Original Part
Linear Voltage Regulator IC Positive Fixed 1 Output 200mA USP-4D
Alternative Part
Linear Voltage Regulator IC Positive Fixed 1 Output 200mA 4-USP (1.2x1.6)
1. XC6221A092GR-G Substitution Conclusion
From the perspective of key electrical parameters, package, and basic functionality, the XC6221A092GR-G can serve as a drop-in replacement for the original XC6217B092GR-G. Both are 6V-input, fixed 0.9V/200mA output LDOs featuring an enable (EN) pin and overcurrent protection, housed in the same UDFN-4 package. Their dropout voltage and PSRR performance are also equivalent. The most critical difference lies in the quiescent current (Iq): the original part is rated at 8µA, whereas the XC6221A specifies 50µA—approximately six times higher. In battery-powered or other extremely power-sensitive applications, this substitution will lead to a significant increase in system standby or light-load power consumption, thereby reducing battery life. Furthermore, although both belong to the XC6221 series, its internal compensation network may differ from that of the XC6217 series. This could impact output capacitor selection and transient response performance; stability must be verified during replacement.
2. XC6221B092GR-G Substitution Conclusion
The XC6221B092GR-G is identical to the aforementioned XC6221A092GR-G in all provided parameters and likewise offers pin-to-pin and basic functional compatibility with the original XC6217B092GR-G. The substitution conclusion is the same as for the A version: it is a physically compatible replacement with matching voltage specifications, but carries the core drawback of increased quiescent current from 8µA to 50µA, degrading performance in low-power applications. Special attention is required: although the parameter tables for the A and B versions show no differences, manufacturers typically use such suffixes to denote internal revisions or specific test specifications. Therefore, in practical replacement scenarios, the XC6221B should be considered as having the same substitution risks as the XC6221A concerning power consumption. Both variants necessitate a focused evaluation of their power impact, along with power-on and load transient testing.
Analysis ID: 2AD5-68A5000
Based on part parameters and for reference only. Not to be used for procurement or production.
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