Needs validationlow risk
A strong candidate with superior PSRR, ideal for noise-sensitive designs; verify pinout and dropout.
Best Alternatives to TP5108E23E-33
Finding a substitute for the TP5108E23E-33, a 3.3V 500mA LDO in a SOT23-5 package, involves comparing several functional alternatives. While many parts match the core specs, careful review of pinout, dropout voltage, and PSRR is required.
AI replacement insight
Package riskhigh
While the package matches, pinout is unconfirmed for all candidates and is a common point of failure for LDOs.
Electrical riskmedium
Key parameters like dropout voltage and PSRR differ, which can affect system performance, especially in low-headroom or noise-sensitive applications.
Sourcing risklow
Multiple vendors offer parts with similar core specifications, providing sourcing flexibility.
Can it be replaced directly?
No direct, verified pin-to-pin replacement has been identified. Several functional alternatives in the same SOT23-5 package exist, but require engineering review.
Best replacement path
Check datasheets for TPCAT6219-330TDGT3 (strong overall) and ETA5055V330DS2F (superior PSRR) to verify pinout and missing parameters.
Main risk
The primary risk is pinout incompatibility, which would require a PCB redesign. Secondary risks include performance degradation from higher dropout voltage or lower PSRR.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | TP5108E23E-33 | ETA5055V330DS2F | TPCAT6219-330TDGT3 | TPMIC5219-3.3YM5 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT23-5 | SOT23-5 | SOT23-5 | SOT-23-5 | SOT23-5 / SOT-23-5 — Package matches target.; TPCAT6219-330TDGT3: Package matches target.; TPMIC5219-3.3YM5: Package matches target.; TPAP2112K-3.3TRG1: Package matches target. |
| Psrr | 72dB @ 1kHz | 102dB | Unknown | - | 102dB / Unknown — Significantly higher PSRR is a major improvement for noise-sensitive applications.; TPCAT6219-330TDGT3: PSRR value is missing and must be checked for noise-sensitive circuits.; TPAP2112K-3.3TRG1: PSRR value is missing and must be checked. |
| Quiescent Current | 80µA | 4.5µA | 10µA | 1.5µA | 4.5µA / 10µA / 1.5µA — Significantly lower quiescent current.; TPCAT6219-330TDGT3: Significantly lower quiescent current.; TPMIC5219-3.3YM5: Lower quiescent current is an improvement. |
| Dropout Voltage | 100mV @ 100mA | Unknown | 85mV @ 100mA | 0.42V @ 100mA | Unknown / 85mV @ 100mA / 0.42V @ 100mA / 0.32V @ 600mA — Dropout voltage is missing and must be checked.; TPCAT6219-330TDGT3: Lower dropout voltage is a significant improvement.; TPMIC5219-3.3YM5: Significantly higher dropout may not work in low headroom applications.; TPAP2112K-3.3TRG1: Dropout voltage is likely higher than target's. |
| Pinout | SOT23-5 Standard | Unknown | Unknown | Unknown | Unknown — Pinout must be verified from datasheet.; TPCAT6219-330TDGT3: Pinout must be verified from datasheet.; TPMIC5219-3.3YM5: Pinout must be verified from datasheet to ensure compatibility.; TPAP2112K-3.3TRG1: Pinout must be verified from datasheet. |
| Voltage | 3.3V | - | - | 3.3V | 3.3V — Output voltage matches. |
| Current | 500mA | - | - | 500mA | 500mA / 600mA — Output current matches.; TPAP2112K-3.3TRG1: Higher output current provides more design margin. |
Application & sourcing insights
Questions & answers
The best alternatives appear to be TPCAT6219-330TDGT3 for its improved dropout voltage and ETA5055V330DS2F for its superior PSRR. However, you must verify the pinout and other missing parameters from their datasheets before selection.