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
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
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
PARAMETER
V
IN
Turn-On Voltage
V
IN
Turn-Off Voltage
V
IN
Hysteresis
V
IN
Shunt Regulator Voltage
V
IN
Shunt Regulator Current Limit
V
IN
Quiescent Current
INTV
CC
Quiescent Current
V
IN_SENSE
Threshold
V
IN_SENSE
Linear Range
V
REF
Voltage
Error Amplifier Voltage Gain
Error Amplifier Transconductance
0µA Load
200µA Load
Before Turn-On
After Turn-On
Before Turn-On
After Turn-On
Turn-Off
CONDITIONS
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.
MIN
22.2
11.8
V
TURNON
– V
TURNOFF
I = 1mA
15
55
12
1.5
30
0
l
l
TYP
23
12.3
10.7
25.0
65
70
16
1.2
65
2
1.98
100
50
MAX
24.2
13.0
UNITS
V
V
V
V
mA
75
20.0
2.6
90
1.3
2.02
2.02
µA
µA
µA
mA
mV
V
V
V
V/V
µmhos
1.975
1.9555
∆V
COMP+
/∆V
COMP–
, CTRL1 = 1V, CTRL2 = 2V, CTRL3 = 2V
∆I = 5µA
3799p
2
LT3799
ELECTRICAL CHARACTERISTICS
PARAMETER
FB Pin Bias Current
CTRL1/CTRL2/CTRL3 Pin Bias Current
SENSE Current Limit Threshold
SENSE Input Bias Current
Current Loop Voltage Gain
CT Pin Charge Current
CT Pin Discharge Current
CT Pin Low Threshold
CT Pin High Threshold
CT Pin Low Hysteresis
FB Pin High Threshold
DCM Current Turn-On Threshold
Maximum Oscillator Frequency
Minimum Oscillator Frequency
Back-Up Oscillator Frequency
Linear Regulator
INTV
CC
Regulation Voltage
Dropout (V
IN
– INTV
CC
)
Current Limit
Current Limit
Gate Driver
t
r
GATE Driver Output Rise Time
t
f
GATE Driver Output Fall Time
GATE Output Low (V
OL
)
GATE Output High (V
OH
)
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 LT3799E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
INTV
CC
– 0.05
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3799I is guaranteed to meet performance specifications from –40°C to
125°C operating junction temperature.
Note 3:
Current flows out of the FB pin.
C
L
= 3300pF 10% to 90%
,
C
L
= 3300pF 90% to 10%
,
20
20
0.05
ns
ns
V
V
INTV
CC
= –10mA
Below Undervoltage Threshold
Above Undervoltage Threshold
17
80
9.8
10
500
25
120
10.4
900
V
mV
mA
mA
Current Out of Pin
COMP
+
= 1.2V, V
IN_SENSE
= 1V
COMP
+
= 0V, V
IN_SENSE
1.22
Falling Threshold
Rising Threshold
Current Out of Pin, SENSE = 0V
∆V
CTRL
/∆V
SENSE
, 1000pF Cap from COMP
+
to COMP
–
CONDITIONS
(Note 3), FB = 1V
CTRL/CTRL2/CTRL3 = 1V
96
100
15
21
10
200
240
1.25
100
1.25
45
300
25
20
1.29
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
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