Overview
The LT4363HMS-2#PBF, produced by Analog Devices Inc., is a high voltage surge stopper designed to protect loads from high voltage transients. This device regulates the output 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. The LT4363 also supports hot swap and live insertion, making it versatile for various power management scenarios.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 4 | - | 80 | V |
| Output Voltage Regulation | - | 1.275 | - | V |
| Current Limit Sense Voltage | 45 | - | 55 | mV |
| Shutdown Current | - | 7 | - | µA |
| Package Types | - | 12-Pin MSOP, 12-Pin DFN, 16-Pin SO | - | - |
| Operating Temperature Range | -40 | - | 125 | °C |
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)
- Intrinsic safety applications support
- Hot swap and live insertion capabilities
Applications
The LT4363HMS-2#PBF is suitable for a variety of applications, including:
- Avionic and industrial surge protection
- Hot swap and live insertion scenarios
- High side switch for battery-powered systems
- Intrinsic safety applications
- Protection against supply transients and output overload events
Q & A
- What is the primary function of the LT4363HMS-2#PBF?
The primary function is to protect loads from high voltage transients by regulating the output during overvoltage events. - What types of packages are available for the LT4363HMS-2#PBF?
The device is available in 12-Pin MSOP, 12-Pin DFN, and 16-Pin SO packages. - What is the operating temperature range of the LT4363HMS-2#PBF?
The operating temperature range is –40°C to 125°C. - How does the LT4363HMS-2#PBF handle overvoltage conditions?
It regulates the output voltage to a safe level and can turn off the MOSFET if the overvoltage condition persists. - What is the purpose of the adjustable fault timer in the LT4363HMS-2#PBF?
The adjustable fault timer allows the device to ride through short-duration faults while protecting against longer events. - Can the LT4363HMS-2#PBF be used in hot swap applications?
Yes, it supports hot swap and live insertion scenarios. - How does the LT4363HMS-2#PBF protect against overcurrent conditions?
It features an adjustable current limit that protects against output short circuits or excessive load current. - What is the shutdown current of the LT4363HMS-2#PBF?
The shutdown current is typically 7µA. - Is the LT4363HMS-2#PBF suitable for intrinsic safety applications?
Yes, it is designed to support intrinsic safety applications. - How does the retry duty cycle work in the LT4363-2 version?
The LT4363-2 version has a retry duty cycle of less than 1% during faults.
