Is there a pin-compatible replacement for LM2576S-12?

Parts from the LM2576S-12 family, like LM2576S-12RG, are often pin-compatible. However, pinout verification against the datasheet is always required before board assembly as minor manufacturing differences can exist.

What risks should I check before replacing LM2576S-12?

Key risks include differences in switching frequency (e.g., LM2596 series), which affects external component values and EMI, and minor package variations. Always verify the pinout and mechanical dimensions from the datasheet.

LM2576S-12 Alternatives, Datasheet & Cross Reference | TWGMC

The LM2576S-12 is a popular 3A, 12V fixed output step-down (buck) voltage regulator in a TO-263-5 package. It operates with an input voltage up to 40V and a fixed 52kHz switching frequency, making it a staple in power supply designs.

AI replacement insight

Electrical riskmedium

Switching frequency differences are common and require circuit modification.

Package risklow

Most candidates use a compatible TO-263-5 package, but verification is needed.

Can it be replaced directly?

Yes, several manufacturers produce LM2576S-12 variants that are strong functional matches. The LM2576HVS-12 is a superior upgrade path for designs needing higher input voltage.

Best replacement path

The LM2576HVS-12 offers a direct upgrade path with a higher input voltage tolerance (60V vs 40V) while maintaining the same switching frequency, simplifying design adjustments.

Main risk

The primary risk is using a substitute with a different switching frequency (e.g., 150kHz vs 52kHz), which necessitates recalculating inductor and capacitor values.

Recommended alternatives

A strong upgrade with higher 60V input voltage and matching 52kHz switching frequency.

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Alternative comparison matrix

Feature / factor	LM2576S-12	LM2576HVS-12	LM2576S-12RG	LM2596R-12	Compatibility / risk
Voltage	40V	60V	40V	40V	60V / 40V — Provides wider operating margin.; LM2576S-12RG: Datasheet confirms 40V max input, matching target.; LM2596R-12: matched
Switching Frequency	52kHz	52kHz	52kHz	150kHz	52kHz / 150kHz — Matching frequency simplifies external component selection.; LM2576S-12RG: matched; LM2596R-12: Higher frequency may require smaller external L/C components.
Package	TO-263-5	TO-263-5L	TO-263-5	TO-263-5	TO-263-5L — Suffix 'L' likely indicates lead-form but requires mechanical verification.; LM2576S-12RG: matched; LM2596R-12: matched
Current	3.0A	3.0A	-	3.0A	3.0A — matched; LM2596R-12: matched
Manufacturer	TWGMC	-	HANSCHIP	-	HANSCHIP — Cross-vendor alternative from the same product family.

Application & sourcing insights

Questions & answers

The LM2576HVS-12 is an excellent upgrade, offering a higher 60V input voltage with the same 52kHz switching frequency and package. For similar performance, the LM2576S-12RG is a strong cross-vendor alternative.