LM431ACZXA

Voltage Reference Overview

The LM431ACZXA is a three-terminal adjustable shunt voltage reference manufactured by onsemi. It operates within a supply voltage range of 2.5 V to 36 V and provides an internal reference voltage of approximately 2.495 V. The device features an initial accuracy of ±0.5% and a temperature coefficient of 50 ppm/°C. It supports a maximum cathode current of 100 mA and functions reliably across an operating temperature range from -25°C to +85°C. The component is housed in a TO-92-3 through-hole package.

Voltage Reference Feature Summary

• Provides precise adjustable voltage regulation via external resistors
• Features sharp turn-on characteristics for effective Zener diode replacement
• Maintains thermal stability over commercial temperature ranges

Voltage Reference Applications

• On-board regulation circuits
• Adjustable power supplies
• Switching power supplies

Voltage Reference Procurement Notes

Verify the specific suffix 'XA' against official manufacturer documentation, as standard listings often use 'ACZ'. Confirm availability status, as this variant may be discontinued or restricted. Ensure the required tolerance and package type match the design requirements before ordering.

Voltage Reference Selection Notes

Select this component when a low-cost, high-current shunt regulator with tight initial accuracy is required. The TO-92 package suits through-hole designs. Verify that the 100 mA current limit meets load demands and that the -25°C minimum temperature aligns with environmental conditions.

Voltage Reference Part Context

This part belongs to the LM431 family of adjustable shunt regulators. These devices are widely used as precision references in linear and switching power supplies. The LM431 series serves as a direct functional replacement for Zener diodes in many applications due to its superior impedance and stability.

Voltage Reference Replacement Considerations

Compatible substitutes include the TL431AIZ and LM431CCZ. Verify pinout compatibility and ensure the substitute meets the ±0.5% accuracy requirement. Check if alternative packages like SOT-23 are acceptable for the design.