Overview
The NCP382LD15AAR2G is a high-side power-distribution switch designed by onsemi, specifically tailored for applications involving heavy capacitive loads and potential short-circuits. This device features a single input with dual outputs, integrating an 80 mΩ P-channel MOSFET. It is designed to protect the input supply voltage by limiting the output current to a fixed threshold, preventing overcurrent and overtemperature conditions. The NCP382LD15AAR2G includes advanced features such as soft-start, undervoltage lockout, and thermal shutdown protection, making it suitable for a variety of electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VIN) | 2.5 | 5.5 | V | |
| Current Limit (IOCP) | 1.5 | 2.0 | A | |
| Static Drain-Source On-State Resistance (RDS(on)) | 80 | 110 | 140 | mΩ |
| Output Rise Time (TR) | 0.3 | 1.0 | 1.5 | ms |
| Output Fall Time (TF) | 0.1 | 0.5 | ms | |
| Enable Input Voltage (VENx) | 0.4 | 1.2 | V | |
| Maximum Junction Temperature (TJ) | -40 | 125 | °C | |
| Thermal Shutdown Threshold (TSD) | 140 | °C |
Key Features
- Fixed Current Limiting: Limits output current to 1.5 A to prevent overcurrent conditions.
- Soft-Start: Prevents inrush current during startup.
- Undervoltage Lockout (UVLO): Ensures the output remains disconnected until the input voltage is above a specified threshold.
- Thermal Protection: Includes thermal shutdown and regulation to prevent overheating.
- Soft Turn-Off: Reduces current consumption when the device is turned off.
- Enable Active High or Low: Allows the device to be controlled by either a high or low logic signal.
- FLAG Indicator: Provides an active-low open-drain output that asserts low during overcurrent or overtemperature conditions.
- ESD Protection: Compliant with IEC61000-4-2 (Level 4) and Human Body Model (HBM) ESD ratings.
Applications
- Laptops: For power management in laptop systems.
- USB Ports/Hubs: To protect against overcurrent and short-circuit conditions in USB applications.
- TVs and Other Consumer Electronics: For reliable power distribution and protection.
Q & A
- What is the operating voltage range of the NCP382LD15AAR2G?
The operating voltage range is from 2.5 V to 5.5 V.
- What is the maximum current limit for the NCP382LD15AAR2G?
The maximum current limit is 1.5 A.
- What is the purpose of the soft-start feature in the NCP382LD15AAR2G?
The soft-start feature prevents inrush current during startup.
- How does the undervoltage lockout (UVLO) function in the NCP382LD15AAR2G?
The UVLO ensures the output remains disconnected until the input voltage is above a specified threshold, providing noise immunity to transient conditions.
- What is the thermal shutdown threshold for the NCP382LD15AAR2G?
The thermal shutdown threshold is 140°C.
- How is the enable input controlled in the NCP382LD15AAR2G?
The enable input can be controlled by either a high or low logic signal.
- What is the purpose of the FLAG indicator in the NCP382LD15AAR2G?
The FLAG indicator is an active-low open-drain output that asserts low during overcurrent or overtemperature conditions.
- What are the ESD protection ratings for the NCP382LD15AAR2G?
The device is compliant with IEC61000-4-2 (Level 4) and Human Body Model (HBM) ESD ratings.
- What are some typical applications for the NCP382LD15AAR2G?
Typical applications include laptops, USB ports/hubs, and TVs.
- How does the NCP382LD15AAR2G handle short-circuit conditions?
The device switches into a constant current regulation mode when the output current exceeds the IOCP threshold, and it enters an on-phase/off-phase loop to handle high thermal dissipation.
