Overview
The NCP45540IMNTWG-L is a controlled load switch from onsemi, designed to provide an efficient and area-reducing solution for power domain switching. This device features integrated control functionality with ultra-low on-resistance, making it ideal for power management and hot-swap applications. It includes advanced system safeguards such as fault protection and power good signaling, ensuring reliable operation in various environments. The NCP45540IMNTWG-L is particularly suited for applications requiring low power consumption in a small footprint.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 0.5 | - | 13.5 | V |
| Supply Voltage to Controller (VCC) | 3.0 | - | 5.5 | V |
| Output Slew Rate (VCC = 3.3 V, VIN = 1.8 V) | 11.8 | - | - | kV/s |
| Output Turn-on Delay (VCC = 3.3 V, VIN = 1.8 V) | 200 | - | - | μs |
| Thermal Shutdown Threshold | - | - | 145 | °C |
| Undervoltage Lockout Threshold | - | - | - | V (dependent on configuration) |
| Short-Circuit Protection | - | - | - | - |
| Standby Current | - | - | - | nA (extremely low) |
Key Features
- Advanced Controller with Charge Pump: Enhances control and efficiency.
- Integrated N-Channel MOSFET with Low RON: Ultra-low on-resistance for minimal power loss.
- Soft-Start via Controlled Slew Rate: Adjustable slew rate to limit inrush current.
- Power Good Signal: Active-high, open-drain output for system monitoring.
- Thermal Shutdown: Protects against over-temperature conditions.
- Undervoltage Lockout: Ensures the MOSFET turns off when input voltage is below a certain threshold.
- Short-Circuit Protection: Automatically turns off the MOSFET and activates load bleed in case of a short circuit.
- Extremely Low Standby Current: Minimizes power consumption when not in use.
- Load Bleed (Quick Discharge): Rapidly discharges the load when the MOSFET is turned off.
- Pb-Free Device: Compliant with environmental regulations.
Applications
- Portable Electronics and Systems
- Telecom, Networking, Medical, and Industrial Equipment
- Set-top Boxes
- Residential Gateways
- Notebook and Tablet Computers
- Enterprise Servers & Storage
- Hot Swap Devices and Peripheral Ports
- Handheld Devices
Q & A
- What is the input voltage range of the NCP45540IMNTWG-L?
The input voltage range is from 0.5 V to 13.5 V, with 18 V tolerance.
- How does the soft-start feature work?
The soft-start feature is implemented via a controlled slew rate, which can be adjusted using an external capacitor connected to the SR pin.
- What is the purpose of the power good signal?
The power good signal is an active-high, open-drain output that indicates when the gate of the MOSFET is fully driven, and it can be used for power sequencing in the system.
- What types of fault protection does the NCP45540IMNTWG-L offer?
The device offers thermal shutdown, undervoltage lockout, and short-circuit protection.
- How does the thermal shutdown work?
When an over-temperature condition is detected, the MOSFET is immediately turned off, and the load bleed is activated. The device exits thermal shutdown when the junction temperature decreases to a safe operating temperature.
- What is the significance of the undervoltage lockout feature?
The undervoltage lockout turns the MOSFET off and activates the load bleed when the input voltage is below a certain threshold, ensuring safe operation.
- How does the short-circuit protection work?
The short-circuit protection turns off the MOSFET and activates the load bleed if the voltage drop across the MOSFET exceeds a certain threshold, protecting against short circuits.
- What is the standby current of the NCP45540IMNTWG-L?
The standby current is extremely low, minimizing power consumption when the device is not in use.
- Can the NCP45540IMNTWG-L be used in hot-swap applications?
Yes, the device is suitable for hot-swap applications due to its controlled output slew rate and soft-start functionality.
- Is the NCP45540IMNTWG-L a Pb-free device?
Yes, the device is Pb-free, complying with environmental regulations.
