Overview
The LT4363IDE-2#PBF, produced by Analog Devices Inc., is a high voltage surge stopper designed to protect loads from high voltage transients and overcurrent conditions. This device regulates the output voltage during overvoltage events by controlling the gate of an external N-channel MOSFET. It is particularly useful in applications requiring robust surge protection, such as avionic, industrial, and battery-powered systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | - | - | 100 | V |
| Shutdown Current | - | 7 | - | µA |
| UV/OV Comparator Thresholds | Adjustable | - | - | - |
| Current Limit Sense Voltage | 45 | 50 | 55 | mV |
| Fault Timer | Adjustable | - | - | - |
| Package Options | 12-Pin DFN, 12-Pin MSOP, 16-Pin SO | - | - | - |
| Retry Duty Cycle During Faults (LT4363-2) | - | <1% | - | - |
Key Features
- Adjustable UV/OV comparator thresholds
- Low 7µA shutdown current
- Shutdown pin withstands –60V to 100V
- Adjustable fault timer
- Controls N-channel MOSFET
- Less than 1% retry duty cycle during faults (LT4363-2)
- Available in 12-Pin DFN, 12-Pin MSOP, and 16-Pin SO packages
Applications
- Avionic and industrial surge protection
- Hot swap/live insertion
- High side switch for battery-powered systems
- Intrinsic safety applications
Q & A
- What is the primary function of the LT4363IDE-2#PBF?
The primary function is to protect loads from high voltage transients and overcurrent conditions by regulating the output voltage and controlling an external N-channel MOSFET. - What are the package options available for the LT4363IDE-2#PBF?
The device is available in 12-Pin DFN, 12-Pin MSOP, and 16-Pin SO packages. - How does the LT4363IDE-2#PBF handle overvoltage conditions?
During an overvoltage event, the device regulates the GATE pin to maintain a voltage at the FB pin, allowing uninterrupted operation during short overvoltage events. If the condition persists, the timer causes the MOSFET to turn off. - What is the shutdown current of the LT4363IDE-2#PBF?
The shutdown current is 7µA. - Can the fault timer be adjusted?
Yes, the fault timer is adjustable. - What are some common applications of the LT4363IDE-2#PBF?
Common applications include avionic and industrial surge protection, hot swap/live insertion, high side switch for battery-powered systems, and intrinsic safety applications. - How does the device protect against overcurrent conditions?
The device features an adjustable current limit that protects against output short circuits or excessive load current by regulating the GATE pin during an overcurrent event. - What is the significance of the retry duty cycle in the LT4363-2 version?
The retry duty cycle is less than 1% during faults, ensuring minimal repeated attempts to turn on the MOSFET during fault conditions. - How does the shutdown pin withstand voltage?
The shutdown pin can withstand voltages from –60V to 100V. - What is the difference between the LT4363-1 and LT4363-2 versions?
The LT4363-2 version allows the GATE pin to begin rising and turn on the MOSFET when the TMR voltage reaches 0.5V, whereas the LT4363-1 version keeps both the GATE and FLT pins low even after the TMR has reached the 0.5V threshold.
