LT8300
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
6
5.8
3.2
1.2
200
70
330
0.3
1.199
–0.1
2.2
–0.1
720
6
0.75
1.223
0.016
0
2.5
0
750
7.5
160
350
Backup Timer
l
l
TYP
MAX
100
6
2
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
t
SS
EN/UVLO Hysteresis Current
1.270
0.1
2.8
0.1
780
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
Soft-Start Timer
6V ≤ V
IN
≤ 100V
To Initiate Soft-Start
I
SW
= 100mA
V
IN
= 100V, V
SW
= 150V
l
200
228
34
260
52
520
10
0.1
98
100
0.001
2.7
0.5
102
0.01
292
70
mA
mA
mA
Ω
µA
µA
%/V
ms
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 LT8300E 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 LT8300I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT8300H is guaranteed over the full –40°C to
150°C operating junction temperature range. The LT8300MP 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 LT8300 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.
8300f
3
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