Overview
The NCV380HMUAJAATBG is a high-side power distribution switch produced by onsemi, designed to handle applications where heavy capacitive loads and short-circuits are likely to occur. This device incorporates a 70 mΩ P-channel MOSFET and is part of the NCV380 series, which is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other demanding applications. The switch limits the output current to a desired level by switching into a constant-current regulation mode when the output load exceeds the current-limit threshold or a short is present. It also features built-in protection mechanisms such as under-voltage lockout, thermal protection, and reverse voltage protection.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Voltage Range | VIN | 2.5 | - | 5.5 | V |
| Static Drain-source On-state Resistance (DFN Package) | RDS(on) | - | 55 | 75 | mΩ |
| Static Drain-source On-state Resistance (TSOP Package) | RDS(on) | - | 70 | 95 | mΩ |
| Junction Temperature Range | TJ | -40 | - | 125 | °C |
| Ambient Temperature Range | TA | -40 | - | 85 | °C |
| Maximum DC Current (UDFN-6 Package) | IOUT | - | - | 2.1 A | A |
| ESD Withstand Voltage (IEC 61000-4-2) | ESD IEC | - | - | 15 kV (Air), 8 kV (Contact) | kV |
Key Features
- Adjustable and Fixed Current Limit: The current limit can be adjusted between 500 mA and 2.1 A using an external resistor or set to fixed values of 500 mA, 1 A, 1.5 A, 2 A, and 2.1 A.
- Under Voltage Lock-out (UVLO): Prevents the output from being connected to the input until the input voltage is above the UVLO threshold.
- Built-in Soft-start: Limits large current and voltage surges during startup.
- Thermal Protection: Turns off the power MOSFET if the die temperature exceeds the thermal shutdown threshold.
- Reverse Voltage Protection: Disconnects the output if the output voltage exceeds the input voltage to protect the power supply.
- FLAG Logic Output: Asserts low during overcurrent, reverse-voltage, or overtemperature conditions.
- Enable Input: Can be driven by a logic signal (CMOS or TTL compatible) and supports both active high and low configurations.
- Compliance to IEC61000-4-2 (Level 4): Ensures robust ESD protection.
- Pb-Free and RoHS Compliant: Environmentally friendly packaging.
Applications
- Laptops
- USB Ports/Hubs
- TVs
Q & A
- What is the operating voltage range of the NCV380HMUAJAATBG?
The operating voltage range is from 2.5 V to 5.5 V. - How is the current limit set on the NCV380HMUAJAATBG?
The current limit can be set using an external resistor for adjustable versions or is fixed at specific values for fixed versions. - What protection mechanisms are built into the NCV380HMUAJAATBG?
The device includes under-voltage lockout, thermal protection, reverse voltage protection, and overcurrent protection. - 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. - Is the NCV380HMUAJAATBG suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other demanding applications. - What are the package options for the NCV380HMUAJAATBG?
The device is available in UDFN-6, TSOP-5, and TSOP-6 packages. - How does the device handle heavy capacitive loads?
The device limits the output current to the current-limit threshold until the capacitive load is fully charged. - What is the thermal shutdown threshold for the NCV380HMUAJAATBG?
The thermal shutdown threshold is 140°C. - Is the NCV380HMUAJAATBG ESD protected?
Yes, it complies with IEC61000-4-2 (Level 4) and has an ESD withstand voltage of 15 kV (Air) and 8 kV (Contact). - Can the enable input be configured as active high or low?
Yes, the enable input supports both active high and low configurations.
