Is there a pin-compatible replacement for SK6019AD4-33?

Yes, PJ54M33DE is pin-compatible in the same DFN1x1-4L package. However, it is not electrically equivalent, offering lower output current, and requires careful review of your circuit's power budget.

What risks should I check before replacing SK6019AD4-33?

Key risks are: 1) Pinout mismatch, as some alternatives like DS8561-33D4 swap pins. 2) Lower output current, which can cause voltage drops under load. 3) Different input voltage range, which may not suit your power source.

SK6019AD4-33 Alternatives, Datasheet & Cross Reference | SUNTEK MICRO LTD

SK6019AD4-33 is a 3.3V, 750mA LDO regulator in a compact DFN1x1-4L package, valued for its low noise and high PSRR. Finding a direct drop-in replacement requires careful matching of electrical parameters and pinout.

AI replacement insight

Package risklow

The DFN1x1-4L package is common, but pinouts vary.

Electrical riskhigh

Most alternatives have much lower output current ratings.

Firmware riskhigh

No firmware risk for this component type.

Can it be replaced directly?

No direct, fully equivalent replacement was found. PJ54M33DE is pin-compatible but has a lower current rating. Other candidates require board redesign.

Best replacement path

Find a pin-compatible LDO like PJ54M33DE, but only if the application's current draw is under 350mA and input voltage is above 3V.

Main risk

The main risks are pinout incompatibility and reduced output current capability in potential alternatives.

Recommended alternatives

A pin-compatible alternative in the same package, but with lower output current (350mA) that requires application review.

View details

Alternative comparison matrix

Feature / factor	SK6019AD4-33	PJ54M33DE	DS8561-33D4	Compatibility / risk
Package	DFN1x1-4L	DFN1x1-4L	DFN1x1-4L	DFN1x1-4L — Package matches target.; DS8561-33D4: Package matches target.
Pinout	Pin-compatible	Pin-compatible	VIN/VOUT swapped	Pin-compatible / VIN/VOUT swapped — Pinout matches based on datasheet review.; DS8561-33D4: Requires board redesign.
Voltage	2.5V to 6.5V	3V to 45V	1.2V to 5.5V	3V to 45V / 1.2V to 5.5V — Minimum input voltage is higher (3V vs 2.5V).; DS8561-33D4: Max input voltage is lower.
Current	750mA	350mA	300mA	350mA / 300mA — Significantly lower output current.; DS8561-33D4: Significantly lower output current.

Application & sourcing insights

Questions & answers

PJ54M33DE is a potential alternative if your design can tolerate a lower output current (350mA vs 750mA) and a higher minimum input voltage (3.0V vs 2.5V). It shares the same package and pinout.