LT8304E/LT8304E-1 .......................... –40°C to 125°C
LT8304I/LT8304I-1 ............................ –40°C to 125°C
LT8304H/LT8304H-1 ......................... –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
S8E PACKAGE
8-LEAD PLASTIC SO
θ
JA
= 33°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8304ES8E#PBF
LT8304IS8E#PBF
LT8304HS8E#PBF
LT8304ES8E-1#PBF
LT8304IS8E-1#PBF
LT8304HS8E-1#PBF
TAPE AND REEL
LT8304ES8E#TRPBF
LT8304IS8E#TRPBF
LT8304HS8E#TRPBF
LT8304ES8E-1#TRPBF
LT8304IS8I-1#TRPBF
LT8304HS8E-1#TRPBF
http://www.linear.com/product/LT8304#orderinfo
PART MARKING*
8304
8304
8304
83041
83041
83041
PACKAGE DESCRIPTION
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2
8304fa
For more information
www.linear.com/LT8304
LT8304/LT8304-1
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
, C
INTVCC
= 1µF to GND, unless otherwise
noted.
SYMBOL
V
IN
I
Q
PARAMETER
V
IN
Voltage Range
V
IN
Quiescent Current
V
EN/UVLO
= 0.2V
V
EN/UVLO
= 1.1V
Sleep Mode (Switch Off)
Active Mode (Switch On)
For Lowest Off I
Q
Falling
V
EN/UVLO
= 0.2V
V
EN/UVLO
= 1.1V
V
EN/UVLO
= 1.3V
I
INTVCC
= 0mA to 10mA
V
INTVCC
= 2.8V
Falling
I
RFB
= 75µA to 125µA
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
l
MIN
3
TYP
1.8
63
116
390
MAX
100
3
UNIT
V
µA
µA
µA
µA
V
V
mV
µA
µA
µA
V
mA
V
mV
mV
V
%
V
µA
µA
µA
kHz
kHz
ns
ns
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
EN/UVLO Enable Hysteresis
I
HYS
V
INTVCC
I
INTVCC
EN/UVLO Hysteresis Current
0.2
1.178
–0.1
2.3
–0.1
2.8
2.38
–60
0.98
0.5
1.214
14
0
2.5
0
3
16
2.47
105
60
1.00
0.02
1.00
1.02
0.1
18
13
385
14
2.56
0.1
2.7
0.1
3.1
1.250
INTV
CC
Regulation Voltage
INTV
CC
Current Limit
INTV
CC
UVLO Threshold
INTV
CC
UVLO Hysteresis
(R
FB
– V
IN
) Voltage
R
REF
Regulation Voltage
R
REF
Regulation Voltage Line Regulation
3V ≤ V
IN
≤ 100V
V
TC
= 1.2V (LT8304)
V
TC
= 1.2V (LT8304-1)
V
TC
= 0.8V
l
V
TC
I
TC
f
MAX
f
MIN
t
ON(MIN)
I
SW(MAX)
I
SW(MIN)
R
DS(ON)
I
LKG
t
SS
TC Pin Voltage
TC Pin Current
12
7
315
8
(LT8304)
(LT8304-1)
2.0
0.43
I
SW
= 0.8A
V
SW
= 150V
15
10
–200
350
11
160
950
2.4
0.48
0.5
0.1
11
Maximum Switching Frequency
Minimum Switching Frequency
Minimum Switch-On Time
Maximum Switch Current Limit
Minimum Switch Current Limit
Switch On-Resistance
Switch Leakage Current
Soft-Start Timer
2.8
0.53
0.5
A
A
Ω
µA
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 LT8304E/LT8304E-1 are 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 LT8304I/LT8304I-1 are guaranteed over the full –40°C to 125°C
operating junction temperature range. LT8304H/LT304H-1 are guaranteed
over the full –40°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 LT8304/LT8304-1 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.
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