Overview
The NCP45521IMNTWG-H is a part of the NCP4552x series of advanced load management controlled load switches produced by onsemi. This device is designed to provide efficient power domain switching with integrated control functionality, ultra-low on-resistance, and various system safeguards. It is ideal for applications requiring low power consumption and a small footprint, making it suitable for a wide range of electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | 3.0 | 5.5 | V | |
| Input Voltage Range (VIN) | 0.5 | 13.5 | V | |
| MOSFET On-Resistance (RON) at VCC = 3.3 V, VIN = 1.8 V | 9.5 | 12.7 | mΩ | |
| MOSFET On-Resistance (RON) at VCC = 3.3 V, VIN = 5 V | 10.1 | 13.9 | mΩ | |
| MOSFET On-Resistance (RON) at VCC = 3.3 V, VIN = 12 V | 12.8 | 22.5 | mΩ | |
| Maximum Steady State Current (IMAX_DC) at Room Ambient Temperature | 10.5 | A | ||
| Thermal Shutdown Threshold | 145 | °C | ||
| Thermal Shutdown Hysteresis | 20 | °C | ||
| Undervoltage Lockout Threshold | 0.25 | 0.35 | 0.45 | V |
| Short-Circuit Protection Threshold | 200 | 265 | 350 | mV |
| Ambient Temperature Range | -40 | 85 | °C | |
| Junction Temperature Range | -40 | 125 | °C |
Key Features
- Advanced Controller with Charge Pump: Provides integrated control functionality.
- Integrated N-Channel MOSFET with Low RON: Offers ultra-low on-resistance.
- Soft-Start via Controlled Slew Rate: Limits inrush current caused by capacitor charging.
- Adjustable Slew Rate Control (NCP45521): Allows for external capacitor adjustment of the slew rate.
- Power Good Signal (NCP45520): Indicates when the gate of the MOSFET is fully charged.
- Thermal Shutdown: Protects the device from excessive temperatures.
- Undervoltage Lockout: Turns the MOSFET off when the input voltage is below a certain threshold.
- Short-Circuit Protection: Monitors and protects against short-circuit conditions.
- Extremely Low Standby Current: Minimizes power consumption in standby mode.
- Load Bleed (Quick Discharge): Quickly discharges the load when the MOSFET is turned off.
Applications
- Portable Electronics and Systems: Suitable for devices requiring efficient power management.
- Notebook and Tablet Computers: Ideal for power domain switching in mobile computing devices.
- Telecom, Networking, Medical, and Industrial Equipment: Used in various industrial and medical applications requiring reliable power management.
- Set-Top Boxes, Servers, and Gateways: Applicable in telecommunications and networking equipment.
- Hot Swap Devices and Peripheral Ports: Enables safe hot-swapping of devices without causing system disruptions.
Q & A
- What is the input voltage range of the NCP45521IMNTWG-H?
The input voltage range is from 0.5 V to 13.5 V. - What is the typical on-resistance of the MOSFET at VCC = 3.3 V and VIN = 1.8 V?
The typical on-resistance is 12.7 mΩ. - What is the maximum steady state current the load switch can pass at room ambient temperature?
The maximum steady state current is 10.5 A. - What is the thermal shutdown threshold of the device?
The thermal shutdown threshold is 145 °C. - Does the device have undervoltage lockout protection?
Yes, the device has undervoltage lockout protection that turns the MOSFET off when the input voltage is below a certain threshold. - How can the slew rate of the NCP45521 be adjusted?
The slew rate can be adjusted by adding an external capacitor between the SR pin and ground. - What is the purpose of the load bleed feature?
The load bleed feature quickly discharges the load when the MOSFET is turned off. - Is the NCP45521IMNTWG-H suitable for hot-swap applications?
Yes, it is suitable for hot-swap applications due to its controlled output slew rate and soft-start functionality. - What is the package type of the NCP45521IMNTWG-H?
The package type is DFN8 (2x2). - Is the device RoHS compliant?
Yes, the device is RoHS compliant.
