The SPX431JAM1-L/TR is a precision adjustable shunt regulator from Exar Corporation, designed as a low-voltage adjustable reference. It finds common usage in various electronic circuits focused on voltage regulation, voltage monitoring, and error amplification. The device is characterized by its high accuracy and stability, making it a good fit for applications where precise voltage control is a necessity.

Applications

• Switching Power Supplies: As a voltage reference within the feedback loop, regulating output voltage.
• Linear Regulators: Providing a stable reference voltage for linear regulators, maintaining a consistent output.
• Voltage Monitors: Implemented in circuits to monitor voltage levels and trigger alerts or protection mechanisms upon voltage deviations.
• Error Amplifiers: Performing as an error amplifier in control systems to reduce the difference between the desired setpoint and actual output.
• Instrumentation: Employed in precision measurement instruments for accurate voltage referencing.

Features

• Adjustable Output Voltage: The output voltage can be adjusted from Vref (2.5V) to 36V using two external resistors.
• Low Temperature Coefficient: Stable performance across a wide temperature range.
• High Accuracy: Close initial tolerance on the reference voltage.
• Low Output Noise: Minimizes noise in the regulated voltage output.
• Low Dynamic Output Impedance: Provides good load regulation.
• Sink Current Capability: Functions with a variety of cathode current.

Benefits

• Precise Voltage Regulation: Facilitates accurate and reliable voltage control.
• Stable Performance: Delivers consistent performance, even with changing temperature and load.
• Versatile Application: Wide range of voltage regulation and monitoring applications.
• Simplified Circuit Design: Lowers component count and helps circuit design.
• Cost-Effective Solution: High-performance voltage reference at a good price.

Additional Details

The SPX431JAM1-L/TR is available in a SOT-23 package. It has a 2.5V internal reference voltage. The operating temperature usually spans -40°C to +125°C, suitable for use in industrial situations. The device needs only a few external components for operation; normally, two resistors are used to adjust the output voltage. It's a shunt regulator with three terminals.