Overview
The LTC4362IDCB-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 utilize multiple power supply options, including wall adapters, car battery adapters, and USB ports. It features an internal 40mΩ N-channel MOSFET and an internal sense resistor for overcurrent protection, ensuring robust protection against power supply overvoltage and overcurrent conditions.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage Range | 2.5V to 5.5V |
| Overvoltage Protection | Up to 28V |
| Internal MOSFET Resistance | 40mΩ |
| Overcurrent Protection Threshold | 1.5A |
| Glitch Filter | 10µs |
| Operating Temperature Range | –40°C to 85°C (LTC4362I) |
| Storage Temperature Range | –65°C to 150°C |
| Package Type | 8-Lead Plastic DFN (2mm × 3mm) |
| Maximum Junction Temperature | 125°C |
| Thermal Resistance (θJA) | 64°C/W |
Key Features
- Internal 40mΩ N-channel MOSFET for overvoltage protection
- Overcurrent protection with a 1.5A current trip threshold and a 10µs glitch filter
- Delayed start-up and controlled dV/dt ramp-up for inrush current limiting
- CMOS compatible ON input for enabling/disabling the device
- Avalanche-rated MOSFET that requires no input transient voltage suppressors or other external components
- Cable drop compensation to handle inductive cable transients
Applications
The LTC4362IDCB-2#TRMPBF is ideal for various portable and embedded systems that require robust power protection. These include:
- Portable electronic devices such as smartphones, tablets, and laptops
- Automotive systems using car battery adapters
- USB-powered devices and peripherals
- Industrial control systems and automation equipment
- Medical devices requiring reliable power protection
Q & A
- What is the operating voltage range of the LTC4362IDCB-2#TRMPBF?
The operating voltage range is 2.5V to 5.5V. - What is the maximum overvoltage protection provided by this component?
The component provides overvoltage protection up to 28V. - What is the resistance of the internal N-channel MOSFET?
The internal N-channel MOSFET has a resistance of 40mΩ. - How does the LTC4362IDCB-2#TRMPBF handle overcurrent conditions?
The component features an internal sense resistor that implements overcurrent protection with a 1.5A current trip threshold and a 10µs glitch filter. - What is the operating temperature range of the LTC4362I version?
The operating temperature range is –40°C to 85°C. - What type of package does the LTC4362IDCB-2#TRMPBF come in?
The component comes in an 8-Lead Plastic DFN package (2mm × 3mm). - How does the device handle inrush current during start-up?
The device features delayed start-up and controlled dV/dt ramp-up for inrush current limiting. - Is the LTC4362IDCB-2#TRMPBF compatible with CMOS inputs?
Yes, the component has a CMOS compatible ON input for enabling/disabling the device. - What happens when the overcurrent comparator trips?
When the overcurrent comparator trips, the internal MOSFET is turned off quickly, and the PWRGD pull-down releases. The LTC4362-2 automatically tries to apply power again after a 130ms start-up delay, while the LTC4362-1 latches off until reset. - How do you reset the latch in the LTC4362-1 after an overcurrent event?
To reset the latch, cycle the IN pin below 2.1V (VIN(UVL)).
