Overview
The LTC4362CDCB-2#TRMPBF, produced by Analog Devices Inc., is a monolithic overvoltage and overcurrent protector designed to safeguard systems operating within the 2.5V to 5.5V range. This component is particularly suited for portable devices that may be powered through various sources, including wall adapters, car battery adapters, and USB ports. It integrates an internal 40mΩ N-channel MOSFET to control the input power supply, ensuring rapid protection against overvoltage transients and overcurrent conditions.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Operating Voltage Range | 2.5V to 5.5V | |
| Internal MOSFET Resistance | 40mΩ | |
| Overvoltage Protection Threshold | 5.8V (VIN(OV)) | |
| Overcurrent Protection Threshold | 1.5A | |
| Response Time to Overvoltage | 1µs | |
| Operating Temperature Range | 0°C to 70°C (LTC4362C), -40°C to 85°C (LTC4362I) | |
| Storage Temperature Range | -65°C to 150°C | |
| Package Type | 8-Lead Plastic DFN (2mm × 3mm) |
Key Features
- Rapid Overvoltage Protection: Turns off the internal MOSFET within 1µs during overvoltage transients to protect downstream components.
- Overcurrent Protection: Implements overcurrent protection with a 1.5A current trip threshold and a 10µs glitch filter.
- Inrush Current Limiting: Features delayed start-up and controlled dV/dt ramp-up to limit inrush current.
- CMOS Compatible ON Input: The part is enabled when the ON input is driven low.
- Automatic Restart (LTC4362-2): Automatically tries to apply power again after a 130ms start-up delay following an overcurrent event.
- Latch Off (LTC4362-1): Maintains the off state until reset by cycling the input voltage below 2.1V.
Applications
- Portable Devices: Suitable for handheld and mobile devices that require protection against various power supply sources.
- Wall Adapters and Car Battery Adapters: Protects devices powered through these sources from overvoltage and overcurrent conditions.
- USB-Powered Devices: Ensures safe operation when devices are powered via USB ports.
Q & A
- What is the primary function of the LTC4362CDCB-2#TRMPBF?
The primary function is to protect 2.5V to 5.5V systems from power supply overvoltage and overcurrent conditions.
- How quickly does the LTC4362 respond to overvoltage transients?
The LTC4362 turns off the internal MOSFET within 1µs during overvoltage transients.
- What is the overcurrent protection threshold of the LTC4362?
The overcurrent protection threshold is 1.5A.
- How does the LTC4362-2 handle overcurrent events?
The LTC4362-2 automatically tries to apply power again after a 130ms start-up delay following an overcurrent event.
- How does the LTC4362-1 handle overcurrent events?
The LTC4362-1 maintains the off state until reset by cycling the input voltage below 2.1V.
- What is the operating temperature range for the LTC4362C and LTC4362I?
The operating temperature range is 0°C to 70°C for LTC4362C and -40°C to 85°C for LTC4362I.
- What type of package does the LTC4362CDCB-2#TRMPBF come in?
The component comes in an 8-Lead Plastic DFN (2mm × 3mm) package.
- How does the LTC4362 handle inrush current?
The LTC4362 features delayed start-up and controlled dV/dt ramp-up to limit inrush current.
- Is the ON input CMOS compatible?
- What is the storage temperature range for the LTC4362?
The storage temperature range is -65°C to 150°C.
