Overview
The LTC4367IMS8#PBF, produced by Analog Devices Inc., is an N-channel MOSFET controller designed to protect loads from faulty supply connections. This device ensures that the load is shielded from input voltages that are too high, too low, or even negative. It operates by controlling the gate of external N-channel power MOSFETs, providing a low-loss connection between the input voltage (VIN) and the output voltage (VOUT) as long as VIN is within the specified range of 3.5V to 18V. The LTC4367 integrates overvoltage, undervoltage, and reverse supply protection, making it a robust solution for various power supply applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Input Voltage: Operating Range | 2.5 | 60 | V | ||
| VIN Input Voltage: Protection Range | -40 | 100 | V | ||
| VIN(UVLO) Input Supply Undervoltage Lockout | VIN Rising | 1.8 | 2.2 | 2.4 | V |
| IVIN Input Supply Current: On | SHDN = 2.5V | 70 | µA | ||
| IVIN Input Supply Current: Off | SHDN = 2.5V | 5 | µA | ||
| FAULT Output Voltage Low | IFAULT = 500µA, VIN = 12V | 0.15 | 0.4 | V | |
| IFAULT FAULT Leakage Current | FAULT = 5V, VIN = 60V | ±200 | nA | ||
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Overvoltage, undervoltage, and reverse supply protection up to 100V and down to -40V.
- High voltage charge pump to enhance the gate of external N-channel power MOSFETs, providing up to 13.1V of gate enhancement.
- Low power consumption: 5µA during shutdown and 70µA while operating.
- Available in 8-lead MSOP and 3mm × 3mm DFN packages.
- Automotive grade versions available with controlled manufacturing for quality and reliability.
Applications
- Protection of loads from faulty supply connections in various power supply systems.
- Cable drop compensation and current limit switches.
- Digital power system management, energy monitors, and hot swap controllers.
- Ideal diode bridges, isolated gate drivers, and power-over-Ethernet (PoE) interface controllers.
- Supervisory circuits and surge stopper, overvoltage, and overcurrent protection).
Q & A
- What is the primary function of the LTC4367?
The LTC4367 is an N-channel MOSFET controller that protects loads from faulty supply connections, including overvoltage, undervoltage, and reverse supply conditions.
- What is the operating voltage range of the LTC4367?
The operating voltage range is from 2.5V to 60V, with protection up to 100V and down to -40V.
- What is the undervoltage lockout threshold for the LTC4367?
The undervoltage lockout threshold is between 1.8V and 2.4V.
- How much current does the LTC4367 consume during operation and shutdown?
The device consumes 70µA during operation and 5µA during shutdown.
- What are the available package types for the LTC4367?
The LTC4367 is available in 8-lead MSOP and 3mm × 3mm DFN packages.
- Does the LTC4367 support automotive applications?
Yes, automotive grade versions of the LTC4367 are available with controlled manufacturing for quality and reliability.
- What is the maximum gate enhancement voltage provided by the LTC4367?
The LTC4367 provides up to 13.1V of gate enhancement to the external N-channel MOSFETs.
- How does the LTC4367 protect against negative input voltages?
The device includes reverse supply protection circuits that automatically isolate the load from negative input voltages.
- What are some common applications of the LTC4367?
Common applications include protection of loads from faulty supply connections, cable drop compensation, digital power system management, and supervisory circuits.
- What is the operating temperature range of the LTC4367?
The operating temperature range is from -40°C to 125°C, depending on the package type.
