This document is a datasheet for the SPX431, a programmable reference voltage regulator. Here's a breakdown of the information contained within:

1. Overview & Key Features:

️· Function: The SPX431 provides a stable voltage reference, adjustable via an external resistor. It's often used as a shunt regulator.
️· Programmable Output: The output voltage is set by the value of an external resistor.
️· Low Output Noise: Designed for applications requiring a clean, stable reference voltage.
️· Package Options: Available in various packages including SOT-23, SOT-89, SOIC, and TO-92.
️· Precision: Different versions offer varying degrees of accuracy (0.5% shown in the ordering info).

2. Typical Performance Curves (Figures 1-13):

These graphs illustrate the SPX431’s performance under different conditions. Key characteristics shown include:

️· Output Voltage vs. Load Current: Shows how the output voltage changes with varying load current.
️· Output Noise: Indicates the level of noise present in the output voltage.
️· Dynamic Output Impedance: Shows the impedance of the regulator at different frequencies.
️· Pulse Response: Demonstrates the regulator’s response to pulsed loads.
️· Stability Regions: Illustrates the stable operating conditions (load capacitance, output current).
️· Small Signal Voltage Gain vs. Frequency: Displays how the output signal amplitude changes with the input frequency.

3. Ordering Information:

️· Part Numbers: Provides the ordering numbers for different versions and packages of the SPX431.
️· Precision Levels: Indicates the accuracy of the output voltage.
️· Packages: Specifies the available package options.

4. Contact Information:

️· Sipex Corporation contact details (headquarters and offices).

In essence, this datasheet provides all the necessary technical information for engineers to select, integrate, and utilize the SPX431 in their designs.