TLVH431BIDBZTG4

Overview

The TLVH431BIDBZTG4 is a precision adjustable shunt regulator from Texas Instruments, designed for low-voltage applications. It operates within a supply voltage range of 2.5 V to 5.5 V and features a reference voltage tolerance of ±0.6% at room temperature. The device integrates an NPN output transistor with a cathode current capability up to 100 mA. Key electrical characteristics include a low dynamic impedance of typically 0.15 ohms and a high open-loop gain exceeding 80 dB. It is housed in a compact SOT-23 package, suitable for space-constrained designs requiring stable voltage referencing.

Feature Summary

• Precision adjustable reference voltage with tight initial accuracy tolerance
• Low dynamic output impedance ensuring stable regulation under varying load conditions
• Integrated NPN output stage capable of sourcing significant cathode current
• Operates efficiently within low-voltage supply ranges down to 2.5 volts

Applications

• Portable battery-powered equipment requiring precise voltage monitoring
• DC-to-DC converter feedback loops for output voltage regulation
• Power supply remote sensing circuits
• Voltage reference sources for analog-to-digital converters

Procurement Notes

Verify the complete part number including suffixes such as 'G4' which indicates lead-free status and RoHS compliance. Confirm the package type matches the design footprint requirements. Ensure the operating temperature range aligns with the specific environmental conditions of the target application. Cross-reference the datasheet revision date to ensure access to the most current electrical specifications and mechanical drawings before finalizing procurement.

Selection Notes

Select this component when a low-voltage, high-precision shunt regulator is required. Consider the ±0.6% tolerance if strict reference accuracy is critical for the system. Evaluate the thermal performance within the SOT-23 package for the expected power dissipation. Compare against standard TLV431 variants if higher current drive or different temperature stability is needed. Ensure the input voltage remains within the specified 2.5 V to 5.5 V operational window.

Part Context

This device belongs to the TLVH431 family of programmable shunt regulators. It shares functional similarities with other adjustable references but offers optimized performance for low-voltage systems. The family provides various package options and tolerance grades. This specific variant focuses on precision and low-power operation, distinguishing it from general-purpose regulators in the broader Texas Instruments portfolio.

Replacement Considerations

Direct substitutes include the TLV431AIDBZR and TLVH431AIDBZT for similar functionality with potentially different tolerance grades. Verify pin compatibility and thermal characteristics when swapping between these models. Ensure that any replacement maintains the required voltage range and current capabilities for the existing circuit design.