Overview
The LT4363HDE-2#TRPBF, 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 | Value | Unit |
|---|---|---|
| Operating Voltage Range | 4 to 80 | V |
| Minimum Operating Temperature | -40 | °C |
| Maximum Operating Temperature | 125 | °C |
| Shutdown Current | 7 | µA |
| UV Input Threshold | 1.24 to 1.31 | V |
| OV Input Threshold | Varies (adjustable) | V |
| Package Type | 12-Pin (4mm × 3mm) DFN, 12-Pin MSOP, 16-Pin SO | |
| Current Rating | 700 | µA |
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 version)
- Fast overcurrent limit: less than 5µs
- Wide operating voltage range: 4V to 80V
- Adjustable output clamp voltage
Applications
- Avionic and industrial surge protection
- Hot swap/live insertion
- High side switch for battery-powered systems
- Intrinsic safety applications
- Cable drop compensation
- Current limit switches and overvoltage protection
Q & A
- What is the primary function of the LT4363HDE-2#TRPBF?
The primary function of the LT4363HDE-2#TRPBF is to protect loads from high voltage transients and overcurrent conditions by regulating the output voltage and controlling an external N-channel MOSFET.
- What is the operating voltage range of the LT4363HDE-2#TRPBF?
The operating voltage range is from 4V to 80V.
- What are the package options available for the LT4363HDE-2#TRPBF?
The device is available in 12-Pin (4mm × 3mm) DFN, 12-Pin MSOP, and 16-Pin SO packages.
- How does the LT4363HDE-2#TRPBF handle overvoltage conditions?
The device limits the voltage at the output during an overvoltage event by regulating the GATE pin to maintain a set voltage level, and if the condition persists, it turns off the MOSFET to protect the load.
- What is the shutdown current of the LT4363HDE-2#TRPBF?
The shutdown current is 7µA.
- Can the LT4363HDE-2#TRPBF be used in hot swap applications?
- What is the purpose of the adjustable fault timer in the LT4363HDE-2#TRPBF?
The adjustable fault timer allows the device to ride through short-duration faults and shut off the output for longer events to protect the MOSFET pass device from damage.
- How does the LT4363HDE-2#TRPBF 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 overcurrent events.
- What are some typical applications of the LT4363HDE-2#TRPBF?
Typical applications include avionic and industrial surge protection, high side switches for battery-powered systems, and intrinsic safety applications.
- What is the maximum operating temperature of the LT4363HDE-2#TRPBF?
The maximum operating temperature is 125°C.
