LT8300
elecTrical characTerisTics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, VEN/UVLO = VIN unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
100
6
UNIT
V
IN
Input Voltage Range
6
V
V
IN
UVLO Threshold
Rising
Falling
5.8
3.2
V
V
I
V
Quiescent Current
V
V
= 0.3V
= 1.1V
1.2
200
70
2
µA
µA
µA
µA
Q
IN
EN/UVLO
EN/UVLO
Sleep Mode (Switch Off)
Active Mode (Switch On)
330
l
l
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
For Lowest Off I
0.3
0.75
V
Q
Falling
Hysteresis
1.199
1.223
0.016
1.270
V
V
I
EN/UVLO Hysteresis Current
V
V
V
= 0.3V
= 1.1V
= 1.3V
–0.1
2.2
–0.1
0
2.5
0
0.1
2.8
0.1
µA
µA
µA
HYS
EN/UVLO
EN/UVLO
EN/UVLO
f
f
t
t
t
I
I
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
720
6
750
7.5
780
9
kHz
kHz
ns
MAX
MIN
160
350
200
260
52
ON(MIN)
OFF(MIN)
OFF(MAX)
SW(MAX)
SW(MIN)
ns
Backup Timer
µs
l
l
228
34
292
70
mA
mA
mA
Ω
To Initiate Soft-Start
I = 100mA
SW
520
10
R
Switch On-Resistance
DS(ON)
I
I
Switch Leakage Current
V
= 100V, V = 150V
0.1
0.5
102
0.01
µA
LKG
IN
SW
l
R
FB
R
FB
Regulation Current
98
100
0.001
2.7
µA
RFB
Regulation Current Line Regulation
6V ≤ V ≤ 100V
%/V
ms
IN
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 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
Linear [ Linear ]
