TL431BVLPG

Overview

The TL431BVLPG is a three-terminal programmable shunt regulator diode from onsemi, belonging to the TL431B series. It operates as a low temperature coefficient Zener reference programmable from Vref to 36 V using two external resistors. The device features a typical voltage reference tolerance of ±0.4% at 25 °C and supports a sink current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. It is housed in a TO-92 (TO-226) package with an LP suffix and is rated for an operating ambient temperature range of −40 °C to +125 °C.

Feature Summary

• Programmable output voltage capability up to 36 V via external resistor divider
• High precision voltage reference with ±0.4% tolerance at 25 °C
• Extended industrial and automotive temperature rating from -40 °C to +125 °C
• Low dynamic output impedance and low output noise voltage characteristics

Applications

• Feedback control for driving optocouplers in power supplies
• Digital voltmeters requiring stable reference voltages
• Op amp circuitry serving as positive or negative voltage references
• Constant current sources and sinks
• Voltage monitoring circuits

Procurement Notes

Verify the specific ordering suffix 'LP' confirms the TO-92 package style and lead configuration. Confirm the 'BV' designation aligns with the required -40 °C to +125 °C operating temperature range. Ensure the 'B' grade matches the necessary ±0.4% initial accuracy specification for the design. Check RoHS compliance status if halogen-free requirements are mandatory for the application.

Selection Notes

Select this component when a precision adjustable shunt regulator is needed within the -40 °C to +125 °C range. The TL431B variant provides tighter tolerance than standard C-grade devices. Consider the TO-92 package constraints regarding thermal dissipation and board space. Verify that the required cathode current stays within the 1.0 mA to 100 mA operational window for optimal stability and regulation performance.

Part Context

This part belongs to the broader TL431 family of programmable precision references manufactured by onsemi. The family includes variants with different tolerances (A, B, C grades), temperature ranges (I, C, BV), and packages (SOIC-8, PDIP-8, Micro8). The TL431BVLPG specifically combines the high-precision B-grade reference with the extended temperature BV range in a through-hole TO-92 form factor.

Replacement Considerations

TL431BVDR2G

FAQ

What is the pinout configuration for the TL431BVLPG?

Pin 1 is the Reference input, Pin 2 is the Anode, and Pin 3 is the Cathode.

How does the TL431BVLPG differ from the TL431CDR2G?

The TL431BVLPG offers higher precision (±0.4% vs ±2.2%) and a wider operating temperature range (-40 °C to +125 °C vs 0 °C to +70 °C).