Is there a pin-compatible replacement for MIC5504-1.8YM5-TR?

XC6219B182MR shares the SOT23-5 package, but its pinout must be verified against the MIC5504-1.8YM5-TR datasheet before assuming it is pin-compatible. Electrical parameters like temperature range also differ significantly.

What risks should I check before replacing MIC5504-1.8YM5-TR?

Key risks include: 1) Electrical differences, especially output voltage, dropout voltage, and quiescent current. 2) Package and pinout mismatches requiring PCB changes. 3) Reduced operating temperature range, which could cause failures in harsh environments.

MIC5504-1.8YM5-TR Alternatives, Datasheet & Cross Reference | Microchip Technology / Micrel

Finding a replacement for the MIC5504-1.8YM5-TR LDO involves matching its 1.8V fixed output, 300mA current, and SOT23-5 package. Alternatives may require design changes or have different performance characteristics.

AI replacement insight

Electrical riskhigh

Candidates have different topology, Vout, temperature range, or dropout voltage.

Package risklow

Most candidates use the same SOT23-5 package, but pinout must be verified.

Sourcing riskmedium

Alternatives are from different manufacturers, which may have different supply chain characteristics.

Can it be replaced directly?

No direct, drop-in replacement was found. All candidates have significant differences requiring engineering review.

Best replacement path

A parametric alternative (XC6219B182MR) if temperature and dropout are acceptable; otherwise, a functional alternative (MIC5219YM5-TR) requiring redesign.

Main risk

The primary risks are either a change in function (adjustable vs. fixed) or significant downgrades in operating temperature and dropout voltage.

Recommended alternatives

A functional alternative with higher current capability, but requires redesign as it is an adjustable output LDO.

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Alternative comparison matrix

Feature / factor	MIC5504-1.8YM5-TR	MIC5219YM5-TR	XC6219B182MR	Compatibility / risk
Topology	Fixed	Adjustable	-	Adjustable — Requires external resistors to set output voltage.
Package	SOT23-5	SOT-23-5	SOT23-5	SOT-23-5 / SOT23-5 — Package and pin count match.; XC6219B182MR: Package matches, but pinout needs verification.
Output Current	0.3A	0.5A	-	0.5A — Higher current capability.
Input Voltage	2.5V to 5.5V	2.5V to 12V	-	2.5V to 12V — Wider input voltage range.
Output Voltage	1.8V	-	1.8V	1.8V — Fixed output voltage matches.
Temperature	-40°C to +125°C	-	-20°C to +60°C	-20°C to +60°C — Significantly narrower operating range.
Dropout Voltage	160mV @ 300mA	-	300mV	300mV — Higher dropout may affect low Vin operation.

Application & sourcing insights

Questions & answers

While no perfect drop-in is identified, XC6219B182MR offers the same 1.8V/300mA output but requires careful review of its narrower temperature range and higher dropout voltage. For redesigns, the adjustable MIC5219YM5-TR is a functional option.