
LT3799
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V IN , FAULT .................................................................32V
GATE, INTV CC ...........................................................12V
CTRL1, CTRL2, CTRL3, V IN_SENSE , COMP – ................4V
FB, CT, V REF, COMP + ,...................................................3V
SENSE ......................................................................0.4V
DCM .......................................................................±3mA
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2)
LT3799E ............................................ –40°C to 125°C
LT3799I ............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
ORDER INFORMATION
PIN CONFIGURATION
TOP VIEW
CTRL1 1 16 V IN_SENSE
CTRL2 2 15 SENSE
CTRL3 3 14 GATE
V REF 4 17 13 INTV CC
FAULT 5 GND 12 NC
CT 6 11 V IN
COMP + 7 10 DCM
COMP – 8 9 FB
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ JA = 50°C/W, θ JC = 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
LEAD FREE FINISH
LT3799EMSE#PBF
LT3799IMSE#PBF
TAPE AND REEL
LT3799EMSE#TRPBF
LT3799IMSE#TRPBF
PART MARKING*
3799
3799
PACKAGE DESCRIPTION
16-Lead Plastic MSOPE
16-Lead Plastic MSOPE
TEMPERATURE RANGE
–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/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 18V, INTV CC = 11V, unless otherwise noted.
PARAMETER
V IN Turn-On Voltage
V IN Turn-Off Voltage
V IN Hysteresis
V IN Shunt Regulator Voltage
CONDITIONS
V TURNON – V TURNOFF
I = 1mA
MIN
22.2
11.8
TYP
23
12.3
10.7
25.0
MAX
24.2
13.0
UNITS
V
V
V
V
V IN Shunt Regulator Current Limit
15
mA
V IN Quiescent Current
INTV CC Quiescent Current
V IN_SENSE Threshold
V IN_SENSE Linear Range
Before Turn-On
After Turn-On
Before Turn-On
After Turn-On
Turn-Off
55
12
1.5
30
0
65
70
16
1.2
65
75
20.0
2.6
90
1.3
μA
μA
μA
mA
mV
V
V REF Voltage
0μA Load
200μA Load
l
l
1.97
1.95
2
1.98
2.03
2.03
V
V
Error Amplifier Voltage Gain
Error Amplifier Transconductance
?V COMP+ /?V COMP– , CTRL1 = 1V, CTRL2 = 2V, CTRL3 = 2V
?I = 5μA
100
50
V/V
μmhos
3799fa
2