LM431CIZ/LFT1

Voltage Reference Overview

The LM431CIZ/LFT1 is an adjustable precision Zener shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 37 V and features an initial accuracy of 0.5%. The device supports a maximum shunt current of 100 mA with a temperature coefficient of 50 ppm/°C. Designed for through-hole mounting in a TO-92-3 package, it functions reliably across an operating temperature range from -40°C to +85°C.

Voltage Reference Feature Summary

• Provides adjustable precision voltage reference functionality via shunt regulation architecture
• Delivers high initial accuracy of 0.5% for precise circuit control applications
• Operates over a wide output voltage range from 2.495 V up to 37 V

Voltage Reference Applications

• Precision voltage reference circuits requiring stable shunt regulation
• Adjustable power supply feedback loops
• Comparator reference voltage generation

Voltage Reference Procurement Notes

Verify the specific suffix LFT1 against official Texas Instruments documentation to confirm packaging details and RoHS compliance status. Ensure the TO-92-3 through-hole package matches the target PCB footprint requirements. Cross-reference the 0.5% accuracy grade (C) with design specifications to ensure tolerance levels meet system constraints before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a through-hole solution is required for adjustable shunt regulation with tight 0.5% accuracy tolerances. The TO-92-3 package suits prototyping or low-volume assemblies where surface mount space is not a constraint. Verify that the 100 mA current capability aligns with the load requirements of the specific application circuit.

Voltage Reference Part Context

This part belongs to the LM431 family of adjustable precision Zener diodes. These devices serve as versatile alternatives to fixed voltage references, offering programmable output voltages. The LM431 series is widely utilized in power management systems due to its reliability and established performance characteristics in industrial and consumer electronics.

Voltage Reference FAQ

What is the maximum input voltage supported by the LM431CIZ/LFT1?

The maximum series VREF input voltage is 37 V.

Does the LM431CIZ/LFT1 support surface mount installation?

No, the LM431CIZ/LFT1 is designed for through-hole mounting in a TO-92-3 package.