Overview
The NCP45560IMNTWG-L is a load switch 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 | - | mΩ |
| MOSFET On-Resistance (RON) | VCC = 3.3 V; VIN = 5 V | 4.3 | 5.3 | - | mΩ |
| MOSFET On-Resistance (RON) | VCC = 3.3 V; VIN = 12 V | 4.9 | 6.8 | - | mΩ |
| Leakage Current (ILEAK) | VEN = 0 V; VIN = 13.5 V | 0.1 | 1.0 | - | μA |
| Supply Standby Current (ISTBY) | VEN = 0 V; VCC = 3 V | 0.65 | 2.0 | - | μA |
| Supply Dynamic Current (IDYN) | VEN = VCC = 3 V; VIN = 12 V | 280 | 400 | - | 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 |
| PG Output Low Voltage (VOL) | VCC = 3 V; ISINK = 5 mA | - | - | 0.2 | V |
| Junction Temperature (TJ) | - | -40 | - | 125 | °C |
Key Features
- Advanced Controller with Charge Pump: Enhances the device's control capabilities.
- Integrated N-Channel MOSFET with Ultra Low RON: Provides low on-resistance for efficient power switching.
- Input Voltage Range: 0.5 V to 13.5 V, making it versatile for various applications.
- 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, useful for power sequencing.
- 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 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-L is suitable for a variety of applications, including:
- Power Management: Efficient power domain switching and hot-swap capabilities make it ideal for managing power in complex systems.
- Hot-Swap Applications: The soft-start feature and short-circuit protection make it suitable for hot-swap scenarios where devices are inserted or removed while the system is powered on.
- Power Sequencing: The power good signal can be used to ensure proper power sequencing, reducing the need for additional enable signals from the system controller.
- Backplane and Removable Card Systems: Its features are particularly beneficial in systems where cards or modules are frequently inserted or removed.
Q & A
- What is the input voltage range of the NCP45560IMNTWG-L?
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-L?
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-L?
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 to an external voltage source.
- What is the function of the thermal shutdown in the NCP45560IMNTWG-L?
The thermal shutdown protects the device from excessive temperatures by turning off the MOSFET and activating the load bleed when an over-temperature condition is detected.
- How does the undervoltage lockout work in the NCP45560IMNTWG-L?
The undervoltage lockout turns the MOSFET off and activates the load bleed when the input voltage is less than or equal to the undervoltage lockout threshold.
- What is the purpose of the short-circuit protection in the NCP45560IMNTWG-L?
The short-circuit protection monitors and protects against sudden high-current events, such as the output being shorted to ground.
- How can the slew rate be adjusted in the NCP45560IMNTWG-L?
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, where KSR is the slew rate control constant and CSR is the slew rate control capacitor.
- What are the different enable configurations available for the NCP45560IMNTWG-L?
The device comes in two configurations: NCP45560-H (active-high enable) and NCP45560-L (active-low enable).
- What is the typical standby current of the NCP45560IMNTWG-L?
The supply standby current is typically 0.65 μA to 2.0 μA, depending on the VCC voltage.
- What is the junction temperature range for the NCP45560IMNTWG-L?
The junction temperature range is from -40°C to 125°C.
