
A strong pin-compatible alternative with improved PSRR and lower quiescent current.
Find and compare verified alternatives for the BL9165-180BARN, a 1.8V, 500mA LDO regulator in a SOT23-5 package. Review pin-compatible options and functional alternatives with detailed engineering analysis.
SOT23-5 is a standard package, but check specific dimensions if board space is tight.
Candidates may have different minimum input voltages, PSRR, or quiescent currents. Review is critical.
Alternatives are from various vendors, potentially improving supply chain resilience.
Direct replacement for BL9165-180BARN should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Start with Datasheet verified or Strong match candidates for BL9165-180BARN, then review parametric alternatives for package and electrical fit.
The main risk when substituting is ensuring the candidate's input voltage range matches the system's power supply, especially the minimum voltage.

A strong pin-compatible alternative with improved PSRR and lower quiescent current.
| Feature / factor | BL9165-180BARN | ETA5055V180DS2F | RT9013-18GB-MS | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT23-5 | SOT23-5 | SOT-23-5 | SOT23-5 / SOT-23-5 — Package matches.; RT9013-18GB-MS: Package matches. | |
| Voltage | 1.8V - 5.5V | 1.8V - 5.5V | 2.2V - 5.5V | 1.8V - 5.5V / 2.2V - 5.5V — Input voltage range matches.; RT9013-18GB-MS: Higher minimum input voltage. | |
| Current | 500mA | 500mA | 500mA | 500mA — Output current matches.; RT9013-18GB-MS: Output current matches. | |
| Psrr | 83dB @ 1kHz | 102dB | 75dB @ 1kHz | 102dB / 75dB @ 1kHz — PSRR is significantly better.; RT9013-18GB-MS: PSRR is lower than target. | |
| Quiescent Current | 45µA | 4.5µA | 60µA | 4.5µA / 60µA — Quiescent current is much lower.; RT9013-18GB-MS: Quiescent current is higher. |
Verified drop-in options for BL9165-180BARN are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.