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B140HB View Datasheet(PDF) - Linear Technology

Part Name
Description
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B140HB
Linear
Linear Technology Linear
B140HB Datasheet PDF : 20 Pages
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LT3474/LT3474-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN Pin ........................................................(–0.3V), 36V
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
VADJ Pin .....................................................................6V
VC, REF, RT Pins ..........................................................3V
SHDN Pin...................................................................VIN
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
PIN CONFIGURATION
TOP VIEW
DNC* 1
OUT 2
LED 3
VIN 4
SW 5
BOOST 6
BIAS 7
GND 8
16 DNC*
15 GND
14 PWM
17
13 VADJ
12 VC
11 REF
10 SHDN
9 RT
FE PACKAGE
16-LEAD PLASTIC TSSOP
θJC = 8°C/W, θJA = 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS.
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3474EFE#PBF
LT3474EFE#TRPBF
3474EFE
16-Lead TSSOP
LT3474IFE#PBF
LT3474IFE#TRPBF
3474IFE
16-Lead TSSOP
LT3474EFE-1#PBF
LT3474EFE-1#TRPBF 3474EFE-1
16-Lead TSSOP
LT3474IFE-1#PBF
LT3474IFE-1#TRPBF
3474IFE-1
16-Lead TSSOP
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/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
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 MAX UNITS
Minimum Input Voltage
l
3.5
4
V
Input Quiescent Current
Not Switching
2.6
4
mA
Shutdown Current
LED Pin Current
SHDN = 0.3V, VBOOST = 0V, VOUT = 0V
VADJ Tied to VREF
VADJ Tied to VREF/5
0.01
2
μA
0.98
1
1.02
A
l 0.968
1.025
A
0.193
0.2
0.207
A
l 0.186
0.210
A
REF Voltage
l 1.23
1.25 1.265
V
3474fd
2
 

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