AZ431AZ-ATRE1 is a precision shunt regulator that ensures thermal stability over a working cycle. This feature ensures thermal stability over the entire operating range. It has sharp turn-on characteristics, low temperature coefficient, and low temperature output impedance, making it a good Zener diode alternative. In practical applications, AZ431AZ-ATRE1 is mainly used in adjustable voltage regulators, such as switching power supplies, chargers, etc.

 

Ⅰ.Specification parameters of AZ431AZ-ATRE1

•Package/Box:TO-92-3
•Output voltage:2.5V to 36V
•Initial accuracy:0.4%
•Temperature coefficient:20 PPM/C
•Series VREF-Input Voltage—Max:40 V
•Shunt current—Max:100 mA
•Minimum operating temperature:-40℃
•Maximum operating temperature:+125℃
•Tolerance:±0.4%
•Current-Cathode:1 mA
•Temperature coefficient:±20 ppm/℃
•Input voltage:≤36 V
•Output voltage (Max):36 V
•Output voltage (Min):2.5 V

 

Ⅱ.Working principle of AZ431AZ-ATRE1

1.Working principle: The working principle of AZ431AZ-ATRE1 is mainly based on the principle of shunt adjustment. It realizes current detection and regulation by shunting the current. When the load current increases, the current flowing through the precision resistor also increases, which causes the voltage across the resistor to increase. After this voltage increases, the output voltage of AZ431AZ-ATRE1 will decrease, thereby reducing the output current and achieving stable output. Similarly, when the load current decreases, the output voltage of AZ431AZ-ATRE1 will increase, thereby increasing the output current and maintaining current stability.

2.Reference voltage source: AZ431AZ-ATRE1 contains a stable reference voltage source internally. The reference voltage source is a circuit or device used in electronic equipment to provide a stable reference voltage. In the AZ431AZ-ATRE1, this voltage reference source usually consists of a precise voltage reference used to provide a stable output voltage. The main function of the reference voltage source is to provide a stable reference voltage to facilitate comparison, amplification or adjustment by other circuits or devices. In the AZ431AZ-ATRE1, the reference voltage source regulates and stabilizes the output voltage through interaction with the external circuit. When the load current changes, the reference voltage source can adjust the output voltage as needed to maintain a stable output of current.

3.Comparator: The internal comparator monitors the difference between the output voltage and the set target voltage.

4.Adjustment: According to the output of the comparator, adjust the working state of the circuit so that the output voltage remains near the set reference voltage.

5.Feedback network: Through the feedback network, changes in the output voltage are passed to the comparator so that the circuit can be adjusted to maintain the output voltage at the desired level.

Ⅲ.Features of AZ431AZ-ATRE1

•Programmable Precise Output Voltage from 2.5V to 36V

•Sink Current Capacity from 1mA to 100mA

•Programmable reference voltage source: AZ431AZ-ATRE1 is a programmable voltage reference source that can provide a stable reference voltage.

•Low drift: AZ431AZ-ATRE1 may have low temperature drift and long time drift, which helps maintain the stability of the output under different temperature and time conditions.

•Over-temperature protection: May have over-temperature protection function to prevent components from overheating.

•Low Temperature Deviation: 4.5mV Typical

•Wide input voltage range: Possibly suitable for a variety of input voltage conditions, making it more flexible in different applications.

•High precision: It has high precision and can provide accurate output voltage.

•Low power consumption: It has lower power consumption characteristics and is suitable for battery-powered devices or low-power applications that require energy efficiency.

•Feedback control: Using feedback mechanism, it can automatically adjust the working status to maintain a stable output voltage.

 

Ⅳ.Application fields of AZ431AZ-ATRE1

1.Power adapter: AZ431AZ-ATRE1 is used to adjust the output voltage of the power adapter to match the power needs of different devices. A power adapter is a device that converts DC power into specific voltage and current to meet the power needs of various electronic devices. In the power adapter, AZ431AZ-ATRE1 can automatically adjust the output voltage by detecting changes in load current to maintain a stable output of current. By using AZ431AZ-ATRE1, the power adapter can automatically adjust according to the power needs of different devices and provide stable output voltage. This helps ensure proper operation and stability of the equipment while extending its service life.

2.Sensor power supply: AZ431AZ-ATRE1 is used to provide stable power supply to the sensor to ensure that the sensor works properly and provides accurate measurement data. A sensor is a device that detects physical quantities and converts them into electrical signals. By using AZ431AZ-ATRE1, a stable reference voltage source can be provided to ensure that the sensor works normally and outputs accurate measurement data. Whether in various fields such as temperature, humidity, pressure, displacement, etc., AZ431AZ-ATRE1 can provide stable power supply for sensors.

3.Voltage regulator: AZ431AZ-ATRE1 can be used as a power supply voltage regulator to provide stable output voltage and is suitable for various electronic equipment. A voltage regulator is an electronic device used to stabilize the output voltage of a power supply against external disturbances or load changes. AZ431AZ-ATRE1 has the characteristics of high precision, low temperature coefficient, low noise, etc. It can provide stable voltage output and is suitable for various electronic equipment that require high-precision power supply. Whether in communications, computers, industrial control, medical and other fields, AZ431AZ-ATRE1 can be used as a power regulator to provide stable power for electronic equipment.

4.Battery charging management: AZ431AZ-ATRE1 can be used in battery charging circuits to provide stable charging voltage. Battery charging management is an important part of ensuring normal charging and use of batteries, and stable charging voltage is one of the key factors to ensure battery charging quality. In the battery charging circuit, AZ431AZ-ATRE1 can be used as a shunt regulator to automatically adjust the output voltage by detecting changes in the battery's charging current and voltage to maintain stable charging current and voltage.

5.Medical equipment: AZ431AZ-ATRE1 can be used in medical equipment that requires high accuracy and stability, such as medical sensors or monitoring equipment. Medical equipment needs to ensure the accuracy and stability of the power supply to ensure normal operation of the equipment and accurate data output.

6.Industrial automation: AZ431AZ-ATRE1 provides stable power supply for industrial control systems to ensure system reliability.

7.Precision measuring instruments: AZ431AZ-ATRE1 is used in measuring instruments that require high-precision voltage reference to ensure the accuracy of measurement results. Precision measuring instruments need to ensure the stability and accuracy of the power supply to avoid the effects of measurement errors and uncertainties.

8.Communication equipment: AZ431AZ-ATRE1 is used to provide stable power supply to ensure the normal operation of communication equipment. Fluctuations or instability in power may cause performance degradation or malfunction of communications equipment.

 

Ⅴ.Absolute Maximum Ratings of AZ431AZ-ATRE1

 

Ⅵ.Electrical Characteristics of AZ431AZ-ATRE1

(@TA=+25°C,unless otherwise specified.)

 

Ⅶ.Correct installation and use of AZ431AZ-ATRE1

•Installation steps:

1.Electrical connection: Connect the pins of AZ431AZ-ATRE1 correctly. Make sure connections meet the manufacturer's recommendations to prevent damage to components.

2.Input voltage: Provide stable input voltage that meets the specifications to ensure the normal operation of AZ431AZ-ATRE1. Check the data sheet for the allowed input voltage range.

3.Output voltage adjustment: If the AZ431AZ-ATRE1 has an adjustable output voltage function, make sure to adjust it correctly as needed.

4.External components: If external components are used in the circuit, such as filter capacitors or adjustment resistors, please select and connect these components correctly according to the recommendations of the data sheet.

•Precautions:

1.Load stability: Consider the impact of load changes on the output. Some power management circuits are sensitive to load changes and require appropriate external capacitors or other circuitry to improve stability.

2.Heat dissipation: Make sure there is sufficient heat dissipation in the working environment of AZ431AZ-ATRE1 to prevent overheating.

3.Filtering: If there is noise on the power input or output, consider adding appropriate filter capacitors or filter circuits to ensure output stability.

4.Pin voltage: Pay attention to the polarity and level of the pin voltage to avoid wrong connections.

5.Overcurrent protection: If the AZ431AZ-ATRE1 has overcurrent protection features, ensure that the circuit design and connections will not trigger this protection.

6.Stability: Consider the stability and accuracy of AZ431AZ-ATRE1, especially in applications that require higher output voltage accuracy.

 

Ⅷ.Protective characteristics of AZ431AZ-ATRE1

1.Overcurrent protection: AZ431AZ-ATRE1 contains an overcurrent protection mechanism to prevent current from exceeding a set safety level. This helps prevent component overload and damage.

2.Low input voltage protection: Monitor low input voltage and take protective measures when the input voltage is lower than a certain threshold to ensure normal operation.

3.Over-temperature protection: It has an over-temperature protection function that can monitor the operating temperature and take measures when the temperature is too high, such as reducing the output or disconnecting the power supply, to prevent components from overheating.

4.Reverse polarity protection: Equipped with reverse power connection protection to prevent damage caused by incorrect power polarity.

5.Short circuit protection: AZ431AZ-ATRE1 is designed with short circuit protection function to prevent damage to components and circuits in the event of an output short circuit.

6.Thermal shutdown: Under extreme temperature conditions, AZ431AZ-ATRE1 will perform thermal shutdown operation to avoid working at high temperatures for a long time.

7.Precise overvoltage protection: When the output voltage exceeds the specified range, AZ431AZ-ATRE1 takes measures to protect components and connected circuits.

Frequently Asked Questions

1.What are the main advantages of using AZ431AZ-ATRE1?
Some advantages include high precision, programmability, feedback control for stability, and a wide input voltage range.

2.What is the reference pin used for in AZ431AZ-ATRE1?
The reference pin (Ref) in AZ431AZ-ATRE1 is used for the reference voltage output.

3.In what type of package is AZ431AZ-ATRE1 typically available?
AZ431AZ-ATRE1 is commonly available in an SOT-23 surface-mount package.