The SPX1431M5 is a precision adjustable shunt regulator manufactured by Sipex Corporation (later acquired by Exar, then by MaxLinear). It functions similarly to a Zener diode but offers higher precision and adjustability. It's designed to provide a stable voltage reference for various analog and digital circuits. Its key feature is its ability to be adjusted to a wide range of output voltages using external resistors.

Applications:

• Linear Regulators
• Switching Power Supplies
• Voltage Monitoring
• Current Source
• Error Amplifier

Features:

• Adjustable Output Voltage: Can be set to any voltage between Vref (typically 2.5V) and 36V with external resistors.
• Low Temperature Coefficient: Provides stable voltage reference over a wide temperature range.
• Low Output Noise: Suitable for sensitive analog circuits.
• Sink Current Capability: Can sink up to 100mA.
• Wide Operating Current Range: Operates effectively from 1mA to 100mA.

Benefits:

• Precise Voltage Reference: Provides accurate and stable voltage for critical circuits.
• Flexible Output Voltage: Adjustable output accommodates diverse application requirements.
• Improved System Performance: Low noise and temperature coefficient enhance overall system stability.
• Simplified Design: Reduces component count and simplifies circuit design.
• Cost-Effective Solution: Provides high performance at a competitive price.

Additional Details:

The SPX1431M5 has a typical reference voltage (Vref) of 2.5V. The operating temperature range is typically -40°C to +85°C. The device is available in a SOT-23-5 package. The output voltage is set by two external resistors connected as a voltage divider between the output and the reference input. The accuracy of the output voltage depends on the tolerance of the external resistors. The SPX1431 is commonly used in applications where a precise and stable voltage reference is required, such as in power supplies, instrumentation, and control systems. The M5 in the part number refers to the SOT-23-5 package. The device is RoHS compliant.