KA431SLMF2TF

Overview

The KA431SLMF2TF is a programmable shunt voltage regulator manufactured by onsemi. It functions as a precision reference and error amplifier, offering adjustable output voltages from 2.5V to 36V. The device features low dynamic impedance and high thermal stability, making it suitable for feedback control in switching power supplies and linear regulators. It operates with a cathode current range of 1mA to 100mA and includes an internal 1.25V reference. The component is designed for surface-mount applications, providing reliable performance in compact electronic designs requiring accurate voltage regulation.

Feature Summary

• Programmable output voltage capability via external resistor divider
• Low dynamic output impedance for stable regulation
• High thermal stability across operating temperature ranges
• Internal 1.25V bandgap reference for precision

Applications

• Switching power supply feedback loops
• Linear regulator error amplifiers
• Precision voltage references
• Battery chargers and power management circuits

Procurement Notes

Verify the specific suffix 'SLMF2TF' against the official onsemi datasheet to confirm package type, tape-and-reel specifications, and compliance status. Ensure the ordering part number matches the required lead frame finish and marking code. Cross-reference with the manufacturer's latest documentation to avoid discrepancies in pinout or electrical characteristics due to product revisions.

Selection Notes

Select this component when a precise, adjustable shunt regulator is needed for feedback control. Consider the operating current range and thermal requirements of the application. Verify that the external resistor network can provide the desired output voltage within the specified tolerance. Ensure the PCB layout supports the surface-mount package for optimal thermal dissipation and signal integrity.

Part Context

The KA431 series is a widely used family of programmable shunt regulators known for their accuracy and versatility. The KA431SLMF2TF variant specifically denotes a particular package and packaging configuration within this family. These devices are commonly employed in industrial, consumer, and automotive electronics where stable voltage regulation is critical. The series benefits from mature manufacturing processes and extensive design support resources.

Replacement Considerations

Compatible substitutes include the TL431 and REF431 families, provided pinouts and electrical specifications match. Verify that alternative parts meet the same voltage range, current capabilities, and package dimensions. Check for any differences in dynamic impedance or reference voltage accuracy that might impact circuit performance.