SC431ILPRAG

Overview

The SC431ILPRAG is a programmable precision shunt reference voltage regulator manufactured by onsemi. It operates within a cathode-to-anode voltage range of Vref to 36 V and supports a continuous sink current from 1.0 mA to 100 mA. The device features an adjustable output voltage, an initial accuracy tolerance of ±2.2%, and a typical temperature coefficient of 50 ppm/°C. It is housed in a TO-92-3 through-hole package and is qualified under the AEC-Q100 standard for automotive applications.

Feature Summary

• AEC-Q100 qualified for automotive reliability requirements
• Programmable output voltage adjustable via external resistors
• Temperature compensated operation across full rated ambient range
• Low dynamic output impedance for stable regulation

Applications

• Feedback control loops in switching power supplies
• Voltage monitoring circuits with defined thresholds
• Constant current sources and sinks
• Series pass regulators

Procurement Notes

Verify component authenticity against official onsemi documentation prior to integration. Confirm that the specific ordering suffix matches the required package style and shipping format. Ensure design compliance with the AEC-Q100 qualification standards if deployed in automotive environments. Review the latest Product Change Notification (PCN) for any manufacturing site or material updates.

Selection Notes

Select this component when a robust, automotive-grade shunt regulator is required in a through-hole package. The ±2.2% tolerance suits applications where high precision is not critical but cost-effectiveness and reliability are priorities. Verify that the circuit load capacitance and operating current remain within the stability boundaries defined in the datasheet to prevent oscillation.

Part Context

This part belongs to the TL431 family of programmable shunt regulators. The 'SC' prefix indicates it meets specific site and control change requirements for automotive applications. It serves as a direct replacement for standard zener diodes in many linear and switching regulator topologies, offering superior temperature stability and lower dynamic impedance compared to discrete alternatives.

Replacement Considerations

Compatible substitutes include NCV431ILPRAG and TL431ILPRAG. These parts share identical pinouts and electrical characteristics but may differ in specific automotive qualification levels or manufacturing origin. Verify package dimensions and marking codes before substitution.