LT8302MPS8E 查看數據表（PDF） - Linear Technology
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LT8302MPS8E
Linear Technology
LT8302MPS8E Datasheet PDF : 26 Pages
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LT8302
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VEN/UVLO = VIN, CINTVCC = 1µF to GND, unless otherwise noted.
SYMBOL
VIN
IQ
IHYS
VINTVCC
IINTVCC
VTC
ITC
fMIN
tON(MIN)
tOFF(MAX)
ISW(MAX)
ISW(MIN)
RDS(ON)
ILKG
tSS
PARAMETER
VIN Voltage Range
VIN Quiescent Current
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
EN/UVLO Enable Hysteresis
EN/UVLO Hysteresis Current
INTVCC Regulation Voltage
INTVCC Current Limit
INTVCC UVLO Threshold
INTVCC UVLO Hysteresis
(RFB – VIN) Voltage
RREF Regulation Voltage
RREF Regulation Voltage Line Regulation
TC Pin Voltage
TC Pin Current
Minimum Switching Frequency
Minimum Switch-On Time
Maximum Switch-Off Time
Maximum Switch Current Limit
Minimum Switch Current Limit
Switch On-Resistance
Switch Leakage Current
Soft-Start Timer
CONDITIONS
VEN/UVLO = 0.3V
VEN/UVLO = 1.1V
Sleep Mode (Switch Off)
Active Mode (Switch On)
For Lowest Off IQ
Falling
VEN/UVLO = 0.3V
VEN/UVLO = 1.1V
VEN/UVLO = 1.3V
IINTVCC = 0mA to 10mA
VINTVCC = 2.8V
Falling
IRFB = 75µA to 125µA
2.8V ≤ VIN ≤ 42V
VTC = 1.2V
VTC = 0.8V
Backup Timer
ISW = 1.5A
VSW = 65V
MIN
TYP
MAX
UNIT
l 2.8
42
V
0.5
2
µA
53
µA
106
µA
380
µA
l 0.3
0.75
V
l 1.178
1.214
1.250
V
14
mV
–0.1
0
0.1
µA
2.3
2.5
2.7
µA
–0.1
0
0.1
µA
2.85
3
3.1
V
10
13
16
mA
2.39
2.47
2.55
V
105
mV
–50
50
mV
l 0.98
1.00
1.02
V
–0.01
0
0.01
%/V
1.00
V
12
15
18
µA
–200
µA
11.3
12
12.7
kHz
160
ns
170
µs
3.6
4.5
5.4
A
0.78
0.87
0.96
A
80
mΩ
0.1
0.5
µA
11
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 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
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
8302fa
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