AS431BKTR-G1

Overview

The AS431BKTR-G1 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides programmable output voltage ranging from the internal reference of 2.5V up to a maximum cathode voltage of 36V. The device features a typical temperature coefficient of 20PPM/°C and a reference voltage deviation of 4.5mV over the full operating range. It supports a sink current capacity between 1mA and 100mA with low output impedance. The component operates within an ambient temperature range of -40°C to +125°C and is housed in a SOT-25 surface-mount package.

Feature Summary

• Programmable precise output voltage capability across a wide operational range
• High stability performance under capacitive load conditions
• Low equivalent full-range temperature coefficient for thermal consistency
• RoHS compliant and halogen-free green molding compound packaging

Applications

• Charger circuits
• Voltage adapters
• Switching power supplies
• Graphic cards
• Precision voltage references

Procurement Notes

Verify the specific suffix G1 confirms RoHS compliance and green material status as defined by the manufacturer. Confirm the SOT-25 package designation matches the required footprint. Ensure the B tolerance code corresponds to the 1.0% voltage accuracy requirement for the design. Check for any product change notices or end-of-life notifications prior to finalizing procurement plans.

Selection Notes

Select this component when a stable, adjustable shunt regulator is needed for space-constrained designs requiring the SOT-25 form factor. The 1.0% initial accuracy suits general-purpose regulation where tighter tolerances are unnecessary. Consider the thermal resistance characteristics if high power dissipation is expected in the application environment.

Part Context

This part belongs to the AS431 series of adjustable precision shunt regulators from Diodes Incorporated. The series offers multiple package options including TO92, SOT23, and SOT89. The BKTR-G1 variant specifically denotes the 1.0% tolerance version in the SOT-25 package with tape-and-reel packaging.

Replacement Considerations

AS431BKTR-E1 is listed as an alternative lead-free variant.