2. XC6210D202PR-G Substitution Conclusion The XC6210D202PR-G can functionally replace the original part in terms of basic regulation parameters, but it involves one critical and potentially incompatible technical difference. The D-version shares similar specs with the B-version, including a quiescent current (Iq) of 55 µA. However, according to Torex's naming convention for this series, the suffix "D" typically indicates that the Enable (EN) control logic is active-low, whereas the original A- and B-versions are active-high. If the original design uses a high-level signal to turn the regulator on, a direct substitution with the D-version would invert the control logic. This could prevent the regulator from powering up correctly or from being shut down, potentially causing system failure. Therefore, the feasibility of substitution depends entirely on whether the enable pin control logic in the existing circuit is compatible or can be adjusted.