1. XC6217A092GR-G Substitution Conclusion Feasible, but low-power requirements require critical evaluation. The XC6217A092GR-G matches the original XC6221A092GR-G exactly in core performance parameters (input/output voltage, maximum output current, dropout voltage, PSRR, package) and includes both enable control and overcurrent protection. The key difference is the substantial reduction in quiescent current (Iq) from 50µA to 8µA. Under light-load or standby conditions, the new device's self-consumption is significantly lower, which helps extend battery life in portable applications. This improvement likely stems from adjustments to the internal circuit architecture, such as the error amplifier biasing scheme. It is necessary to verify in the actual application whether its dynamic response characteristics (e.g., load transient response) are comparable to the original part. If the system is sensitive to static power consumption and the dynamic performance meets requirements, it can be considered a high-performance substitute.