The AZ431BN-ATR is a precision adjustable shunt regulator manufactured by BCD Semiconductor Manufacturing Limited. It is designed for use in various voltage regulation applications, offering a stable and accurate reference voltage. The device is known for its low temperature coefficient and high accuracy, making it suitable for demanding applications.

Applications:

• Linear Regulators: Used as a reference voltage in linear voltage regulators.
• Switching Power Supplies: Provides feedback voltage control in switching power supplies.
• Voltage Monitors: Employed in voltage monitoring circuits for over-voltage and under-voltage detection.
• Current Sources: Used to create stable current sources.
• Precision References: Used in precision reference circuits for instrumentation and measurement.

Features:

• Reference Voltage: 2.5V ±1%
• Adjustable Output Voltage: Vref to 36V
• Low Temperature Coefficient: Typically 10 ppm/°C
• Sink Current Capability: 1mA to 100mA
• Low Dynamic Output Impedance: Typically 0.2 Ω
• Package: SOT-23
• Operating Temperature Range: -40°C to +125°C

Benefits:

• High Accuracy: Provides a precise reference voltage for accurate regulation.
• Adjustable Output: Offers flexibility in setting the output voltage.
• Low Temperature Drift: Ensures stable performance over a wide temperature range.
• Wide Operating Voltage: Can operate with input voltages up to 36V.
• Small Package: SOT-23 package saves board space.

Additional Details:

The AZ431BN-ATR shunt regulator operates as a voltage reference and error amplifier. By using external resistors, the output voltage can be adjusted to any value between Vref (2.5V) and 36V. The device requires a minimum cathode current of 1mA to maintain regulation. The low dynamic output impedance ensures stable operation even with varying load conditions. The SOT-23 package is compact and suitable for surface-mount applications. The device is stable with capacitive loads, making it easy to use in a variety of circuits. Its high accuracy and stability make it a preferred choice for precision voltage regulation and reference applications. The AZ431 series are widely used and readily available, providing a cost-effective solution for voltage regulation needs.