Overview
The NCP380HMU10AATBG is a high-side power-distribution switch from onsemi, designed to handle applications with heavy capacitive loads and potential short-circuits. This device features an integrated P-channel MOSFET and is available in a UDFN6 package. It is part of the NCP380 series, which includes both fixed and adjustable current-limiting versions. The NCP380HMU10AATBG specifically has a fixed current limit of 1.0 A. The device includes several protection mechanisms such as overcurrent protection, reverse-voltage protection, and thermal shutdown, ensuring robust operation under various conditions.
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 |
| Maximum DC Current | IOUT | - | - | 1.0 | A |
| Static Drain-source On-state Resistance (UDFN Package) | RDS(on) | - | 55 | 75 | mΩ |
| Thermal Shutdown Threshold | TSD | - | - | 140 | °C |
| FLAG Output Low Voltage | VOL | - | 400 | - | mV |
| FLAG Sink Current | ISINK | - | - | 1.0 | mA |
Key Features
- Current Limiting: The device can limit the output current to a desired level, either fixed at 1.0 A or adjustable via an external resistor.
- Overcurrent Protection: Switches into a constant-current regulation mode when the output current exceeds the current-limit threshold or during a short circuit.
- Reverse-Voltage Protection: Disables the power-switch if the output voltage is higher than the input voltage to protect devices on the input side.
- Thermal Shutdown: Turns off the power MOSFET if the die temperature exceeds the thermal shutdown threshold.
- FLAG Indicator: An active-low open-drain output that asserts low during overcurrent, reverse-voltage, or overtemperature conditions.
- Soft Start Circuitry: Limits large current and voltage surges during startup.
- Enable Input: Controlled by a logic enable input that can be active high or low.
Applications
- USB Ports and Hubs: Ideal for protecting USB ports from overcurrent and short-circuit conditions.
- Power Distribution in Consumer Electronics: Suitable for use in various consumer electronics where power distribution and protection are critical.
- Industrial and Automotive Systems: Can be used in industrial and automotive applications where robust power distribution and protection are required.
- Battery-Powered Devices: Helps in managing power distribution and protecting against overcurrent conditions in battery-powered devices.
Q & A
- What is the primary function of the NCP380HMU10AATBG?
The primary function is to act as a high-side power-distribution switch with integrated current limiting and protection features.
- What is the fixed current limit of the NCP380HMU10AATBG?
The fixed current limit is 1.0 A.
- What types of protection does the NCP380HMU10AATBG offer?
It offers overcurrent protection, reverse-voltage protection, and thermal shutdown.
- How is the current limit set for 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?
The FLAG pin is an active-low open-drain output that asserts low during overcurrent, reverse-voltage, or overtemperature conditions.
- What is the thermal shutdown threshold for the NCP380HMU10AATBG?
The thermal shutdown threshold is 140°C.
- How is the enable input controlled?
The enable input can be controlled by a logic signal (CMOS or TTL compatible) and can be active high or low.
- What is the recommended decoupling capacitor for the input and output?
A 1 μF or greater ceramic capacitor is recommended for both the input and output.
- What are the typical applications for the NCP380HMU10AATBG?
Typical applications include USB ports, consumer electronics, industrial systems, and automotive systems.
- What package type is the NCP380HMU10AATBG available in?
The device is available in a UDFN6 package.
