(Note 2).................................................. –40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 125°C
MS PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 130°C/W
ORDER INFORMATION
LEAD FREE FINISH
LT3519EMS#PBF
LT3519EMS-1#PBF
LT3519EMS-2#PBF
LT3519IMS#PBF
LT3519IMS-1#PBF
LT3519IMS-2#PBF
TAPE AND REEL
LT3519EMS#TRPBF
LT3519EMS-1#TRPBF
LT3519EMS-2#TRPBF
LT3519IMS#TRPBF
LT3519IMS-1#TRPBF
LT3519IMS-2#TRPBF
PART MARKING*
3519
35191
35192
3519
35191
35192
PACKAGE DESCRIPTION
16-Lead Plastic MSOP
16-Lead Plastic MSOP
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
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/
ELECTRICAL CHARACTERISTICS
PARAMETER
V
IN
Operating Voltage Range
V
IN
Supply Current
CONDITIONS
The
l
denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V,
SHDN/UVLO
= 12V, CTRL = 2V, PWM = 5V,
unless otherwise noted.
MIN
3
0.1
2.0
2.5
l
l
TYP
MAX
30
1
3.0
3.5
260
3
UNITS
V
μA
mA
mA
mV
mV
mV
%/V
Continuous Operation (Note 3)
SHDN/UVLO
= 0V
(Shutdown)
PWM = 0V
(Idle)
PWM > 1.5V, FB = 1.5V (Active, Not Switching)
ISP = 24V
ISP = 0V
ISP = 24V, CTRL = 100mV
2.5V < ISP < 45V
Current Sense Voltage (V
ISP
-V
ISN
)
Zero Current Sense Voltage (V
ISP
-V
ISN
)
Current Sense Voltage Line Regulation
240
–15
250
250
–6
0.02
3519fa
2
LT3519/LT3519-1/LT3519-2
ELECTRICAL CHARACTERISTICS
PARAMETER
Switching Frequency
CONDITIONS
400kHz (LT3519)
1MHz
(LT3519-1)
2.2MHz (LT3519-2)
400kHz (LT3519)
1MHz
(LT3519-1)
2.2MHz (LT3519-2)
I
SW
= 500mA
SW = 45V, PWM = 0V
1.2
Current Out of Pin, CTRL = 0.1V
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V,
SHDN/UVLO
= 12V, CTRL = 2V, PWM = 5V,
unless otherwise noted.
MIN
320
0.80
1.9
94
86
72
750
TYP
400
1
2.2
97
93
83
980
300
2
50
1.5
0.8
70
l
MAX
440
1.10
2.4
UNITS
kHz
MHz
MHz
%
%
%
Maximum Duty Cycle
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
CTRL for Full-Scale LED Current
CTRL Pin Bias Current
PWM Input High Voltage
PWM Input Low Voltage
PWM Pin Resistance to GND
FB Regulation Voltage (V
FB
)
FB Pin Threshold Voltage for
OPENLED
Falling
FB Pin Bias Current
ISP , ISN Idle Input Bias Current
ISP , ISN Active Input Bias Current
Schottky Forward Drop
Schottky Leakage Current
SHDN/UVLO
Threshold Voltage Falling
SHDN/UVLO
Input Low Voltage
SHDN/UVLO
Pin Bias Current Low
SHDN/UVLO
Pin Bias Current High
V
REF
Output Voltage
V
REF
Output Pin Regulation
OPENLED
Output Low (V
OL
)
OPENLED
Leakage Current
I
VIN
Drops Below 1μA
SHDN/UVLO
= 1.15V
SHDN/UVLO
= 1.30V
–100μA ≤ I
VREF
≤ 0μA
3V < V
IN
< 40V
I
OPENLED
= 1mA
FB = 0V,
OPENLED
= 40V
Current Out of Pin, FB = 1V
PWM = 0V, ISP = ISN = 24V
ISP = ISN = 24V, Current per Pin
I
SCHOTTKY
= 500mA
CATHODE = 24V, ANODE = 0V
1150
mA
mV
μA
V
nA
V
V
kΩ
V
V
nA
μA
μA
V
100
1.190
1.220
60
17
0.8
1.250
120
1
V
FB
– 70mV V
FB
– 60mV V
FB
– 50mV
4
l
μA
V
V
μA
nA
V
%/V
mV
μA
1.180
1.8
1.220
2.2
10
2
1.270
0.4
2.6
100
2.04
0.04
240
1
l
1.96
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2.
The LT3519E/LT3519E-1/LT3519E-2 are guaranteed to meet
specified performance from 0°C to 125°C junction temperature range.
Specifications over the –40°C to 125°C operating junction temperature
range are assured by design, characterization and correlation with
statistical process controls. The LT3519I/LT3519I-1/LT3519I-2 are
guaranteed to meet performance specifications over the –40°C to 125°C
operating junction temperature range.
Note 3.
Absolute maximum voltage at V
IN
and
OPENLED
is 40V for
nonrepetitive one second transients and 30V for continuous operation.
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