AN1431T

Overview

The AN1431T is a variable output shunt regulator manufactured by Panasonic Electronic Components. It provides a highly accurate stabilized power supply with an externally adjustable output voltage range of approximately 2.5 to 36V. The device features a high precision reference voltage of 2.5V (±2%) and exhibits high temperature stability at 17ppm/°C typical. Key electrical characteristics include fast rising output, low input impedance of 0.2Ω typical, and low output noise voltage. It operates within a recommended ambient temperature range of -20°C to +85°C.

Feature Summary

• High precision reference voltage
• Externally adjustable output voltage
• Fast rising output characteristic
• Low input impedance

Applications

• Shunt regulator circuits
• Constant current power supplies
• Current bootstrap applications
• Adjustable output regulators combined with 3-pin regulators

Procurement Notes

Verify the specific package type required for your design, as the AN1431T is available in SSIP003-P-0000 (standard) and HSIP003-P-0000B packages. Note that lead-free versions exist under different package codes (SSIP003-P-0000S and HSIP003-P-0000Q). Confirm the latest product status and specifications directly with Panasonic before finalizing procurement, as specifications are subject to change without notice.

Selection Notes

Select the AN1431T when a stable, adjustable voltage reference is needed within the 2.5V to 36V range. Ensure the operating environment stays within the -20°C to +85°C temperature limit. Consider the thermal dissipation requirements, as the standard board power dissipation is limited to 650mW. Verify that the external resistor network allows for the desired output voltage setting based on the internal 2.5V reference.

Part Context

The AN1431T belongs to a family of variable output shunt regulators produced by Panasonic Semiconductor. It serves as a replacement or alternative to Zener diodes in applications requiring precise voltage regulation. The component is designed for general electronic equipment such as office equipment, communications gear, and measuring instruments, rather than specialized aerospace or life-support systems.

Replacement Considerations

Public confirmed substitute part numbers: None listed in source material.