TLVH431BQDBZRQ1G4

Overview

The TLVH431BQDBZRQ1G4 is an automotive-grade, low-voltage adjustable precision shunt voltage reference manufactured by Texas Instruments. It operates within a supply voltage range of 1.252 V to 18 V and delivers a maximum cathode current of 70 mA. The device features a typical temperature coefficient of 161 PPM/°C and maintains an initial accuracy of ±0.5%. Designed for surface-mount applications, it is housed in a compact SOT-23-3 package. The component supports an extended operating temperature range from -40°C to +125°C and complies with AEC-Q100 qualification standards for automotive electronics.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards
• Low-voltage operation capability starting at 1.252 V
• High precision with ±0.5% initial accuracy tolerance
• Compact SOT-23-3 surface-mount packaging

Applications

• Automotive power management circuits
• Battery monitoring systems
• Precision voltage regulation in low-voltage environments

Procurement Notes

Verify the complete part number including the G4 suffix to ensure compliance with specific manufacturing or environmental requirements. Confirm that the SOT-23-3 package aligns with your PCB footprint design. Ensure the 18 V maximum output voltage meets your circuit's headroom needs. Check for AEC-Q100 certification if automotive qualification is mandatory for your application. Validate the 70 mA current limit against your load requirements.

Selection Notes

Select this component when designing for automotive applications requiring low-voltage precision references. It is suitable where space is limited due to its small SOT-23-3 form factor. Choose this over standard TL431 variants if the system operates below 18 V and requires lower minimum operating voltages. Consider the 161 PPM/°C temperature coefficient for thermal stability requirements. Ensure the 70 mA sink current is sufficient for the intended feedback network.

Part Context

This device belongs to the TLVH431 family, which is optimized for low-voltage operations compared to the traditional TL431 series. While the TL431 supports up to 36 V, the TLVH431 is restricted to 18 V but offers improved performance at lower voltages. The Q1 designation indicates automotive qualification, distinguishing it from commercial grade parts. The G4 suffix typically denotes lead-free and RoHS-compliant manufacturing processes.

Replacement Considerations

The TLVH431BQDBZRQ1 is a direct functional substitute without the G4 suffix. For higher voltage applications up to 36 V, the TL431AQDBZRQ1 may be considered, though it has different electrical characteristics.