LT3474/LT3474-1
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
V Pin ........................................................(–0.3V), 36V
IN
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
TOP VIEW
DNC*
OUT
LED
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DNC*
GND
PWM
V
17
V
ADJ
IN
SW
BOOST
BIAS
V
C
V
Pin .....................................................................6V
ADJ
REF
V , REF, R Pins ..........................................................3V
SHDN
C
T
SHDN Pin...................................................................V
GND
R
T
IN
BIAS Pin Current.........................................................1A
Maximum Junction Temperature (Note 2)............. 125°C
Operating Temperature Range (Note 3)
FE PACKAGE
16-LEAD PLASTIC TSSOP
θ
= 8°C/W, θ = 40°C/W
JA
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
JC
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
*DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS.
ORDER INFORMATION
LEAD FREE FINISH
LT3474EFE#PBF
LT3474IFE#PBF
TAPE AND REEL
PART MARKING
3474EFE
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3474EFE#TRPBF
LT3474IFE#TRPBF
LT3474EFE-1#TRPBF
LT3474IFE-1#TRPBF
16-Lead TSSOP
16-Lead TSSOP
16-Lead TSSOP
16-Lead TSSOP
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
3474IFE
LT3474EFE-1#PBF
LT3474IFE-1#PBF
3474EFE-1
3474IFE-1
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard 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, VBOOST = 16V, VOUT = 4V unless otherwise noted (Note 3).
PARAMETER
CONDITIONS
MIN
TYP
3.5
2.6
0.01
1
MAX
UNITS
V
l
Minimum Input Voltage
Input Quiescent Current
Shutdown Current
LED Pin Current
4
4
2
Not Switching
mA
μA
SHDN = 0.3V, V
= 0V, V
= 0V
OUT
BOOST
V
ADJ
Tied to V
0.98
0.968
0.193
0.186
1.02
1.025
0.207
0.210
A
A
A
A
REF
l
V
ADJ
Tied to V /5
0.2
REF
l
l
REF Voltage
1.23
1.25
1.265
V
3474fd
2
Linear [ Linear ]
