Is there a pin-compatible replacement for ME6239A33M3G?

Several LDOs share the SOT-23-3 package and a similar pinout, such as ME6214A33M3G. However, due to significant differences in maximum input voltage, they are not direct drop-in replacements and require electrical validation.

What risks should I check before replacing ME6239A33M3G?

The primary risk is the maximum input voltage; the target supports 30V, while many alternatives support only 15-18V. Also check output current capability, quiescent current for battery life, and dropout voltage for low-input conditions.

ME6239A33M3G Alternatives, Datasheet & Cross Reference | MICRONE

ME6239A33M3G is a 3.3V, 250mA LDO in a SOT-23-3 package, notable for its high 30V input voltage and very low 1.5µA quiescent current. Finding a direct replacement requires careful matching of these key parameters.

AI replacement insight

Electrical riskhigh

Significant mismatch in maximum input voltage (30V vs. <18V) can cause device failure.

Package risklow

SOT-23-3 is a common package with a standard pinout for this function.

Sourcing riskmedium

High-voltage LDOs with very low quiescent current are specialized, potentially limiting the pool of available alternatives.

Can it be replaced directly?

No direct drop-in replacement has been identified. All reviewed candidates have a lower maximum input voltage, requiring circuit-level validation.

Best replacement path

Filter for LDOs with Vin(max) >= 30V, Vout=3.3V, Iout >= 250mA in a SOT-23-3 package. If none are available, evaluate candidates with lower Vin ratings like ME6214A33M3G, ensuring the application's voltage does not exceed their limits.

Main risk

Maximum input voltage mismatch; most alternatives cannot handle the target's 30V rating.

Recommended alternatives

Functional alternative with higher current and lower quiescent current, but a lower 18V maximum input voltage.

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Alternative comparison matrix

Feature / factor	ME6239A33M3G	ME6214A33M3G	NH6302A33M	SSP7603P33MR	Compatibility / risk
Voltage	30V	18V	18V	15V	18V / 15V — Max input voltage is significantly lower.; NH6302A33M: Max input voltage is significantly lower.; SSP7603P33MR: Max input voltage is half of the target's.
Current	250mA	300mA	300mA	500mA	300mA / 500mA — Higher output current capability.; NH6302A33M: Higher output current capability.; SSP7603P33MR: Significantly higher output current.
Quiescent Current	1.5µA	0.7µA	2µA	1.5µA	0.7µA / 2µA / 1.5µA — Lower quiescent current is beneficial for battery life.; NH6302A33M: Slightly higher quiescent current.; SSP7603P33MR: Quiescent current matches.
Package	SOT-23-3	SOT23-3	SOT-23-3	SOT23-3	SOT23-3 / SOT-23-3 — Package appears to be a match.; NH6302A33M: Package appears to be a match.; SSP7603P33MR: Package appears to be a match.

Application & sourcing insights

Questions & answers

There are several functional alternatives like MICRONE's ME6214A33M3G, but most have a lower maximum input voltage (typically 18V vs. 30V). The best choice depends on your circuit's specific input voltage and current requirements.