AP432ASAG-7

Overview

The AP432ASAG-7 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It features an internal reference voltage of 1.24V with a tolerance of ±0.5%. The device supports a cathode current range from -10mA to +250mA and operates within a temperature range of -20°C to +85°C. Output voltage is programmable up to 20V using external resistors. It offers a dynamic output impedance of 0.2Ω, a minimum regulation current of 150µA, and a temperature coefficient of 30ppm/°C.

Feature Summary

• Provides precise reference voltage with tight manufacturing tolerance
• Enables programmable output voltage via external resistor divider network
• Features fast turn-on response and low dynamic output impedance
• Operates as a stable shunt regulator across extended commercial temperatures

Applications

• Voltage monitoring circuits
• Over-voltage and under-voltage protection systems
• Constant-current sink applications
• Crowbar circuit implementations

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package marking codes match the SOT23 designation for this specific suffix. Ensure compliance with RoHS directives and check for Halogen-free status if required by assembly specifications. Validate that the design accommodates the recommended AZ431L replacement due to obsolescence status.

Selection Notes

Select this component when a high-accuracy reference with ±0.5% tolerance is required in a compact surface-mount footprint. Consider the 200mA sink capability for moderate load regulation needs. Evaluate stability boundaries regarding load capacitance before implementation. Verify thermal dissipation requirements against the specified power ratings for the SOT23 package.

Part Context

This part belongs to the AP432 family of adjustable precision shunt regulators designed to replace Zener diodes. It utilizes active output circuitry for sharp turn-on characteristics. The manufacturer explicitly recommends the AZ431L as a preferred alternative for new designs, indicating this model is not recommended for new design inclusion.

Replacement Considerations

Public documentation identifies the AZ431LANTR-E1 as a similar substitute part number available from the same manufacturer.