LT1431CN8#PBF

Voltage Reference Overview

The LT1431CN8#PBF is an adjustable shunt voltage regulator manufactured by Analog Devices Inc. It features a guaranteed 0.4% initial reference voltage tolerance and operates within a temperature range of 0°C to 70°C. The device provides a nominal internal current limit of 100mA, with a minimum operating current of 1mA. It supports output voltages between 2.5V and 36V when configured with external resistors. The component utilizes an 8-lead plastic DIP package.

Voltage Reference Feature Summary

• Adjustable shunt voltage regulation with high initial accuracy
• Internal divider resistors enable standalone 5V operation without external components
• Low reference pin input bias current for minimal loading effects
• Fast turn-on response suitable for dynamic power supply applications

Voltage Reference Applications

• Linear regulators
• Adjustable power supplies
• Switching power supplies

Voltage Reference Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish compliance. Confirm the N8 package designation corresponds to the 8-lead plastic DIP form factor. Ensure the 'C' grade matches the required 0°C to 70°C ambient operating temperature range for the target design environment.

Voltage Reference Selection Notes

Select this component for designs requiring precise shunt regulation with low quiescent current consumption. The 8-pin configuration offers dedicated compensation and force-sense pins for complex feedback loops. Consider the 100mA sink capability against load requirements and verify thermal dissipation limits within the specified junction temperature constraints.

Voltage Reference Part Context

This part belongs to the LT1431 family of programmable references. It serves as a high-performance alternative to standard Zener-based shunt regulators. The device integrates on-chip error amplifiers and bandgap references to achieve superior temperature stability compared to discrete solutions.

Voltage Reference Replacement Considerations

LT1431IN8#PBF (Industrial Temperature Range)

Voltage Reference FAQ

How is the 5V reference output achieved?

The LT1431CN8#PBF includes on-chip divider resistors that guarantee 1% accuracy when configured as a 5V shunt regulator without additional external trim components.

What is the function of the COMP pin?

The COMP pin acts as the base for the driver transistor, allowing for additional frequency compensation in complex feedback systems or enabling shutdown functionality when utilized.