LT1431IN8#PBF

Voltage Reference Overview

The LT1431IN8#PBF is an adjustable shunt voltage regulator manufactured by Analog Devices Inc. in an 8-lead plastic DIP package. It features a guaranteed initial reference voltage tolerance of 0.4% and a typical temperature stability of 0.3%. The device provides a sink current capability ranging from 1mA to 100mA with a low reference pin input current. On-chip divider resistors allow configuration as a 5V shunt regulator without external components, while adding two external resistors enables output voltage setting between 2.5V and 36V.

Voltage Reference Feature Summary

• Adjustable shunt voltage regulator with on-chip divider resistors for simplified 5V operation
• Guaranteed 0.4% initial voltage tolerance and fast turn-on characteristics
• Sink current capability ranging from 1mA to 100mA with low reference pin current

Voltage Reference Applications

• Linear regulators
• Adjustable power supplies
• Switching power supplies

Voltage Reference Procurement Notes

Verify the specific ordering suffix IN8 corresponds to the 8-lead plastic DIP package and the -40°C to 85°C operating temperature range. Confirm RoHS compliance status via official documentation. Ensure the component matches the manufacturer's specifications for the LT1431 series before integration into designs requiring precise voltage referencing.

Voltage Reference Selection Notes

Select this component when an adjustable shunt regulator with high initial accuracy is required. The 8-pin DIP package suits through-hole applications. Consider the internal 5V configuration option if no external trimming is desired. Verify that the operating temperature range meets system requirements, as other variants offer wider thermal ranges.

Voltage Reference Part Context

The LT1431 is part of Analog Devices' programmable reference family, offering an alternative to standard TL431-compatible devices with improved initial tolerance. The IN8 variant specifically denotes the industrial temperature grade within the 8-lead plastic DIP form factor, providing a robust solution for general-purpose voltage regulation tasks.

Voltage Reference Replacement Considerations

LT1431CN8#PBF

Voltage Reference FAQ

How is the output voltage configured for 5V operation?

The LT1431 can be configured as a 5V shunt regulator using its on-chip divider resistors, which guarantees 1% initial voltage tolerance without requiring additional external components.

What is the function of the COMP pin?

The COMP pin serves as the base of the driver for the output transistor, allowing for additional compensation in complex feedback systems or regulator shutdown. It must be left open if unused.