78D05
BLUE ROCKET
Needs validationlow risk
Strong electrical match with higher current in a smaller TO-252 package. Footprint check is required.
Best Alternatives to LM7805
Find and compare alternatives for the LM7805, a popular 5V, 1A linear voltage regulator in a TO-263 package. This guide analyzes functional and parametric replacements, highlighting key differences in package, voltage, and performance to help you make an informed choice.
AI replacement insight
Package riskhigh
Most alternatives are in different packages (TO-252, SOT-223, TO-220) requiring layout changes and thermal analysis.
Electrical riskhigh
Several candidates have a significantly lower max input voltage (15V-18V) than the target's 35V.
Sourcing risklow
The 7805 family and its derivatives are widely available from multiple manufacturers, offering good sourcing flexibility.
Can it be replaced directly?
No direct, drop-in pin-to-pin replacement in the same TO-263 package was identified. Alternatives require careful review of package, footprint, and key electrical ratings like maximum input voltage.
Best replacement path
The 78D05 and CJ78D05 are the strongest candidates, offering matching or better electrical specs in a smaller, often compatible TO-252 package. However, this requires PCB layout and thermal verification.
Main risk
The primary risks are package mismatch and lower maximum input voltage on several candidates. Using a part with a lower voltage rating (e.g., 15V or 18V) in a 35V system will cause immediate failure.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | LM7805 | 78D05 | CJ78D05 | L7805CV-HXY | Compatibility / risk |
|---|---|---|---|---|---|
| Package | TO-263 | TO-252 | TO-252-2L | TO-220S | TO-252 / TO-252-2L / TO-220S / SOT-223, TO-252-2L, SOT-89 — Smaller DPAK package, may be footprint compatible but requires verification.; CJ78D05: Smaller DPAK package, may be footprint compatible but requires verification.; L7805CV-HXY: Through-hole package vs. surface-mount.; AMS1117-5.0(XBLW): Offered in multiple packages, none match TO-263. |
| Voltage | 35V | 35V | 35V | 35V | 35V / 15V — Maximum input voltage matches.; CJ78D05: Maximum input voltage matches.; L7805CV-HXY: Maximum input voltage matches.; AMS1117-5.0(XBLW): Maximum input voltage is significantly lower. |
| Current | 1.0A | 1.5A | 1.0A | 1.0A | 1.5A / 1.0A — Higher output current capability.; CJ78D05: Output current matches.; L7805CV-HXY: Output current matches.; AMS1117-5.0(XBLW): Output current matches. |
| Temperature | 0°C to 125°C | 0°C to 125°C | -25°C to 125°C | -25°C to 125°C | 0°C to 125°C / -25°C to 125°C — Operating temperature range matches.; CJ78D05: Wider operating temperature range.; L7805CV-HXY: Wider operating temperature range. |
Application & sourcing insights
Questions & answers
The best alternative depends on your specific needs. The CJ78D05 and 78D05 offer similar electrical performance in a smaller TO-252 package, but require footprint verification. For applications with lower input voltage, the LDL1117S50R is a modern LDO with better efficiency.