Overview
The NCP380LSN10AAT1G, 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 various packages, including UDFN6, TSOP-5, and TSOP-6. It features adjustable or fixed current limiting, soft-start circuitry, and comprehensive protection mechanisms such as overcurrent, undervoltage lockout, thermal shutdown, and reverse voltage protection.
Key Specifications
| Parameter | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Operational Power Supply | VIN | 2.5 | - | 5.5 | V |
| Ambient Temperature Range | TA | -40 | - | 85 | °C |
| Junction Temperature Range | TJ | -40 | - | 125 | °C |
| Current Limit (Fixed) | IOCP | 0.5 A, 1 A, 1.5 A, 2 A, 2.1 A | - | - | A |
| Current Limit (Adjustable) | IOCP | 500 mA to 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
- 2.5 V – 5.5 V Operating Range
- 70 mΩ High-side MOSFET
- Current Limit: 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)
- Built-in Soft-start
- Thermal Protection
- Soft Turn-off
- Reverse Voltage Protection
- Enable Active High or Low (EN or EN)
- Compliance to IEC61000-4-2 (Level 4)
- UL Listed − File No. E343275 (NCP Versions Only)
- Pb-Free Devices
Applications
- Laptops
- USB Ports/Hubs
- TVs
Q & A
- What is the operating voltage range of the NCP380LSN10AAT1G?
The operating voltage range is from 2.5 V to 5.5 V.
- How is the current limit set on the NCP380LSN10AAT1G?
The current limit can be set either by using an external resistor for adjustable versions or is fixed at specific values (500 mA, 1 A, 1.5 A, 2 A, 2.1 A) for fixed versions.
- What protection mechanisms are included in the NCP380LSN10AAT1G?
The device includes overcurrent protection, undervoltage lockout, thermal shutdown, and reverse voltage protection.
- How does the soft-start feature work in the NCP380LSN10AAT1G?
The soft-start circuitry limits large current and voltage surges during startup, preventing damage to the device and connected components.
- What is the purpose of the FLAG pin in the NCP380LSN10AAT1G?
The FLAG pin is an open-drain output that asserts low during overcurrent, reverse-voltage, or overtemperature conditions, providing a signal to the system to indicate a fault.
- What are the typical applications for the NCP380LSN10AAT1G?
Typical applications include laptops, USB ports/hubs, and TVs.
- Is the NCP380LSN10AAT1G compliant with any specific standards?
Yes, it is compliant with IEC61000-4-2 (Level 4) and UL Listed − File No. E343275 for NCP versions.
- How does the thermal shutdown mechanism work in the NCP380LSN10AAT1G?
The thermal shutdown turns off the power MOSFET if the die temperature exceeds 140°C, and it remains off until the temperature cools down to 115°C.
- What is the significance of the reverse voltage protection in the NCP380LSN10AAT1G?
The reverse voltage protection disconnects the output if the output voltage exceeds the input voltage, protecting the power supply from reverse voltage conditions.
- How is the enable input controlled in the NCP380LSN10AAT1G?
The enable input can be driven by a logic signal (CMOS or TTL compatible) and can be either active high or low to turn the device on or off.
