Electrical Characteristics - Linear Technology Analog Devices LT8301 Datasheet

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T
SYMBOL PARAMETER
V Input Voltage Range
IN
V UVLO Threshold
IN
I V Quiescent Current
Q IN
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
I EN/UVLO Hysteresis Current
HYS
f Minimum Switching Frequency
MIN
t Minimum Switch-On Time
ON(MIN)
t Maximum Switch-Off Time
OFF(MAX)
I Maximum SW Current Limit
SW(MAX)
I Minimum SW Current Limit
SW(MIN)
R Switch On-Resistance
DS(ON)
I Switch Leakage Current
LKG
I R Regulation Current
RFB FB
R Regulation Current Line Regulation
FB
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 LT8301E 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 denotes the specifications which apply over the full operating
l
= 25°C. V = 5V, V
A IN EN/UVLO
CONDITIONS
Rising
Falling
V = 0.2V
EN/UVLO
V = 1.1V
EN/UVLO
Sleep Mode (Switch Off)
Active Mode (Switch On)
For Lowest Off I
Q
Falling
Hysteresis
V = 0.2V
EN/UVLO
V = 1.1V
EN/UVLO
V = 1.3V
EN/UVLO
Backup Timer
I = 500mA
SW
V = 42V, V = 65V
IN SW
2.7V ≤ V ≤ 42V
IN
The LT8301I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT8301H is guaranteed over the full –40°C to
150°C operating junction temperature range. The LT8301MP 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 LT8301 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.analog.com
= V unless otherwise noted.
IN
MIN TYP
2.7
l
215
100
350
0.2 0.55
l
1.204 1.228
0.014
–0.1
2.2
–0.1
9.4
170
190
1.200 1.375
l
0.22 0.29
l
97.5 100
l
0.02
LT8301
MAX UNIT
42 V
2.5 2.65 V
2.3 V
0.8 2 µA
µA
µA
µA
V
1.248 V
V
0 0.1 µA
2.5 2.8 µA
0 0.1 µA
10 10.6 kHz
ns
µs
1.550 A
0.36 A
0.4 Ω
0.1 0.5 µA
102.5 µA
0.1 %/V
Rev. A
3