LT8303E, LT8303I ............................. –40°C to 125°C
LT8303H ............................................ –40°C to 150°C
Storage Temperature Range .............. –65°C to 150°C
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
θ
JA
= 215°C/W
orDer inForMaTion
LEAD FREE FINISH
LT8303ES5#PBF
LT8303IS5#PBF
LT8303HS5#PBF
TAPE AND REEL
LT8303ES5#TRPBF
LT8303IS5#TRPBF
LT8303HS5#TRPBF
http://www.linear.com/product/LT8303#orderinfo
PART MARKING*
LTGXH
LTGXH
LTGXH
PACKAGE DESCRIPTION
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
5-Lead Plastic TSOT-23
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
8303fa
2
For more information
www.linear.com/LT8303
LT8303
elecTrical characTerisTics
SYMBOL
V
IN
PARAMETER
Input Voltage Range
V
IN
UVLO Threshold
I
Q
V
IN
Quiescent Current
Rising
Falling
V
EN/UVLO
= 0.3V
V
EN/UVLO
= 1.1V
Sleep Mode (Switch Off)
Active Mode (Switch On)
For Lowest Off I
Q
Falling
Hysteresis
V
EN/UVLO
= 0.3V
V
EN/UVLO
= 1.1V
V
EN/UVLO
= 1.3V
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 24V, V
EN/UVLO
= V
IN
unless otherwise noted.
CONDITIONS
MIN
5.5
5.3
3.2
1.5
200
70
280
0.3
1.186
–0.1
2.1
–0.1
320
5
V
IN
= V
EN/UVLO
= 12V
Backup Timer
450
70
To Initiate Soft-Start
I
SW
= 100mA
V
IN
= 100V, V
SW
= 150V
l
TYP
MAX
100
5.5
2.5
UNIT
V
V
V
µA
µA
µA
µA
V
V
V
µA
µA
µA
kHz
kHz
ns
ns
µs
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
I
HYS
f
MAX
f
MIN
t
ON(MIN)
t
OFF(MIN)
t
OFF(MAX)
I
SW(MAX)
I
SW(MIN)
R
DS(ON)
I
LKG
I
RFB
EN/UVLO Hysteresis Current
0.75
1.223
0.016
0
2.5
0
350
7
160
350
200
535
105
1
3.2
0.1
0.5
102.5
0.01
620
140
1.284
0.1
2.9
0.1
380
9
Maximum Switching Frequency
Minimum Switching Frequency
Minimum Switch-On Time
Minimum Switch-Off Time
Maximum Switch-Off Time
Maximum SW Current Limit
Minimum SW Current Limit
SW Over Current Limit
Switch On-Resistance
Switch Leakage Current
R
FB
Regulation Current
R
FB
Regulation Current Line Regulation
5.5V ≤ V
IN
≤ 100V
mA
mA
A
Ω
µA
µA
%/V
97.5
100
0.001
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 SW pin is rated to 150V for transients. Depending on the
leakage inductance voltage spike, operating waveforms of the SW pin
should be derated to keep the flyback voltage spike below 150V as shown
in Figure 5.
Note 3:
The LT8303E is guaranteed to meet performance specifications
from 0°C to 125°C operating junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT8303I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT8303H is guaranteed over the full –40°C to
150°C operating junction temperature range. High junction temperatures
degrade operating lifetimes. Operating lifetime is derated at junction
temperatures greater than 125°C.
Note 4:
The LT8303 includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 150°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
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