Overview
The NCV47701PDAJR2G, produced by onsemi, is a 350 mA output current integrated low dropout regulator designed for use in harsh automotive environments. It features a wide operating temperature range and high input voltage tolerance, making it suitable for various automotive applications. The regulator includes adjustable voltage versions, overcurrent protection, overtemperature protection, and an enable input for controlling the output voltage state. It also incorporates an integrated current sense feature for diagnosis and system protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (Vin) | -42 | 45 | V | |
| Output Voltage (Vout) | 5 | 20 | V | |
| Output Current (Iout) | 10 mA | 350 mA | 350 mA | mA |
| Output Voltage Accuracy | -3% | 3% | % | |
| Line Regulation | -0.1% | 1.0% | % | |
| Load Regulation | -0.14% | 1.4% | % | |
| Dropout Voltage (VDO) | 250 mV | 500 mV | mV | |
| Junction Temperature (TJ) | -40°C | 150°C | °C | |
| Storage Temperature (TSTG) | -55°C | 150°C | °C | |
| Enable Input Voltage (VEN) | -42 V | 45 V | V | |
| Current Sense Output (CSO) Voltage | -0.3 V | 7 V | V |
Key Features
- Adjustable Voltage Version: Output voltage adjustable from 5 V to 20 V with ±3% accuracy.
- Enable Input: 5 V logic compatible thresholds for controlling the output voltage state.
- Adjustable Current Limit: Current limit adjustable from 10 mA to 350 mA with 10% accuracy.
- Protection Features: Includes current limitation, thermal shutdown, and reverse input voltage protection.
- Integrated Current Sense: Provides diagnosis and system protection functionality.
- High Peak Input Voltage Tolerance: Can handle input voltages up to 45 V.
- Low Dropout Voltage: Dropout voltage as low as 250 mV.
- Thermal Shutdown: Protects the IC by shutting off at junction temperatures above 150°C.
Applications
- Audio and Infotainment Systems: Suitable for powering audio and infotainment systems in vehicles.
- Instrument Clusters: Used in instrument clusters for stable voltage supply.
- Navigation Systems: Ideal for navigation systems requiring stable and adjustable voltage.
- Satellite Radio: Can be used to power satellite radio systems in automotive environments.
Q & A
- What is the maximum input voltage for the NCV47701?
The maximum input voltage for the NCV47701 is 45 V.
- What is the output current capability of the NCV47701?
The output current capability of the NCV47701 is up to 350 mA.
- How is the output voltage adjusted in the NCV47701?
The output voltage can be adjusted using an external resistor divider connected to the ADJ pin.
- What protection features does the NCV47701 include?
The NCV47701 includes current limitation, thermal shutdown, and reverse input voltage protection.
- What is the purpose of the CSO pin in the NCV47701?
The CSO pin is used for current sense output and setting the current limit.
- What is the thermal shutdown temperature for the NCV47701?
The thermal shutdown temperature for the NCV47701 is typically 150°C.
- How is the enable input used in the NCV47701?
The enable input is used to turn the regulator on or off by setting the voltage to greater than 3.5 V for enable or less than 0.8 V for disable.
- What is the recommended operating temperature range for the NCV47701?
The recommended operating temperature range for the NCV47701 is from -40°C to 150°C.
- What type of capacitor is recommended for the output in the NCV47701?
The output capacitor should be chosen based on cost, availability, size, and temperature constraints, with aluminum electrolytic capacitors being a common choice.
- How does the NCV47701 handle high power applications in terms of thermal management?
The NCV47701's thermal management depends on the PCB design, with good thermal conductivity through the PCB helping to keep the junction temperature low.
