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LT4356MP-1/LT4356MP-2: Surge Stopper Data Sheet1/11/2012PDF499K
Alternative Parts
Overview
Features and Benefits
- Stops High Voltage Surges
- Adjustable Output Clamp Voltage
- Overcurrent Protection
- Wide Operation Range: 4V to 80V
- Reverse Input Protection to –60V
- Low 7μA Shutdown Current, LT4356-1
- Adjustable Fault Timer
- Controls N-channel MOSFET
- Shutdown Pin Withstands –60V to 100V
- Fault Output Indication
- Guaranteed Operation –55°C to 125°C
- Auxiliary Amplifier for Level Detection Comparator or Linear Regulator Controller
- Available in 10-Pin MSOP or 16-Pin SO Packages
Product Details
The LT4356 surge stopper protects loads from high voltage transients. It regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the gate of an external N-channel MOSFET. The output is limited to a safe value thereby allowing the loads to continue functioning. The LT4356MP also monitors the voltage drop between the VCC and SNS pins to protect against overcurrent faults. An internal amplifier limits the current sense voltage to 50mV. In either fault condition, a timer is started inversely proportional to MOSFET stress. If the timer expires, the FLT pin pulls low to warn of an impending power-down. If the condition persists, the MOSFET is turned off. After a cooldown period, the GATE pin pulls up turning on the MOSFET again.
The auxiliary amplifier may be used as a voltage detection comparator or as a linear regulator controller driving an external PNP pass transistor.
Back-to-back FETs 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 for the LT4356-1 during shutdown. The LT4356-2 differs from the LT4356-1 during shutdown by reducing the quiescent current to 60μA and keeping alive the auxiliary amplifier for uses such as an undervoltage lockout or always-on regulator.
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LT4356MP-1 |
LT4356MP-2 |
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| Low Current Shutdown | 7uA | 60uA | 7uA |
| Aux Amp In Shutdown | OFF | Always Alive | OFF |
| Fault Retry | Retry | Retry | Latch Off |
| Packages | DFN-12, MS-10, SO-16 | DFN-12, SO-16 | DFN-12, MS-10, SO-16 |
| Temp Grades | C, I, H, MP | C, I, H, MP | C, I, H, MP |
Applications
- Automotive/Avionic Surge Protection
- Hot Swap/Live Insertion
- High Side Switch for Battery Powered Systems
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Documentation & Resources
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R568 Reliability Data3/23/2018PDF179 K
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Hot Swap Controllers7/13/2017PDF778 K
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Surge Stoppers6/22/2017PDF1M
Tools & Simulations
LTspice
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LTspice Simulations
Models for the following parts are available in LTspice:
LT4356-1
LT4356-2
LT4356-3
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LT4356MPMS-1#PBF | Material Declaration | Reliability Data | 10-Lead MSOP | |
| LT4356MPMS-1#TRPBF | Material Declaration | Reliability Data | 10-Lead MSOP | |
| LT4356MPS-1#PBF | Material Declaration | Reliability Data | 16-Lead SOIC (Narrow 0.15 Inch) | |
| LT4356MPS-1#TRPBF | Material Declaration | Reliability Data | 16-Lead SOIC (Narrow 0.15 Inch) | |
| LT4356MPS-2#PBF | Material Declaration | Reliability Data | 16-Lead SOIC (Narrow 0.15 Inch) | |
| LT4356MPS-2#TRPBF | Material Declaration | Reliability Data | 16-Lead SOIC (Narrow 0.15 Inch) | |
| Wafer Fabrication Data | R568 Reliability Data |
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