Datasheet LT4363 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | High Voltage Surge Stopper with Current Limit |
| Pages / Page | 24 / 1 — FeaTures. DescripTion. Withstands Surges Over 100V with VCC Clamp. Wide … |
| File Format / Size | PDF / 255 Kb |
| Document Language | English |
FeaTures. DescripTion. Withstands Surges Over 100V with VCC Clamp. Wide Operating Voltage Range: 4V to 80V
Model Line for this Datasheet
- LT4363CDE-1#PBF LT4363CDE-1#TRPBF LT4363CDE-2#PBF LT4363CDE-2#TRPBF LT4363CMS-1#PBF LT4363CMS-1#TRPBF LT4363CMS-2#PBF LT4363CMS-2#TRPBF LT4363CS-1#PBF LT4363CS-1#TRPBF LT4363CS-2#PBF LT4363CS-2#TRPBF LT4363HDE-1#PBF LT4363HDE-1#TRPBF LT4363HDE-2#PBF LT4363HDE-2#TRPBF LT4363HMS-1#PBF LT4363HMS-1#TRPBF LT4363HMS-2#PBF LT4363HMS-2#TRPBF LT4363HS-1#PBF LT4363HS-1#TRPBF LT4363HS-2#PBF LT4363HS-2#TRPBF LT4363IDE-1#PBF LT4363IDE-1#TRPBF LT4363IDE-2#PBF LT4363IDE-2#TRPBF LT4363IMS-1#PBF LT4363IMS-1#TRPBF LT4363IMS-2#PBF LT4363IMS-2#TRPBF LT4363IS-1#PBF LT4363IS-1#TRPBF LT4363IS-2#PBF LT4363IS-2#TRPBF LT4363MPMS-1#PBF LT4363MPMS-1#TRPBF LT4363MPMS-2#PBF LT4363MPMS-2#TRPBF LT4363MPS-1#PBF LT4363MPS-1#TRPBF LT4363MPS-2#PBF LT4363MPS-2#TRPBF
Text Version of Document
LT4363 High Voltage Surge Stopper with Current Limit
FeaTures DescripTion
n
Withstands Surges Over 100V with VCC Clamp
The LT®4363 surge stopper protects loads from high voltage n
Wide Operating Voltage Range: 4V to 80V
transients. It regulates the output during an overvoltage n
Adjustable Output Clamp Voltage
event, such as load dump in vehicles, by controlling the n
Fast Overcurrent Limit: Less Than 5µs
gate of an external N-channel MOSFET. The output is limited n
Reverse Input Protection to –60V
to a safe value allowing the loads to continue functioning. n Adjustable UV/OV Comparator Thresholds The LT4363 also monitors the voltage drop between the n Low 7µA Shutdown Current SNS and OUT pins to protect against overcurrent faults. n Shutdown Pin Withstands –60V to 100V An internal amplifier limits the voltage across the current n Adjustable Fault Timer sense resistor to 50mV. In either fault condition, a timer is n Controls N-Channel MOSFET started inversely proportional to MOSFET stress. Before the n Less Than 1% Retry Duty Cycle During Faults, timer expires, the FLT pin pulls low to warn of an impend- LT4363-2 ing power down. If the condition persists, the MOSFET is n Available in 12-Pin (4mm × 3mm) DFN, 12-Pin turned off. The LT4363-1 remains off until reset whereas MSOP and 16-Pin SO Packages the LT4363-2 restarts after a cool down period. Two precision comparators can monitor the input supply
applicaTions
for overvoltage (OV) and undervoltage (UV) conditions. n When the potential is below the UV threshold, the external Automotive/Avionic/Industrial Surge Protection n MOSFET is kept off. If the input supply voltage is above the Hot Swap™/Live Insertion n OV threshold, the MOSFET is not allowed to turn back on. High Side Switch for Battery Powered Systems n Back-to-back MOSFETs can be used in lieu of a Schottky Intrinsic Safety Applications diode for reverse input protection, reducing voltage drop 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 and power loss. A shutdown pin reduces the quiescent trademarks are the property of their respective owners. current to less than 7µA during shutdown.
Typical applicaTion 4A, 12V Overvoltage Output Regulator with 150V Surge Protection Overvoltage Protector Regulates Output at 27V During Transient
FDB33N25 10mΩ VIN OUTPUT 12V CLAMP 80V INPUT SURGE CTMR = 6.8µF 1k 22µF AT 16V ILOAD = 500mA 10Ω 57.6k VIN 0.1µF VCC GATE SNS OUT 20V/DIV 127k FB SMAJ58A SHDN VCC 4.99k 12V 27V ADJUSTABLE CLAMP UV LT4363-2 DC/DC V CONVERTER OUT 20V/DIV 49.9k 12V ENOUT SHDN GND OV GND TMR FLT FAULT 100ms/DIV 4363 TA01b 4363 TA01 0.1µF 4363fb For more information www.linear.com/LT4363 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
FeaTures DescripTion
n
Withstands Surges Over 100V with VCC Clamp
The LT®4363 surge stopper protects loads from high voltage n
Wide Operating Voltage Range: 4V to 80V
transients. It regulates the output during an overvoltage n
Adjustable Output Clamp Voltage
event, such as load dump in vehicles, by controlling the n
Fast Overcurrent Limit: Less Than 5µs
gate of an external N-channel MOSFET. The output is limited n
Reverse Input Protection to –60V
to a safe value allowing the loads to continue functioning. n Adjustable UV/OV Comparator Thresholds The LT4363 also monitors the voltage drop between the n Low 7µA Shutdown Current SNS and OUT pins to protect against overcurrent faults. n Shutdown Pin Withstands –60V to 100V An internal amplifier limits the voltage across the current n Adjustable Fault Timer sense resistor to 50mV. In either fault condition, a timer is n Controls N-Channel MOSFET started inversely proportional to MOSFET stress. Before the n Less Than 1% Retry Duty Cycle During Faults, timer expires, the FLT pin pulls low to warn of an impend- LT4363-2 ing power down. If the condition persists, the MOSFET is n Available in 12-Pin (4mm × 3mm) DFN, 12-Pin turned off. The LT4363-1 remains off until reset whereas MSOP and 16-Pin SO Packages the LT4363-2 restarts after a cool down period. Two precision comparators can monitor the input supply
applicaTions
for overvoltage (OV) and undervoltage (UV) conditions. n When the potential is below the UV threshold, the external Automotive/Avionic/Industrial Surge Protection n MOSFET is kept off. If the input supply voltage is above the Hot Swap™/Live Insertion n OV threshold, the MOSFET is not allowed to turn back on. High Side Switch for Battery Powered Systems n Back-to-back MOSFETs can be used in lieu of a Schottky Intrinsic Safety Applications diode for reverse input protection, reducing voltage drop 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 and power loss. A shutdown pin reduces the quiescent trademarks are the property of their respective owners. current to less than 7µA during shutdown.
Typical applicaTion 4A, 12V Overvoltage Output Regulator with 150V Surge Protection Overvoltage Protector Regulates Output at 27V During Transient
FDB33N25 10mΩ VIN OUTPUT 12V CLAMP 80V INPUT SURGE CTMR = 6.8µF 1k 22µF AT 16V ILOAD = 500mA 10Ω 57.6k VIN 0.1µF VCC GATE SNS OUT 20V/DIV 127k FB SMAJ58A SHDN VCC 4.99k 12V 27V ADJUSTABLE CLAMP UV LT4363-2 DC/DC V CONVERTER OUT 20V/DIV 49.9k 12V ENOUT SHDN GND OV GND TMR FLT FAULT 100ms/DIV 4363 TA01b 4363 TA01 0.1µF 4363fb For more information www.linear.com/LT4363 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
