Is there a pin-compatible replacement for L78L10ACUTR?

No confirmed pin-to-pin replacement is listed. While candidates like L78L09ABUTR share the same package and are likely pin-compatible, their output voltage differs, preventing a direct drop-in.

What risks should I check before replacing L78L10ACUTR?

The main risk is the lower output voltage (9V vs 10V) of available alternatives. You must verify that all downstream circuits will function correctly with a 10% lower supply voltage. Also check for any differences in temperature range.

L78L10ACUTR Alternatives, Datasheet & Cross Reference | STMicroelectronics

L78L10ACUTR is a 10V, 100mA fixed linear voltage regulator from STMicroelectronics in a SOT-89 package. This page explores potential alternatives and their compatibility.

AI replacement insight

Electrical riskhigh

Output voltage mismatch is a critical parameter change.

Package risklow

SOT-89 package is a standard match.

Can it be replaced directly?

There are no direct, pin-compatible 10V replacements in this list. Alternatives have different output voltages.

Best replacement path

No direct drop-in replacement was found. The closest options are 9V regulators like L78L09ABUTR, which require careful review of the application's voltage tolerance.

Main risk

The primary risk is the output voltage mismatch. Using a 9V regulator instead of a 10V one can cause system malfunction if downstream components require the higher voltage.

Recommended alternatives

A 9V regulator from the same family and package, offering identical current but requiring voltage tolerance verification.

View details

Alternative comparison matrix

Feature / factor	L78L10ACUTR	L78L09ABUTR	78L09	Compatibility / risk
Package	SOT-89	SOT-89	SOT-89	SOT-89 — Package matches.; 78L09: Package matches.
Voltage	10.0V	9.0V	9.0V	9.0V — Candidate voltage is lower.; 78L09: Candidate voltage is lower.
Current	100mA	100mA	100mA	100mA — Output current matches.; 78L09: Output current matches.
Temperature	0°C to 125°C	-40°C to 125°C	-20°C to 120°C	-40°C to 125°C / -20°C to 120°C — Wider operating range.; 78L09: Slightly narrower operating range.
Pinout	3-pin	3-pin	3-pin	3-pin — Pinout not verified, but likely compatible as it's in the same family.; 78L09: Pinout not verified, but likely compatible as it's a 78Lxx type.

Application & sourcing insights

Questions & answers

L78L09ABUTR from STMicroelectronics is a close parametric alternative, but it provides 9V instead of 10V. Its suitability depends on your circuit's tolerance to a lower supply voltage.