LT3798
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
TOP VIEW
EN/UVLO...................................................................30V
IN
1
2
3
4
5
6
7
8
V
IN_SENSE
CTRL1
CTRL2
CTRL3
16
15
14
13
12
11
10
9
SENSE
GATE
V ............................................................................42V
V
17
GND
INꢀV ......................................................................12V
INTV
CC
EN/UVLO
REF
CC
OVP
CꢀRL1, CꢀRL2, CꢀRL3................................................4V
VC
V
IN
+
–
COMP
COMP
DCM
FB
+
–
FB, V , COMP ........................................................3V
REF
VC, OVP, COMP .........................................................4V
MSE PACKAGE
16-LEAD PLASTIC MSOP
SENSE......................................................................0.4V
θ
JA
= ±0°C/W, θ = 10°C/W
JC
EXPOSED PAD (PIN 17) IS GND, MUSꢀ BE SOLDERED ꢀO PCB
V
.................................................................1mA
IN_SENSE
DCM.......................................................................±3mA
Operating ꢀemperature Range (Note 2)
Lꢀ3798E/Lꢀ3798I................................... –40°C to 12±°C
Storage ꢀemperature Range .................. –6±°C to 1±0°C
ORDER INFORMATION
LEAD FREE FINISH
Lꢀ3798EMSE#PBF
Lꢀ3798IMSE#PBF
TAPE AND REEL
PART MARKING*
3798
PACKAGE DESCRIPTION
TEMPERATURE RANGE
Lꢀ3798EMSE#ꢀRPBF
Lꢀ3798IMSE#ꢀRPBF
16-Lead Plastic MSOP
16-Lead Plastic MSOP
–40°C to 12±°C
–40°C to 12±°C
3798
Consult LꢀC Marketing for parts specified with wider operating temperature ranges. *ꢀhe 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 TA = 25°C. VIN = 18V, INTVCC = 11V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
10
TYP
MAX
38
UNITS
Input Voltage Range
V
V
IN
Quiescent Current
V
V
= 0.2V
= 1.±V, Not Switching
4±
60
70
70
μA
μA
EN/UVLO
EN/UVLO
V
IN
V
IN
V
IN
Quiescent Current, INꢀV Overdriven
V
= 11V
60
40
8
μA
V
CC
INꢀVCC
Shunt Regulator Voltage
I = 1mA
Shunt Regulator Current Limit
mA
INꢀV Quiescent Current
V
V
= 0.2V
= 1.±V, Not Switching
12.±
1.8
1±.±
2.2
17.±
2.7
μA
mA
CC
EN/UVLO
EN/UVLO
l
EN/UVLO Pin ꢀhreshold
EN/UVLO Pin Voltage Rising
EN/UVLO=1V
1.21
8
1.2±
10
1.29
12
V
μA
μA
EN/UVLO Pin Hysteresis Current
V
V
ꢀhreshold
ꢀurn Off
27
IN_SENSE
l
l
Voltage
0 μA Load
200μA Load
1.97
1.9±
2.0
1.98
2.03
2.03
V
V
REF
CꢀRL1/CꢀRL2/CꢀRL3 Pin Bias Current
CꢀLR1/CꢀRL2/CꢀRL3 = 1V
±30
nA
3798f
2
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