Overview
The NIS5420MT4TXG is a cost-effective, resettable electronic fuse (eFuse) produced by onsemi. This device is designed to enhance the reliability of various circuits, including hard drives and other sensitive electronic components, by protecting them from catastrophic and shutdown failures. It features an integrated power device, thermal protection, and overvoltage clamp circuits to ensure continuous operation during transient events.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage, operating, steady-state (VCC to GND) | VIN | -0.6 | - | 18 | V |
| Transient Input Voltage (100 ms) | VIN | -0.6 | - | 25 | V |
| Operating Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Operating Junction Temperature Range | TJ | -40 | - | 150 | °C |
| Continuous Current (TA = 25°C, 100 mm2 copper) | ID | - | - | 4.6 | A |
| Thermal Shutdown Temperature | TSD | 150 | 175 | 200 | °C |
| Undervoltage Lockout (VUVLO1) | VUVLO1 | 7.8 | 8.5 | 9.2 | V |
| Output Clamping Voltage (VClamp2) | VClamp2 | 13.6 | - | 16 | V |
| Kelvin Short Circuit Current Limit (ILim-SS) | ILim-SS | 1.76 | 2.1 | 2.64 | A |
| Kelvin Overload Current Limit (ILim-OL) | ILim-OL | - | - | 4.2 | A |
Key Features
- Integrated Power Device with thermal protection
- No external current shunt required
- 8 V to 18 V input range
- Internal charge pump and undervoltage lockout circuit
- Internal overvoltage clamp to limit output voltage during transients
- ESD ratings: Human Body Model (HBM) 2000 V
- Pb-free, halogen-free/BFR-free, and RoHS compliant
- dv/dt circuit for controlled output voltage ramp
- Load current monitor (for certain models)
- Tri-state enable/fault pin for status indication and shutdown control
Applications
- Hard drives
- Motherboard power management
- Fan drives
- Other sensitive electronic circuits requiring overcurrent and overvoltage protection
Q & A
- What is the primary function of the NIS5420MT4TXG electronic fuse?
The primary function is to protect sensitive circuits from overcurrent and overvoltage conditions, ensuring reliability and continuous operation.
- What is the input voltage range for the NIS5420MT4TXG?
The input voltage range is from 8 V to 18 V.
- Does the NIS5420MT4TXG require an external current shunt?
No, it does not require an external current shunt.
- What is the purpose of the dv/dt circuit in the NIS5420MT4TXG?
The dv/dt circuit controls the slew rate of the output voltage at turn-on, ensuring a linear and controlled ramp-up.
- How does the overvoltage clamp function in the NIS5420MT4TXG?
The overvoltage clamp limits the output voltage during transient events, allowing the load circuit to continue operation without shutdown.
- What is the thermal shutdown temperature for the NIS5420MT4TXG?
The thermal shutdown temperature is between 150°C and 200°C.
- Is the NIS5420MT4TXG RoHS compliant?
- What is the function of the enable/fault pin in the NIS5420MT4TXG?
The enable/fault pin is a tri-state, bidirectional interface used for shutdown control and status indication.
- Can the NIS5420MT4TXG be used in high-temperature environments?
While it can operate up to 125°C ambient temperature, it is not recommended to operate above 150°C for extended periods.
- How does the undervoltage lockout (UVLO) work in the NIS5420MT4TXG?
The UVLO circuit monitors the input voltage and switches the output to a high impedance state if the voltage drops below the specified level.
