Overview
The LT4356HDE-2#PBF, produced by Analog Devices Inc., is a surge stopper designed to protect loads from high voltage transients. This component is particularly useful in applications where overvoltage events, such as load dump in automobiles, need to be managed. It regulates the output voltage during such events by controlling the gate of an external N-channel MOSFET, ensuring the load continues to function safely.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Operating Voltage Range | 4 | 80 | V | ||
| VCC Supply Current (LT4356-2) | VSHDN = 0V, IN+ = 1.3V | 60 | 100 | 250 | µA |
| Reverse Input Current | VSNS = VCC = –30V, SHDN Open | 0.3 | 0.8 | 1 | mA |
| GATE Pin Output High Voltage | VCC = 4V; (VGATE – VOUT) | 4.5 | 10 | 16 | V |
| GATE Pin Pull-Up Current | VGATE = 12V; VCC = 12V | -4 | -4.5 | -23 | µA |
| Shutdown Current | VSHDN = 0V | 7 | µA | ||
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Stops high voltage surges and regulates output during overvoltage events
- Adjustable output clamp voltage
- Overcurrent protection with internal amplifier limiting current sense voltage to 50mV
- Wide operation range: 4V to 80V
- Reverse input protection to –60V
- Low 7µA shutdown current
- Auxiliary amplifier for level detection, comparator, or linear regulator controller (LT4356-2)
- Adjustable fault timer
- Controls N-channel MOSFET
- Shutdown pin withstands –60V to 100V
- Fault output indication
- Guaranteed operation to 125°C
- Available in 12-Pin DFN, 10-Pin MSOP, or 16-Pin SO packages
Applications
- High side switch for battery-powered systems
- Intrinsic safety applications
- Automotive systems to protect against load dump
- Industrial and automotive power systems requiring overvoltage and overcurrent protection
Q & A
- What is the primary function of the LT4356HDE-2#PBF? The primary function is to protect loads from high voltage transients by regulating the output during overvoltage events.
- What types of overvoltage events does it protect against? It protects against events such as load dump in automobiles.
- How does it regulate the output voltage? It controls the gate of an external N-channel MOSFET to limit the output voltage to a safe value.
- What is the operating voltage range of the LT4356HDE-2#PBF? The operating voltage range is from 4V to 80V.
- Does it offer overcurrent protection? Yes, it includes overcurrent protection with an internal amplifier limiting the current sense voltage to 50mV.
- What is the shutdown current of the LT4356HDE-2#PBF? The shutdown current is 7µA.
- What are the available package options for the LT4356HDE-2#PBF? It is available in 12-Pin DFN, 10-Pin MSOP, or 16-Pin SO packages.
- What is the operating temperature range of the LT4356HDE-2#PBF? The operating temperature range is from –40°C to 125°C.
- Does it have an adjustable fault timer? Yes, it features an adjustable fault timer.
- How does it indicate faults? It indicates faults through a fault output pin.
