CAP OUT Voltages (OUT ≤ CAP) ...............................30V
,
V
FB
Voltage .................................................................4V
R
T
Voltage ...................................................................6V
SHDN
Voltage ............................................................V
IN
DA Pin Current (Average)..................... –1.2A (sourcing)
Operating Temperature Range (Notes 2, 3)
LT3592E ............................................. –40°C to 125°C
LT3592I .............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
R
T
BRIGHT
SHDN
V
IN
DA
1
2
3
4
5
11
10 V
FB
9 OUT
8 CAP
7 BOOST
6 SW
TOP VIEW
R
T
BRIGHT
SHDN
V
IN
DA
1
2
3
4
5
10
9
8
7
6
V
FB
OUT
CAP
BOOST
SW
11
DDB PACKAGE
10-LEAD (3mm 2mm) PLASTIC DFN
θ
JA
= 76°C/W,
θ
JC
= 13.5°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 38°C/W,
θ
JC
= 8°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3592EDDB#PBF
LT3592IDDB#PBF
LT3592EMSE#PBF
LT3592IMSE#PBF
LEAD BASED FINISH
LT3592EDDB
LT3592IDDB
LT3592EMSE
LT3592IMSE
TAPE AND REEL
LT3592EDDB#TRPBF
LT3592IDDB#TRPBF
LT3592EMSE#TRPBF
LT3592IMSE#TRPBF
TAPE AND REEL
LT3592EDDB#TR
LT3592IDDB#TR
LT3592EMSE#TR
LT3592IMSE#TR
PART MARKING*
LDCQ
LDCQ
LTDCR
LTDCR
PART MARKING
LDCQ
LDCQ
LTDCR
LTDCR
PACKAGE DESCRIPTION
10-Lead (3mm
×
2mm) Plastic DFN
10-Lead (3mm
×
2mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead Plastic MSOP
PACKAGE DESCRIPTION
10-Lead (3mm
×
2mm) Plastic DFN
10-Lead (3mm
×
2mm) Plastic DFN
10-Lead Plastic MSOP
10-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
TEMPERATURE RANGE
–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.
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/
3592fc
2
LT3592
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Input Quiescent Current in Shutdown
CAP to OUT Voltage
Not Switching
V
SHDN
= 0.3V
0.4Ω CAP to OUT
BRIGHT = 1.4V
BRIGHT = 0.3V
R
T
= 357k
R
T
= 140k
R
T
= 48.7k
R
T
= 140k
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, V
BOOST
= 16V, V
OUT
= 4V unless otherwise noted. (Note 2)
CONDITIONS
l
MIN
TYP
3.25
2
0.1
MAX
3.6
3
2
210
22
–1.2
450
1000
2.5
UNITS
V
mA
μA
mV
mV
A
kHz
kHz
MHz
%
V
190
18
–0.8
350
800
1.9
90
2.3
200
20
–1
400
900
2.2
94
DA Pin Current to Stop OSC
Switching Frequency
Maximum Duty Cycle
SHDN
Input High Voltage
SHDN
Input Low Voltage
BRIGHT Input High Voltage
BRIGHT Input Low Voltage
Switch Current Limit (Note 4)
Switch V
CESAT
Boost Pin Current
Switch Leakage Current
Minimum Boost Voltage (V
BOOST
– V
IN
)
Boost Diode Forward Voltage
V
FB
Voltage
V
FB
Input Leakage Current
0.3
1.4
0.3
l
V
V
V
A
mV
mA
μA
V
mV
V
nA
0.85
1.25
300
20
1
1.8
800
1.5
30
10
2.5
1.235
250
I
SW
= 500mA
I
SW
= 500mA
V
OUT
= 4V
I
DIO
= 50mA
OUT = CAP = 4V, Bright = 12V
V
FB
= 1.21V
l
l
1.185
–250
1.21
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 LT3592E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3592I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The operating lifetime is derated at junction
temperatures greater than 125°C.
Note 3:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specified maximum operating junction temperature may result in
device degradation or failure.
Note 4:
Switch Current Measurements are performed when the outputs
are not switching. Slope compensation reduces current limit at higher duty
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