Is there a pin-compatible replacement for PJ75AL33SA?

Several candidates like TLV76033DBZR share the SOT-23 package, but pin-to-pin compatibility is not guaranteed without datasheet verification. Key electrical parameters, especially the maximum input voltage, differ and must be checked.

What risks should I check before replacing PJ75AL33SA?

The primary risk is the lower maximum input voltage of all identified alternatives (8V-30V vs. the original's 36V). Using a substitute in a circuit with voltage exceeding its rating can cause permanent damage. Also, check pinout, quiescent current, and stability requirements.

PJ75AL33SA Alternatives, Datasheet & Cross Reference | PJSEMI

PJ75AL33SA is a 3.3V, 100mA LDO in a SOT-23 package with a high 36V input rating. While no direct drop-in replacements with the same input voltage were found, several functional alternatives exist with lower voltage ratings that may be suitable for specific applications after careful review.

AI replacement insight

Electrical riskhigh

All candidates have a lower max input voltage (8V-30V) than the target's 36V.

Package riskmedium

Pinout compatibility for SOT-23 packages is not guaranteed and must be verified from datasheets.

Can it be replaced directly?

No direct, drop-in replacement for PJ75AL33SA has been identified. All candidates have a lower maximum input voltage, which requires careful design review.

Best replacement path

For applications operating below 30V, TLV76033DBZR is the closest parametric match. For all others, a new part search focusing on a >=36V input rating is required.

Main risk

All potential substitutes have a lower maximum input voltage rating (Vin_max) than the original s 36V, creating a significant electrical risk if the application voltage is high.

Recommended alternatives

Similar LDO in SOT-23 package but with a lower 30V maximum input voltage rating.

View details

Alternative comparison matrix

Feature / factor	PJ75AL33SA	TLV76033DBZR	ME6118A33M3G	Compatibility / risk
Package	SOT-23	SOT-23	SOT23-3	SOT-23 / SOT23-3 — Package matches, but pinout requires verification.; ME6118A33M3G: Package name differs slightly (SOT23-3 vs SOT-23), requires verification.
Voltage	36 V	30 V	18 V	30 V / 18 V — Candidate has lower max input voltage.; ME6118A33M3G: Significantly lower max input voltage.
Current	100 mA	100 mA	500 mA	100 mA / 500 mA — Output current matches.; ME6118A33M3G: Higher output current capability.

Application & sourcing insights

Questions & answers

The best alternative depends on your application's input voltage. TLV76033DBZR offers the highest input voltage among candidates (30V) and matches other key specs, but this is still lower than the original's 36V. Always verify against your circuit's maximum voltage.