Overview
The NIS5420MT2TXG is a +12 Volt Electronic Fuse produced by onsemi. This component is designed to enhance the reliability of various circuits by protecting them from catastrophic and shutdown failures. It is particularly useful in applications requiring resettable fuse functionality, such as hard drives and motherboard power management. The device integrates several key features, including an internal power device, thermal protection, and overvoltage clamp circuit, ensuring continuous operation during transients without shutting down the load circuit.
Key Specifications
| Characteristic | Symbol | Min | |||
|---|---|---|---|---|---|
| Input Voltage, operating, steady-state | VIN | -0.6 | - | 18 | V |
| Transient Input Voltage (100 ms) | - | -0.6 | - | 25 | V |
| Operating Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Operating Junction Temperature Range | TJ | -40 | - | 150 | °C |
| Thermal Shutdown Temperature | TSD | 150 | 175 | 200 | °C |
| Continuous Current (TA = 25°C) | ID | - | - | 4.6 | A |
| Kelvin Short Circuit Current Limit | ILim-SS | 1.76 | 2.1 | 2.64 | A |
| Output Clamping Voltage | VClamp1 | 12.5 | - | 14.5 | V |
| Undervoltage Lockout | VUVLO2 | 6 | 6.5 | 7 | V |
| On Resistance (TJ = 140°C) | RDSon | 30 | - | 60 | mΩ |
Key Features
- Integrated Power Device: The NIS5420MT2TXG includes an integrated power device, ensuring a compact and efficient design.
- Thermal Protection: The device features thermal protection with a shutdown temperature of 175°C and thermal hysteresis of 45°C for auto-retry parts.
- Overvoltage Clamp: An overvoltage clamp circuit limits the output voltage during transients, allowing continuous operation of the load circuit.
- Undervoltage Lockout: The device includes an undervoltage lockout circuit to protect against low input voltage conditions.
- Current Limiting: Kelvin short circuit and overload current limits are set using a resistor between the ILimit pin and the source pin.
- Load Current Monitoring: Real-time load current monitoring is available through the ISENSE pin.
- Enable/Fault Pin: A tri-state, bidirectional enable/fault pin serves as both a shutdown control and a status indicator.
- ESD Ratings: Human Body Model (HBM) ESD rating of 2000 V.
- Environmental Compliance: Pb-free, halogen-free/BFR-free, and RoHS compliant.
Applications
- Hard Drives: Protects hard drive circuits from excessive input voltage and other failures.
- Motherboard Power Management: Enhances reliability in motherboard power management systems.
- Fan Drives: Suitable for fan drive applications requiring resettable fuse functionality.
- Other Circuits: General use in any circuit requiring protection from catastrophic and shutdown failures.
Q & A
- What is the primary function of the NIS5420MT2TXG?
The primary function of the NIS5420MT2TXG is to act as a resettable electronic fuse, protecting circuits from excessive input voltage and other failures.
- What is the operating input voltage range for the NIS5420MT2TXG?
The operating input voltage range is from 8 V to 18 V.
- What is the thermal shutdown temperature of the NIS5420MT2TXG?
The thermal shutdown temperature is 175°C.
- How does the overvoltage clamp circuit work?
The overvoltage clamp circuit monitors the output voltage and reduces the gate drive of the main FET if the input voltage exceeds the overvoltage value, allowing operation through transients without shutting down the load circuit.
- What is the purpose of the enable/fault pin?
The enable/fault pin is a tri-state, bidirectional interface that can be used to shutdown the eFuse and also serves as a status indicator for thermal faults.
- Can the NIS5420MT2TXG monitor load current in real-time?
Yes, the device can monitor load current in real-time through the ISENSE pin.
- What are the ESD ratings for the NIS5420MT2TXG?
The ESD ratings are 2000 V according to the Human Body Model (HBM).
- Is the NIS5420MT2TXG environmentally compliant?
Yes, the device is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What are some typical applications for the NIS5420MT2TXG?
Typical applications include hard drives, motherboard power management, and fan drives.
- How does the undervoltage lockout circuit work?
The undervoltage lockout circuit uses a comparator with hysteresis to monitor the input voltage and switches the output to a high impedance state if the input voltage drops below the specified level.
