L7805ABV
STMicroelectronics
Needs validationhigh risk
From a major manufacturer (ST), but in a different (TO-220) through-hole package.
Best Alternatives to 78D05
Finding a substitute for the 78D05 5V linear regulator involves a trade-off. While many parts are functionally similar, candidates either have a lower input voltage rating or come in a different package, requiring careful engineering review.
AI replacement insight
Electrical riskhigh
Several candidates have a lower maximum input voltage, posing a risk of damage if the system voltage exceeds their rating.
Package riskhigh
Many functional matches are in a TO-220 package, which is not physically compatible with the target's TO-252 footprint.
Can it be replaced directly?
No direct, risk-free replacement was found. Candidates either have a lower input voltage rating or a different package requiring board redesign.
Best replacement path
If layout cannot change, review LM29150RS-5.0 but verify input voltage is below 26V. If layout can change, L7805ABV is a strong functional match.
Main risk
Mismatched electrical ratings (input voltage) or physical package (surface-mount vs. through-hole).
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | 78D05 | L7805ABV | L7805CV(XBLW) | LM7805CTG | Compatibility / risk |
|---|---|---|---|---|---|
| Package | TO-252 | TO-220 | TO-220 | TO-220-3 | TO-220 / TO-220-3 / TO-252 — Different package (Through-Hole vs Surface-Mount).; L7805CV(XBLW): Different package (Through-Hole vs Surface-Mount).; LM7805CTG: Different package (Through-Hole vs Surface-Mount).; LM29150RS-5.0: Package matches, enabling form-fit evaluation. |
| Output Voltage V | 5.0V | 5.0V | 5.0V | 5.0V | 5.0V — matched; L7805CV(XBLW): matched; LM7805CTG: matched; LM29150RS-5.0: matched |
| Input Voltage V | 35.0V | 35.0V | 40.0V | 35V | 35.0V / 40.0V / 35V / 26.0V — matched; L7805CV(XBLW): Higher max input voltage provides more margin.; LM7805CTG: matched; LM29150RS-5.0: Candidate has lower max input voltage. |
| Output Current A | 1.5A | 1.5A | 1.5A | 1.5A | 1.5A — matched; L7805CV(XBLW): matched; LM7805CTG: matched; LM29150RS-5.0: matched |
| Temperature | 0°C to 125°C | -40°C to 125°C | - | - | -40°C to 125°C — Wider operating temperature range.; LM29150RS-5.0: Wider operating temperature range. |
Application & sourcing insights
Questions & answers
No single 'best' alternative exists. If your board must use the TO-252 package, LM29150RS-5.0 is a candidate, but you must confirm your input voltage is under 26V. If you can change your PCB layout, L7805ABV is an electrically strong match.