TLV431BQDBVTG4

Overview

The TLV431BQDBVTG4 is a low-voltage adjustable precision shunt regulator from the Texas Instruments TLV431B series. It features an initial accuracy of 0.5% and operates within a reference voltage range of 1.24 V to 6 V. The device supports a maximum shunt current of 15 mA and has a maximum input voltage of 7 V. It functions across a temperature range of -40 °C to +125 °C with a typical temperature coefficient of 138 ppm/°C. The component is housed in a surface-mount SOT-23-5 package.

Feature Summary

• Provides high-precision voltage regulation with 0.5% initial accuracy for stable reference applications.
• Offers wide adjustability allowing output voltage setting between 1.24 V and 6 V using external resistors.
• Designed for automotive environments with extended operating temperature range up to +125 °C.

Applications

• Automotive power supply monitoring circuits
• Precision voltage references in battery management systems
• Feedback elements in isolated DC-DC converters

Procurement Notes

Verify the suffix 'TG4' indicates RoHS compliance and lead-free construction as per manufacturer standards. Confirm the specific package variant matches the required PCB footprint, as the standard TLV431BQDBVT exists without the G4 suffix. Ensure the application design accounts for the 15 mA maximum shunt current limit to prevent thermal issues or regulation failure under load conditions.

Selection Notes

Select this part when a compact, low-voltage solution with tight tolerance is required for automotive-grade designs. Compare against the standard TLV431BQDBVT if automotive qualification is not mandatory, noting that the Q-series ensures robustness for harsh environments. Consider the SOT-23-5 package constraints regarding thermal dissipation and board space availability during layout planning.

Part Context

This component belongs to the TLV431B family, which represents an evolution of the classic TL431 shunt regulator optimized for lower voltage operation. Unlike the standard TL431 which supports up to 36 V, the TLV431B is restricted to a 6 V maximum output, making it suitable for modern low-voltage digital and analog circuits. The 'Q' designation signifies automotive qualification, ensuring reliability under stringent industry standards.

Replacement Considerations

The TLV431BQDBVT serves as the non-RoHS equivalent. For higher voltage requirements, the TL431BQDBZRQ1G4 offers similar accuracy but supports up to 36 V. Direct pin-to-pin replacement requires verifying the system's maximum voltage does not exceed the 6 V limit of the TLV431B series.