Original Part
Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A SOT-223-5
Alternative Part
Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A SOT-223-5
Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A SOT-223-5
1. Substitution Conclusion for LP3962EMP-2.5/NOPB
From the perspective of core electrical specifications and package, the LP3962 can be considered as a pin-compatible substitute. However, its quiescent current (Iq) of 9 mA is notably higher than the original part's 5 mA. This will result in increased standby power consumption in battery-powered or other power-sensitive applications. Furthermore, its datasheet does not specify a PSRR (Power Supply Rejection Ratio) value, whereas the original part provides a well-defined and superior PSRR performance (73dB ~ 57dB @ 120Hz). This indicates that the LP3962's capability to suppress input ripple and noise may be uncertain or inferior. Therefore, direct substitution requires careful evaluation in applications with stringent requirements for power supply purity or system power consumption.
2. Substitution Conclusion for LP3965EMP-2.5/NOPB
The LP3965 matches the original part in terms of voltage, current, dropout voltage, package, and basic protection features, meeting the physical and fundamental electrical requirements for direct replacement. It shares two key differences with the LP3962: first, its quiescent current (Iq) is also 9 mA, higher than the original part, leading to greater no-load power dissipation; second, its datasheet likewise omits a specified PSRR value, making its noise rejection performance an unknown variable. It may not match the excellent noise suppression capability provided by the original LP3872 in sensitive analog circuits. For non-power-critical digital circuitry that is insensitive to supply noise, it can serve as a substitute. However, it is not an ideal choice for high-performance or low-power applications.
Analysis ID: 8D4A-741C000
Based on part parameters and for reference only. Not to be used for procurement or production.
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