L9473J

Special Purpose Regulators Overview

The L9473J is a monolithic multifunction generator voltage regulator IC designed for automotive charging applications. It features a high-side field driver and thermistor-compensated set-point control to ensure stable output voltage across varying ambient temperatures. The device supports both air-cooled and liquid-cooled alternator systems, utilizing a special default compensation curve via the TS terminal. Packaged in an 8-Multiwatt straight-lead case, it integrates essential regulation functions for reliable vehicle electrical system management.

Special Purpose Regulators Feature Summary

• Monolithic integration of multifunction generator voltage regulation
• High-side field driver capability for direct alternator control
• Thermistor-compensated set-point control for temperature stability
• Supports both air-cooled and liquid-cooled automotive applications

Special Purpose Regulators Applications

• Automotive alternator voltage regulation
• Air-cooled engine charging systems
• Liquid-cooled engine charging systems
• Vehicle electrical power management

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package integrity and pin alignment against the 8-Multiwatt specification. Check datasheet revisions for any updates to thermal or electrical characteristics. Ensure compatibility with existing circuit designs regarding the TS terminal configuration. Validate lifecycle status as obsolete may impact long-term supply availability.

Special Purpose Regulators Selection Notes

Select this component for automotive applications requiring integrated voltage regulation and field drive. Consider the thermistor compensation feature for environments with significant temperature fluctuations. Evaluate the 8-Multiwatt package for thermal dissipation needs in compact engine bays. Compare against newer alternatives if long-term procurement is critical due to obsolete status.

Special Purpose Regulators Part Context

The L9473J belongs to STMicroelectronics' portfolio of special purpose regulators tailored for automotive power management. It addresses the specific requirements of alternator control in passenger vehicles and light commercial applications. The design emphasizes reliability and simplicity by combining regulation and driving functions into a single monolithic chip.

Special Purpose Regulators Replacement Considerations

The L9473J is listed with an obsolete lifecycle status. Verify if STMicroelectronics offers a direct successor part number with compatible pinout and functionality. Consult official substitution guides for recommended replacements that maintain the same thermistor compensation and high-side drive specifications.