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
Based on pinout, output voltage/current, and core functionality (enable control, protection features), the LP3962EMP-2.5/NOPB can serve as a direct replacement for the original LP3855EMP-2.5/NOPB. However, the following key performance differences must be noted: The quiescent current (Iq) is significantly higher (9 mA vs. 3 mA), which will degrade light-load efficiency and is particularly undesirable for battery-powered applications. The dropout voltage is slightly larger (0.55V vs. 0.44V @1.5A), requiring a higher input voltage to prevent dropout. The PSRR specification is not explicitly provided; if the original design relies on high power supply rejection (e.g., in noise-sensitive circuits), bench verification is necessary. In summary, substitution is viable if the application is not sensitive to power consumption or dropout voltage and has relaxed noise requirements.
2. Substitution Conclusion for LP3965EMP-2.5/NOPB
The feasibility of substituting with the LP3965EMP-2.5/NOPB is highly similar to that of the LP3962, as both parts share nearly identical parameters (both exhibit higher Iq, larger dropout, and unspecified PSRR compared to the original part). The primary differences again are the substantially increased quiescent current (9 mA vs. 3 mA) and slightly higher dropout voltage (0.55V vs. 0.44V). This translates to higher standby power dissipation and stricter input voltage headroom requirements. If the original system relies on the LP3855's low-power or low-dropout characteristics, substitution may lead to performance degradation. Replacement is compatible if only basic voltage regulation is needed and sufficient input voltage margin is available.
Analysis ID: 7D1C-8AAD000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com