
MSKSEMI
Pin-compatible upgrade with higher current and wider input voltage range, but has a higher dropout voltage.
Finding a replacement for the ME6119C50M5G 5V LDO involves checking key parameters like input voltage, output current, and operating temperature. Several pin-compatible alternatives exist but require careful review of datasheet specifications.
Several candidates have lower max input voltage or higher dropout voltage, requiring careful circuit analysis.
All viable candidates use the same SOT-23-5 package and share a common pinout, simplifying physical replacement.
As a simple LDO, there is no firmware interaction, so this risk is not applicable.
Direct replacement for ME6119C50M5G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
AP2204K-5.0TRG1(MS) offers the best overall parametric match and upgrade path, provided its higher dropout voltage is acceptable.
The primary risks when substituting are mismatches in maximum input voltage and operating temperature range, which can lead to device failure.

MSKSEMI
Pin-compatible upgrade with higher current and wider input voltage range, but has a higher dropout voltage.
| Feature / factor | ME6119C50M5G | AP2204K-5.0TRG1(MS) | ME6231C50M5G | SSP7603P50M5R | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT23-5 | SOT-23-5 / SOT23-5 — Pinout confirmed identical from datasheet.; ME6231C50M5G: Pinout confirmed identical from datasheet.; SSP7603P50M5R: Pinout confirmed identical from datasheet. |
| Voltage | 2.5V - 18V | 2V - 24V | 3V - 18V | up to 15V | 2V - 24V / 3V - 18V / up to 15V — Wider input voltage range on both ends.; ME6231C50M5G: Minimum input voltage is higher.; SSP7603P50M5R: Lower maximum input voltage. |
| Current | 400 mA | 500 mA | 500 mA | 500 mA | 500 mA — Provides higher output current capability.; ME6231C50M5G: Provides higher output current capability.; SSP7603P50M5R: Higher output current capability. |
| Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C | -40°C to +85°C | -40°C to +125°C / -40°C to +85°C — Operating temperature range matches.; ME6231C50M5G: Reduced maximum operating temperature.; SSP7603P50M5R: Reduced maximum operating temperature. |
| Dropout Voltage | 104 mV @ 100mA | 350 mV @ 100mA | - | - | 350 mV @ 100mA — Significantly higher dropout voltage. |
| Quiescent Current | 60 µA | - | 1.8 µA | - | 1.8 µA — Significantly lower quiescent current. |
Verified drop-in options for ME6119C50M5G 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.