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LT4363CMS の電気的特性と機能

LT4363CMSのメーカーはLinear Technologyです、この部品の機能は「High Voltage Surge Stopper」です。


製品の詳細 ( Datasheet PDF )

部品番号 LT4363CMS
部品説明 High Voltage Surge Stopper
メーカ Linear Technology
ロゴ Linear Technology ロゴ 




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LT4363CMS Datasheet, LT4363CMS PDF,ピン配置, 機能
LT4363
High Voltage Surge
Stopper with Current Limit
FEATURES
n Withstands Surges Over 80V with VCC Clamp
n Wide Operating Voltage Range: 4V to 80V
n Adjustable Output Clamp Voltage
n Fast Overcurrent Limit: Less Than 5µs
n Reverse Input Protection to –60V
n Adjustable UV/OV Comparator Thresholds
n Low 7µA Shutdown Current
n Shutdown Pin Withstands –60V to 100V
n Adjustable Fault Timer
n Controls N-Channel MOSFET
n Less Than 1% Retry Duty Cycle During Faults,
LT4363-2
n Available in 12-Pin (4mm × 3mm) DFN, 12-Pin
MSOP or 16-Pin SO Packages
APPLICATIONS
n Automotive/Avionic Surge Protection
n Hot Swap™/Live Insertion
n High Side Switch for Battery Powered Systems
n Intrinsic Safety Applications
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No RSENSE, ThinSOT and Hot Swap are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
DESCRIPTION
The LT®4363 surge stopper protects loads from high voltage
transients. It regulates the output during an overvoltage
event, such as load dump in vehicles, by controlling the
gate of an external N-channel MOSFET. The output is limited
to a safe value allowing the loads to continue functioning.
The LT4363 also monitors the voltage drop between the
SNS and OUT pins to protect against overcurrent faults.
An internal amplifier limits the voltage across the current
sense resistor to 50mV. In either fault condition, a timer is
started inversely proportional to MOSFET stress. Before the
timer expires, the FLT pin pulls low to warn of an impend-
ing power down. If the condition persists, the MOSFET is
turned off. The LT4363-1 remains off until reset whereas
the LT4363-2 restarts after a cool down period.
Two precision comparators can monitor the input supply
for overvoltage (OV) and undervoltage (UV) conditions.
When the potential is below the UV threshold, the external
MOSFET is kept off. If the input supply voltage is above the
OV threshold, the MOSFET is not allowed to turn back on.
Back-to-back MOSFETs can be used in lieu of a Schottky
diode for reverse input protection, reducing voltage drop
and power loss. A shutdown pin reduces the quiescent
current to less than 7µA during shutdown.
TYPICAL APPLICATION
4A, 12V Overvoltage Output Regulator with 150V Surge Protection
VIN
12V
0.1µF
SMAJ58A
127k
49.9k
FDB33N25 10mΩ
1k
10Ω
VCC GATE SNS
SHDN
UV
LT4363-2
OUT
FB
ENOUT
OV GND TMR FLT
4363 TA01
0.1µF
57.6k
22µF
OUTPUT
CLAMP
AT 16V
4.99k
FAULT
VCC
DC/DC
CONVERTER
SHDN GND
VIN
20V/DIV
Overvoltage Protector Regulates
Output at 27V During Transient
80V INPUT SURGE
CTMR = 6.8µF
ILOAD = 500mA
12V
VOUT
20V/DIV
12V
27V ADJUSTABLE CLAMP
100ms/DIV
4363 TA01b
4363fa
1

1 Page





LT4363CMS pdf, ピン配列
LT4363
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT4363CDE-1#PBF
LT4363CDE-1#TRPBF 43631
12-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LT4363IDE-1#PBF
LT4363IDE-1#TRPBF
43631
12-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
LT4363CDE-2#PBF
LT4363CDE-2#TRPBF 43632
12-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LT4363IDE-2#PBF
LT4363IDE-2#TRPBF
43632
12-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
LT4363CMS-1#PBF
LT4363CMS-1#TRPBF 43631
12-Lead Plastic MSOP
0°C to 70°C
LT4363IMS-1#PBF
LT4363IMS-1#TRPBF 43631
12-Lead Plastic MSOP
–40°C to 85°C
LT4363CMS-2#PBF
LT4363CMS-2#TRPBF 43632
12-Lead Plastic MSOP
0°C to 70°C
LT4363IMS-2#PBF
LT4363IMS-2#TRPBF 43632
12-Lead Plastic MSOP
–40°C to 85°C
LT4363CS-1#PBF
LT4363CS-1#TRPBF
LT4363S-1
16-Lead Plastic SO
0°C to 70°C
LT4363IS-1#PBF
LT4363IS-1#TRPBF
LT4363S-1
16-Lead Plastic SO
–40°C to 85°C
LT4363CS-2#PBF
LT4363CS-2#TRPBF
LT4363S-2
16-Lead Plastic SO
0°C to 70°C
LT4363IS-2#PBF
LT4363IS-2#TRPBF
LT4363S-2
16-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 12V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
VCC Operating Voltage Range
LT4363C
LT4363I
l4
l 4.5
80
80
ICC VCC Supply Current
SHDN Open, OUT = SNS = 12V
SHDN = 0V, OUT = SNS = 0V
l 0.7 1.2
7 20
l 40
IR Reverse Input Current
VCC = –60V, SHDN, UV, OV Open
VCC = SHDN = UV = OV = –60V
l –0.5 –3
l –3 –10
ΔVGATE GATE Drive
IGATE(UP) GATE Pull-Up Current
ΔVGATE = (GATE – SNS);VCC = OUT
VCC = 4V; IGATE = –0.5µA, 0µA
9V ≤ VCC ≤ 80V; IGATE = –1µA, 0µA
VCC = GATE = OUT = 12V
VCC = GATE = OUT = 48V
l 4.5
l 10 13 16
l –10 –20 –35
l –10 –25 –40
IGATE(DN) GATE Pull-Down Current
Overvoltage: FB = 1.5V, GATE = 12V, OUT = 5V
SOhveurtcduorwrenn/Ut:VΔMVSoNdSe:= S1H5D0mN V=, 0VVG,AGTEAT=E1=0V1,0OVUT = 0V
UV = 1V, GATE = 10V
l 75
l 50
l 50
l 200
150
100
1000
1000
VFB FB Servo Voltage
IFB FB Input Current
GATE = 12V; OUT = 8V
VFB = 1.275V
l 1.25 1.275
l ±0.2
1.3
±1
ΔVSNS
Current Limit Sense Voltage
ΔVSNS = (SNS – OUT)
VVCCCC
=
=
12V,
48V,
OUT
OUT
=
=
3V
3V
to
to
12V
48V
l 43 50 58
l 45 52 59
Current Limit Foldback
VCC = 12V, OUT = 0V to 1V
VCC = 48V, OUT = 0V to 1V
l 15 25 35
l 16 27 36
ISNS SNS Input Current
OUT = SNS = 3V to 80V
OUT = SNS = 0V
l 20 30
l –10 –15
UNITS
V
V
mA
µA
µA
mA
mA
V
V
µA
µA
mA
mA
µA
µA
V
µA
mV
mV
mV
mV
µA
µA
4363fa
3


3Pages


LT4363CMS 電子部品, 半導体
LT4363
T YPICAL PERFORMANCE CHARACTERISTICS
otherwise noted.
Specifications are at VCC = 12V, TA = 25°C, unless
Gate Drive at Temperature
(ΔVGATE vs Temperature)
14
IGATE = 0µA
13
IGATE = –1µA
12
11
10 VCC = SNS = OUT
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
4363 G10
Gate Drive vs Supply Voltage
(ΔVGATE vs VCC)
16 VCC = SNS = OUT
14
IGATE = 0µA
12
10
IGATE = 1µA
8
6
4
2
0
0 4 8 12 16 20 60 70 80
VCC (V)
4363 G11
TMR High Threshold vs
Supply Voltage
5
4
3
2
1
0 10 20 30 40 50 60 70 80
VCC (V)
4363 G12
Overvoltage TMR Current vs
(VCC – VOUT)
50 TMR = 1V
40
30
20
10
0
0 10 20 30 40 50 60 70 80
VCC – VOUT (V)
4363 G13
Overcurrent TMR Current vs
(VCC – VOUT)
260 TMR = 1V
220
160
120
80
40
0
0 10 20 30 40 50 60 70 80
VCC – VOUT (V)
4363 G14
Warning Period TMR Current
vs VCC
2.5 ∆VDS = 0.5V
2.0
1.5
1.0
0.5
0
0 10 20 30 40 50 60 70 80
VCC (V)
4363 G15
TMR Pull-Down Current vs
Temperature
2.4 TMR = 1V
2.0
1.6
1.2
0.8
0.4
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4363 G16
TMR Pull-Up Current (Cool Down)
vs Temperature
3.0 TMR = 3V
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4363 G17
Output Low Voltage vs Current
6 OUT = SNS = 3V
5
4
3
2
1
0
0 0.5 1.0 1.5 2.0 2.5 3.0
ISINK (mA)
4363 G18
4363fa
6

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
LT4363CMS

High Voltage Surge Stopper

Linear Technology
Linear Technology


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