Overview
The LTC4368IDD-2#PBF, produced by Analog Devices Inc., is a highly versatile and robust 100V UV/OV and reverse protection controller with a bidirectional circuit breaker. This component is designed to protect applications from a wide range of power supply anomalies, including overvoltage, undervoltage, and reverse voltage conditions, as well as overcurrent faults in both forward and reverse directions.
It controls the gate voltage of a pair of external N-channel MOSFETs to ensure the load is connected to the input supply only when there are no voltage or current faults. This makes it an essential component for ensuring the reliability and safety of various electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VIN Input Voltage: Operating Range | 2.5 | 60 | V | |
| VIN Input Voltage: Protection Range | -40 | 100 | V | |
| Input Supply Undervoltage Lockout (VIN Rising) | 1.8 | 2.2 | 2.4 | V |
| Input Supply Current: On | 80 | µA | ||
| Input Supply Current: Off (SHDN = 2.5V) | 5 | µA | ||
| Forward Sense Threshold | +50mV | mV | ||
| Reverse Sense Threshold (LTC4368-2) | -3mV | mV | ||
| Operating Ambient Temperature Range | -40 | 85 | °C | |
| Storage Temperature Range | -65 | 150 | °C | |
| Package Type | 10-Lead (3mm × 3mm) Plastic DFN |
Key Features
- Wide Operating Voltage Range: From 2.5V to 60V, with protection up to 100V and reverse supply protection to -40V.
- Bidirectional Electronic Circuit Breaker: With +50mV forward sense threshold and -3mV reverse sense threshold for the LTC4368-2 model.
- Adjustable Thresholds: ±1.5% undervoltage and overvoltage thresholds configurable using an external resistive divider.
- Low Operating Current: 80µA, and low shutdown current of 5µA.
- Control of Back-to-Back N-Channel MOSFETs: Ensures the load is connected to the input supply only when there are no voltage or current faults.
- Hot Swappable Supply Input: Allows for safe insertion and removal of the supply without causing system disruptions.
- Pin-Selectable Overcurrent Auto-Retry Timer or Latchoff: Provides flexibility in handling overcurrent faults.
- AEC-Q100 Qualified for Automotive Applications: Ensures reliability and quality for use in automotive systems.
Applications
- Automotive Systems: Given its AEC-Q100 qualification, it is suitable for various automotive applications requiring robust power protection.
- Industrial Power Systems: Protects against voltage and current faults in industrial power supplies and systems.
- Telecommunications and Networking Equipment: Ensures reliable operation in telecommunications and networking devices by protecting against power anomalies.
- Medical Devices: Provides critical power protection for medical devices that require high reliability and safety standards.
Q & A
- What is the primary function of the LTC4368IDD-2#PBF?
The primary function is to protect applications from power supply voltages that may be too high, too low, or even negative, and from overcurrent faults in both forward and reverse directions.
- What is the operating voltage range of the LTC4368IDD-2#PBF?
The operating voltage range is from 2.5V to 60V, with protection up to 100V and reverse supply protection to -40V.
- How does the LTC4368IDD-2#PBF handle overcurrent faults?
It can either latch off power or retry after a user-adjustable delay following a forward current fault. For reverse current faults, it waits for the output to fall 100mV below the input to reconnect power to the load.
- What is the typical operating current of the LTC4368IDD-2#PBF?
The typical operating current is 80µA, and the shutdown current is 5µA.
- Is the LTC4368IDD-2#PBF suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What type of package does the LTC4368IDD-2#PBF come in?
It comes in a 10-Lead (3mm × 3mm) Plastic DFN package.
- How does the LTC4368IDD-2#PBF protect against reverse voltage conditions?
It provides reverse supply protection to -40V and has a bidirectional electronic circuit breaker with a -3mV reverse sense threshold for the LTC4368-2 model.
- Can the LTC4368IDD-2#PBF be used in hot swap applications?
Yes, it supports hot swappable supply input, allowing for safe insertion and removal of the supply without causing system disruptions.
- How are the overvoltage and undervoltage thresholds adjusted?
The thresholds are adjustable using an external resistive divider, with ±1.5% accuracy.
- What is the storage temperature range for the LTC4368IDD-2#PBF?
The storage temperature range is from -65°C to 150°C.
