Datasheet

LT3799
2
3799fa
pin conFiguraTionabsoluTe MaxiMuM raTings
V
IN
, FAU LT ................................................................. 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
(Note 1)
1
2
3
4
5
6
7
8
CTRL1
CTRL2
CTRL3
V
REF
FAULT
CT
COMP
+
COMP
–
16
15
14
13
12
11
10
9
V
IN_SENSE
SENSE
GATE
INTV
CC
NC
V
IN
DCM
FB
TOP VIEW
17
GND
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
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3799EMSE#PBF LT3799EMSE#TRPBF 3799 16-Lead Plastic MSOPE –40°C to 125°C
LT3799IMSE#PBF LT3799IMSE#TRPBF 3799 16-Lead Plastic MSOPE –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
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Turn-On Voltage 22.2 23 24.2 V
V
IN
Turn-Off Voltage 11.8 12.3 13.0 V
V
IN
Hysteresis V
TURNON
– V
TURNOFF
10.7 V
V
IN
Shunt Regulator Voltage I = 1mA 25.0 V
V
IN
Shunt Regulator Current Limit 15 mA
V
IN
Quiescent Current Before Turn-On
After Turn-On
55 65
70
75 µA
µA
INTV
CC
Quiescent Current Before Turn-On
After Turn-On
12
1.5
16
1.2
20.0
2.6
µA
mA
V
IN_SENSE
Threshold Turn-Off 30 65 90 mV
V
IN_SENSE
Linear Range 0 1.3 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 ∆V
COMP
+
/∆V
COMP
–
, CTRL1 = 1V, CTRL2 = 2V, CTRL3 = 2V 100 V/V
Error Amplifier Transconductance ∆I = 5µA 50 µmhos
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.