1. TLV431ACDBVR Substitution Conclusion The TLV431ACDBVR is a direct drop‑in replacement in terms of package compatibility (SOT‑23‑5) and basic functionality (adjustable shunt reference, 1.24 V to 6 V output). However, several critical differences require careful evaluation: First, its output current capability is 15 mA—only half that of the original part (30 mA). If the original circuit operates near or above 15 mA, the reference may overload and fail. Second, its accuracy (±1%) is better than the original (±2%), which can improve system voltage precision, but the temperature coefficient is not specified, potentially leading to different drift behavior over temperature. Additionally, its cathode operating current (80 µA) is slightly higher than the original (60 µA), resulting in marginally increased power dissipation. Overall, this device can be substituted in applications where the output current requirement is ≤15 mA, the temperature range meets the actual use case, and automotive qualification (AEC‑Q100) is not required; otherwise, circuit reliability must be re‑verified.