Overview
The NCP45520IMNTWG-L is a part of the NCP4552x series of load switches from onsemi, designed to provide an efficient and area-reducing solution for power domain switching. This device integrates advanced control functionality with ultra-low on-resistance, making it ideal for applications requiring low power consumption and a small footprint. The NCP45520IMNTWG-L features a controlled load switch with inrush current limit via soft start, along with system safeguards such as fault protection and power good signaling.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | VCC | 3.0 | 5.5 | V | |
| Input Voltage Range | VIN | 0.5 | 13.5 | V | |
| Output Voltage Range | VOUT | −0.3 | 18 | V | |
| MOSFET On-Resistance (VCC = 3.3 V, VIN = 1.8 V) | RON | 9.5 | 12.7 | mΩ | |
| Leakage Current (VEN = 0 V, VIN = 13.5 V) | ILEAK | 0.1 | 1 | μA | |
| Supply Standby Current (VEN = 0 V, VCC = 3 V) | ISTBY | 0.65 | 2 | μA | |
| Thermal Shutdown Threshold | TSDT | 145 | °C | ||
| Thermal Shutdown Hysteresis | THYS | 20 | °C | ||
| VIN Undervoltage Lockout Threshold | VUVLO | 0.25 | 0.45 | V | |
| Short-Circuit Protection Threshold | VSC | 200 | 350 | mV |
Key Features
- Advanced Controller with Charge Pump
- Integrated N-Channel MOSFET with Low RON
- Soft-Start via Controlled Slew Rate
- Power Good Signal (NCP45520)
- Adjustable Slew Rate Control (NCP45521)
- Thermal Shutdown
- Undervoltage Lockout
- Short-Circuit Protection
- Extremely Low Standby Current
- Load Bleed (Quick Discharge)
Applications
- Portable Electronics and Systems
- Notebook and Tablet Computers
- Telecom, Networking, Medical, and Industrial Equipment
- Set-Top Boxes, Servers, and Gateways
- Hot Swap Devices and Peripheral Ports
Q & A
- What is the input voltage range of the NCP45520IMNTWG-L?
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.
- Does the NCP45520IMNTWG-L have thermal shutdown protection?
- What is the purpose of the load bleed feature?
The load bleed feature allows for quick discharge of the load and is part of the short-circuit protection mechanism.
- How does the enable control work for the NCP45520IMNTWG-L?
The NCP45520IMNTWG-L has an active-low enable control, meaning the MOSFET is enabled when the EN pin is at a logic low level.
- What are the recommended power sequences for the NCP4552x devices?
The recommended power sequences are: 1) VCC → VIN → VEN and 2) VIN → VCC → VEN.
- What is the maximum standby current at VCC = 5.5 V?
The maximum standby current is 4.5 μA.
- Does the NCP45520IMNTWG-L have undervoltage lockout protection?
- What is the short-circuit protection threshold?
The short-circuit protection threshold is between 200 mV and 350 mV.
- Is the NCP45520IMNTWG-L a Pb-free device?
