The SPX431LAM1 is a precision adjustable shunt regulator from Exar Corporation. It is designed to function as a low-voltage adjustable reference and is commonly used in diverse electronic circuits for voltage regulation, voltage monitoring, and error amplification. The device distinguishes itself with high accuracy and stability, making it well-suited for applications needing precise voltage control.

Applications

• Switching Power Supplies: Functions as a voltage reference in the feedback loop to regulate the output voltage.
• Linear Regulators: Offers a stable reference voltage for linear regulators to maintain consistent output.
• Voltage Monitors: Incorporated in circuits to monitor voltage levels, triggering alerts or protection mechanisms when voltage deviates from the set range.
• Error Amplifiers: Performs as an error amplifier in control systems to minimize the difference between the actual output and the desired setpoint.
• Instrumentation: Integrated into precision measurement instruments for accurate voltage referencing.

Features

• Adjustable Output Voltage: The output voltage is adjustable from Vref (2.5V) to 36V using two external resistors.
• Low Temperature Coefficient: Enables stable performance over a wide range of temperatures.
• High Accuracy: Provides a tight initial tolerance on the reference voltage.
• Low Output Noise: Minimizes noise in the regulated voltage output.
• Low Dynamic Output Impedance: Provides optimal load regulation.
• Sink Current Capability: Operates with a wide range of cathode current.

Benefits

• Precise Voltage Regulation: Provides accurate and reliable voltage control in circuits.
• Stable Performance: Sustains consistent performance across temperature variations and load changes.
• Versatile Application: Adaptable to a wide variety of voltage regulation and monitoring applications.
• Simplified Circuit Design: Streamlines design and reduces component count.
• Cost-Effective Solution: Delivers high performance at a competitive price.

Additional Details

The SPX431LAM1 is often found in a SOT-89 package. The device has an internal reference voltage of 2.5V. Typical operating temperature range spans from -40°C to +125°C. The device requires a few external components for operation, mainly two resistors to set the desired output voltage. The device functions as a three terminal shunt regulator.