Datasheet

LT3748
2
3748fa
ABSOLUTE MAXIMUM RATINGS
V
IN
, R
FB
...................................................................100V
V
IN
to R
FB
.................................................................. ±5V
EN/ U VLO ...................................................... –0.3V, 100V
INTV
CC
....................................................V
IN
+ 0.3V, 20V
SS, V
C
, TC, R
REF
..........................................................6V
SENSE ......................................................................0.4V
Operating Junction Temperature Range (Note 2)
LT3748E/LT3748I ............................... –40°C to 125°C
LT3748H ............................................ –40°C to 150°C
Storage Temperature Range ..................–65°C to 150°C
ORDER INFORMATION
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
= 10V, unless otherwise noted.
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3748EMS#PBF LT3748EMS#TRPBF 3748 16-Lead Plastic MSOP –40°C to 125°C
LT3748IMS#PBF LT3748IMS#TRPBF 3748 16-Lead Plastic MSOP –40°C to 125°C
LT3748HMS#PBF LT3748HMS#TRPBF 3748 16-Lead Plastic MSOP –40°C to 150°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/
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range
l
5 100 V
Quiescent Current Not Switching
V
EN/UVLO
= 0.2V
1.3
0
1.75
1
mA
µA
V
IN
Quiescent Current, INTV
CC
Overdriven V
INTVCC
= 10V 300 450 µA
INTV
CC
Voltage Range
l
4.5 20 V
INTV
CC
Pin Regulation Voltage 6.8 7 7.2 V
INTV
CC
Dropout (V
IN
– V
INTVCC
), I
INTVCC
= 10mA, V
IN
= 5V 0.7 V
INTV
CC
Undervoltage Lockout Falling Threshold
l
3.45 3.6 3.75 V
EN/UVLO Pin Threshold EN/UVLO Pin Voltage Rising
l
1.19 1.223 1.25 V
EN/UVLO Pin Hysteresis Current EN/UVLO = 1V 1.9 2.4 2.9 µA
Soft-Start Current V
SS
= 0.4V (Note 3) 5 µA
Soft-Start Threshold 0.65 V
Soft-Start Reset Current 3mA
Maximum SENSE Current Limit Threshold V
C
= 2.2V
l
95
90
100
100
105
110
mV
mV
Minimum SENSE Current Limit Threshold V
C
= 0V 15 mV
(Note 1)
PIN CONFIGURATION
1
3
5
6
7
8
V
IN
EN/UVLO
INTV
CC
GATE
SENSE
GND
16
14
12
11
10
9
R
FB
R
REF
TC
V
C
SS
GND
TOP VIEW
MS PACKAGE
16 (12)-LEAD PLASTIC MSOP
T
JMAX
= 150°C, θ
JA
= 90°C/W