Overview
The NCP45560IMNTWG-H is a load switch device from onsemi, designed to provide an efficient and area-reducing solution for power domain switching. This device integrates advanced control functionality with an ultra-low on-resistance N-Channel MOSFET, making it ideal for power management and hot-swap applications. It features soft-start via controlled slew rate, power good signaling, and various system safeguards such as thermal shutdown, undervoltage lockout, and short-circuit protection. This cost-effective solution is optimized for low power consumption in a small footprint.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| MOSFET On-Resistance (RON) | VCC = 3.3 V; VIN = 1.8 V | 4.1 | 5.0 | 6.8 | mΩ |
| Leakage Current (ILEAK) | VEN = 0 V; VIN = 13.5 V | 0.1 | 1.0 | 1.0 | μA |
| Supply Standby Current (ISTBY) | VEN = 0 V; VCC = 3 V | 0.65 | 2.0 | 4.5 | μA |
| Supply Dynamic Current (IDYN) | VEN = VCC = 3 V; VIN = 12 V | 280 | 400 | 750 | μA |
| EN Input High Voltage (VIH) | VCC = 3 V - 5.5 V | 2.0 | V | ||
| EN Input Low Voltage (VIL) | VCC = 3 V - 5.5 V | 0.8 | V | ||
| Thermal Shutdown Threshold (TSDT) | VCC = 3 V - 5.5 V | 145 | °C | ||
| Undervoltage Lockout Threshold (VUVLO) | VCC = 3 V | 0.25 | 0.35 | 0.45 | V |
Key Features
- Advanced Controller with Charge Pump: Provides integrated control functionality.
- Integrated N-Channel MOSFET with Ultra Low RON: Offers low on-resistance for efficient power switching.
- Input Voltage Range: 0.5 V to 13.5 V.
- Soft-Start via Controlled Slew Rate: Limits inrush current and enables hot-swap applications.
- Adjustable Slew Rate Control: Allows customization of the slew rate using an external capacitor.
- Power Good Signal: Indicates when the gate of the MOSFET is fully charged.
- Thermal Shutdown: Protects the device from excessive temperatures.
- Undervoltage Lockout: Turns off the MOSFET when the input voltage is below a certain threshold.
- Short-Circuit Protection: Protects against sudden high-current events.
- Extremely Low Standby Current: Minimizes power consumption when the device is in standby mode.
- Load Bleed (Quick Discharge): Quickly discharges the load when the device is turned off.
Applications
The NCP45560IMNTWG-H is suitable for various applications requiring efficient power domain switching, including:
- Power Management: Ideal for managing power in systems that require low power consumption and high efficiency.
- Hot-Swap Applications: Enables safe and controlled insertion and removal of power modules without disrupting the system.
- Power Sequencing: Supports any power sequence, with recommended sequences to achieve optimal performance.
- Backplane and Removable Card Systems: Used in systems where cards or modules need to be inserted or removed while the system is powered on.
Q & A
- What is the input voltage range of the NCP45560IMNTWG-H?
The input voltage range is from 0.5 V to 13.5 V.
- What is the purpose of the soft-start feature in the NCP45560IMNTWG-H?
The soft-start feature limits the inrush current caused by capacitor charging, enabling the device to be used in hot-swap applications.
- How does the power good signal work in the NCP45560IMNTWG-H?
The power good signal is an active-high, open-drain output that indicates when the gate of the MOSFET is fully charged. It requires an external pull-up resistor.
- What is the thermal shutdown threshold of the NCP45560IMNTWG-H?
The thermal shutdown threshold is 145°C.
- How does the undervoltage lockout work in the NCP45560IMNTWG-H?
The undervoltage lockout turns off the MOSFET and activates the load bleed when the input voltage (VIN) is less than or equal to the undervoltage lockout threshold.
- What is the purpose of the short-circuit protection in the NCP45560IMNTWG-H?
The short-circuit protection helps protect the device and the system from sudden high-current events, such as the output being shorted to ground.
- How can the slew rate be adjusted in the NCP45560IMNTWG-H?
The slew rate can be adjusted by adding an external capacitor between the SR pin and ground. The slew rate is determined by the equation: Slew Rate = KSR / CSR.
- What are the recommended power sequences for the NCP45560IMNTWG-H?
The recommended power sequences are VCC → VIN → VEN or any other sequence that ensures the specified performance is achieved.
- What is the standby current of the NCP45560IMNTWG-H?
The standby current is between 0.65 μA and 4.5 μA, depending on the VCC voltage.
- How does the load bleed function work in the NCP45560IMNTWG-H?
The load bleed quickly discharges the load when the device is turned off, helping to reduce the time it takes for the output voltage to drop to a safe level.
