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elecTrical characTerisTics
temperature range, otherwise specifications are at T
SYMBOL
PARAMETER
V
V
Voltage Range
IN
IN
I
V
Quiescent Current
Q
IN
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
EN/UVLO Enable Hysteresis
I
EN/UVLO Hysteresis Current
HYS
V
INTV
Regulation Voltage
INTVCC
CC
I
INTV
Current Limit
INTVCC
CC
INTV
UVLO Threshold
CC
INTV
UVLO Hysteresis
CC
(R
– V
) Voltage
FB
IN
R
Regulation Voltage
REF
R
Regulation Voltage Line Regulation
REF
V
TC Pin Voltage
TC
I
TC Pin Current
TC
f
Minimum Switching Frequency
MIN
t
Minimum Switch-On Time
ON(MIN)
t
Maximum Switch-Off Time
OFF(MAX)
I
Maximum Switch Current Limit
SW(MAX)
I
Minimum Switch Current Limit
SW(MIN)
R
Switch On-Resistance
DS(ON)
I
Switch Leakage Current
LKG
t
Soft-Start Timer
SS
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 65V 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 65V as shown
in Figure 5.
Note 3: The LT8302E is guaranteed to meet performance specifications
from 0°C to 125°C 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
The
denotes the specifications which apply over the full operating
l
= 25°C. V
= 5V, V
A
IN
EN/UVLO
CONDITIONS
V
= 0.3V
EN/UVLO
V
= 1.1V
EN/UVLO
Sleep Mode (Switch Off)
Active Mode (Switch On)
For Lowest Off I
Q
Falling
V
= 0.3V
EN/UVLO
V
= 1.1V
EN/UVLO
V
= 1.3V
EN/UVLO
I
= 0mA to 10mA
INTVCC
V
= 2.8V
INTVCC
Falling
I
= 75µA to 125µA
RFB
2.8V ≤ V
≤ 42V
IN
V
= 1.2V
TC
V
= 0.8V
TC
Backup Timer
I
= 1.5A
SW
V
= 65V
SW
LT8302I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT8302H is guaranteed over the full –40°C to
150°C operating junction temperature range. The LT8302MP is guaranteed
over the full –55°C to 150°C operating junction temperature range. High
junction temperatures degrade operating lifetimes. Operating lifetime is
derated at junction temperature greater than 125°C.
Note 4: The LT8302 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
temperature may impair device reliability.
For more information
www.linear.com/LT8302
= V
, C
= 1µF to GND, unless otherwise noted.
IN
INTVCC
MIN
TYP
2.8
l
0.5
53
106
380
0.3
0.75
l
1.178
1.214
l
14
–0.1
0
2.3
2.5
–0.1
0
2.85
3
10
13
2.39
2.47
105
–50
0.98
1.00
l
–0.01
0
1.00
12
15
–200
11.3
12
160
170
3.6
4.5
0.78
0.87
80
0.1
11
LT8302
MAX
UNIT
42
V
2
µA
µA
µA
µA
V
1.250
V
mV
0.1
µA
2.7
µA
0.1
µA
3.1
V
16
mA
2.55
V
mV
50
mV
1.02
V
0.01
%/V
V
18
µA
µA
12.7
kHz
ns
µs
5.4
A
0.96
A
mΩ
0.5
µA
ms
8302fb
3
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