOOST = 16V, V OUT = 4V unless otherwise noted (Note 3).
PARAMETER
Minimum Input Voltage
Input Quiescent Current
Shutdown Current
CONDITIONS
Not Switching
SHDN = 0.3V, V BOOST = 0V, V OUT = 0V
l
MIN
TYP
3.5
2.6
0.01
MAX
4
4
2
UNITS
V
mA
μA
LED Pin Current
V ADJ Tied to V REF
l
0.98
0.968
1
1.02
1.025
A
A
REF Voltage
V ADJ Tied to V REF /5
l
l
0.193
0.186
1.23
0.2
1.25
0.207
0.210
1.265
A
A
V
3474fd
2
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