LT1431IS8#TRPBF

Voltage Reference Overview

The LT1431IS8#TRPBF is an adjustable shunt voltage regulator in an 8-lead plastic SO package. It features a guaranteed 0.4% initial reference voltage tolerance and a typical temperature coefficient of 50 ppm/°C. The device supports an output voltage range from 2.5V to 36V with a maximum sink current capability of 100mA. It operates within a temperature range of -40°C to +85°C, drawing a typical quiescent current of 0.6mA.

Voltage Reference Feature Summary

• Guaranteed 0.4% initial voltage tolerance for high precision applications
• On-chip divider resistors enable self-contained 5V regulation without external components
• Fast turn-on response suitable for switching power supply feedback loops
• Low reference pin input bias current reduces loading on external resistor networks

Voltage Reference Applications

• Linear regulators
• Adjustable power supplies
• Switching power supplies

Voltage Reference Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing. Confirm the IS8 designation corresponds to the industrial temperature grade (-40°C to +85°C) and SOIC-8 package style required for your design. Ensure compatibility with your assembly process regarding lead-free finish specifications.

Voltage Reference Selection Notes

Select this component when precise shunt regulation is required with minimal external trimming. The internal 5k-5k divider simplifies 5V designs. Consider the 100mA sink limit for load requirements. For lower pin count needs, the 3-pin TO-92 Z package variant offers TL431 pin compatibility.

Voltage Reference Part Context

This part belongs to the LT1431 family of programmable references manufactured by Analog Devices. The family includes variants in J8, N8, S8, and Z packages. The IS8#TRPBF specifically denotes the industrial temperature range version in narrow SOIC-8 format supplied in reels for automated surface-mount assembly.

Voltage Reference Replacement Considerations

LT1431IS8#PBF (Tube Packaging)

Voltage Reference FAQ

How is the 5V output configured?

Connect the RTOP pin to the Collector and the RMID pin to the REF pin. This utilizes the internal 5k-5k divider to set the output to 5V with 1% accuracy without external resistors.

What is the minimum operating current?

The minimum cathode current required for regulation is typically 0.6mA, though it can go as low as 1mA depending on specific conditions.