Overview
The NCP380LMU05AATBG, produced by onsemi, is a high-side power-distribution switch designed to handle applications with heavy capacitive loads and potential short-circuits. This device integrates a P-channel MOSFET and is available in both fixed and adjustable current-limiting configurations. It protects the input supply voltage by switching into a constant-current regulation mode when the output current exceeds the set threshold or in the event of a short circuit. The device also features built-in soft-start, thermal protection, and reverse voltage protection, making it robust and reliable for various power distribution needs.
Key Specifications
| Parameter | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Operational Power Supply | VIN | 2.5 | - | 5.5 | V |
| Ambient Temperature Range | TA | -40 | 25 | 85 | °C |
| Junction Temperature Range | TJ | -40 | 25 | 125 | °C |
| Current Limit (Adjustable) | - | 500 mA | - | 2.1 A | A |
| Static Drain-source On-state Resistance (DFN Package) | RDS(on) | - | 55 | 75 | mΩ |
| ESD Withstand Voltage (IEC 61000-4-2) | ESD IEC | - | - | 15 kV (Air), 8 kV (Contact) | kV |
| Thermal Shutdown Threshold | TSD | - | - | 140 | °C |
Key Features
- Operating Range: 2.5 V to 5.5 V
- High-side MOSFET: 70 mΩ typical on-state resistance
- Current Limiting: User adjustable from 500 mA to 2.1 A or fixed at 500 mA, 1 A, 1.5 A, 2 A, and 2.1 A
- Under Voltage Lock-out (UVLO): Prevents output connection until input voltage is above the UVLO threshold
- Built-in Soft-start: Limits large current and voltage surges during startup
- Thermal Protection: Thermal shutdown and rearming threshold to prevent overheating
- Reverse Voltage Protection: Disconnects output if output voltage exceeds input voltage
- FLAG Indicator: Active-low open-drain output for overcurrent, reverse-voltage, or overtemperature conditions
- Enable Input: Logic high or low compatible, with optional RC network for delayed enable
- Compliance: IEC61000-4-2 (Level 4) and UL Listed (File No. E343275 for NCP versions)
- Pb-Free Device: Environmentally friendly packaging
Applications
- Laptops
- USB Ports/Hubs
- TVs
Q & A
- What is the operating voltage range of the NCP380LMU05AATBG?
The operating voltage range is from 2.5 V to 5.5 V.
- How is the current limit set on the adjustable version of the NCP380?
The current limit is set using an external resistor connected to the ILIM pin.
- What is the purpose of the FLAG pin on the NCP380?
The FLAG pin is an active-low open-drain output that asserts low during overcurrent, reverse-voltage, or overtemperature conditions.
- Does the NCP380 have built-in thermal protection?
- Is the NCP380 compliant with any specific standards?
- What types of packages are available for the NCP380?
The NCP380 is available in UDFN6, TSOP-5, and TSOP-6 packages.
- How does the NCP380 handle heavy capacitive loads?
The device limits the output current to the set threshold until the capacitive load is fully charged.
- Can the enable input be driven by a logic signal?
- Is the NCP380 suitable for automotive applications?
- What is the typical on-state resistance of the MOSFET in the NCP380?
The typical on-state resistance is 55 mΩ for the DFN package.
