(Note 2).................................................. –40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
CTRL
ISN
ISP
VC
16 15 14 13
V
REF
1
PWM 2
SYNC OR
OPENLED
3
SS 4
5
RT
6
SHDN/UVLO
7
INTV
CC
8
V
IN
17
12 FB
11 PWMOUT
10 GATE
9 SENSE
PWMOUT
FB
ISN
ISP
VC
CTRL
V
REF
PWM
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
GATE
SENSE
V
IN
INTV
CC
SHDN/UVLO
RT
SS
SYNC OR
OPENLED
17
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 43°C/W,
θ
JC
= 4°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
UD PACKAGE
16-LEAD (3mm 3mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 68°C/W,
θ
JC
= 4.2°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3755EUD#PBF
LT3755IUD#PBF
LT3755EUD-1#PBF
LT3755IUD-1#PBF
LT3755EMSE#PBF
LT3755IMSE#PBF
LT3755EMSE-1#PBF
LT3755IMSE-1#PBF
TAPE AND REEL
LT3755EUD#TRPBF
LT3755IUD#TRPBF
LT3755EUD-1#TRPBF
LT3755IUD-1#TRPBF
LT3755EMSE#TRPBF
LT3755IMSE#TRPBF
LT3755EMSE-1#TRPBF
LT3755IMSE-1#TRPBF
PART MARKING*
3755
3755
37551
37551
3755
3755
37551
37551
PACKAGE DESCRIPTION
16-Lead (3mm
×
3mm) Plastic QFN
16-Lead (3mm
×
3mm) Plastic QFN
16-Lead (3mm
×
3mm) Plastic QFN
16-Lead (3mm
×
3mm) Plastic QFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°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.
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/
37551fa
2
LT3755/LT3755-1
ELECTRICAL CHARACTERISTICS
PARAMETER
V
IN
Minimum Operating Voltage
V
IN
Shutdown I
Q
V
IN
Operating I
Q
(Not Switching)
V
REF
Voltage
V
REF
Line Regulation
SENSE Current Limit Threshold
SENSE Input Bias Current
SS Pull-Up Current
Error Amplifier
LED Current Sense Threshold (V
ISP
– V
ISN
)
CTRL Threshold Linear Programming Range
CTRL Input Bias Current
LED Current Sense Amplifier Input Common Mode
Range (V
ISP
)
ISP/ISN Short-Circuit Threshold (V
ISP
– V
ISN
)
ISP/ISN Short-Circuit Fault Sensing Common Mode
Range (V
ISN
)
ISP/ISN Input Bias Current
LED Current Sense Amplifier g
m
VC Output Impedance
VC Standby Input Bias Current
FB Regulation Voltage (V
FB
)
V
ISP
= V
ISN
FB Amplifier g
m
FB Pin Input Bias Current
FB Open LED Threshold
FB Overvoltage Threshold
VC Current Mode Gain –
ΔV
VC
/ΔV
SENSE
Oscillator
Switching Frequency
Minimum Off-Time
R
T
= 100k
R
T
= 10k
l
The
l
denotes the specifications which apply over the full operating temp-
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