AMS1117-5.0
Advanced Monolithic Systems
Needs validationlow risk
A strong alternative in the same package with matching key specs; pinout verification is recommended.
Best Alternatives to CJT1117B-5.0
The CJT1117B-5.0 is a standard 1A, 5V low-dropout (LDO) regulator in a SOT-223 package. Several likely pin-compatible replacements from the common 1117 family are available, such as the AMS1117-5.0. Functional alternatives with different packages also exist for applications no...
AI replacement insight
Electrical risklow
Key parameters like Vout and Iout match across many alternatives. Dropout voltage may vary slightly.
Package risklow
Multiple alternatives exist in the same SOT-223 package. Alternatives in other packages are clearly marked.
Sourcing risklow
The 1117-series is a commodity part available from numerous manufacturers, reducing sourcing risk.
Can it be replaced directly?
Direct replacement for CJT1117B-5.0 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Start with Datasheet verified or Strong match candidates for CJT1117B-5.0, then review parametric alternatives for package and electrical fit.
Main risk
The main risk when substituting is ensuring the pinout is identical and that the thermal performance and dropout voltage are acceptable for the specific application. For functional alternates, the primary issue is the package mismatch, which requires a PCB redesign.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | CJT1117B-5.0 | AMS1117-5.0 | LD1117-5.0 | L7805ABD2T-TR | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-223 | SOT-223 | - | - | D2PAK — Different SMT package requires new footprint. |
| Voltage | 5.0V | 18V | - | - | 5.0V — Output voltage matches. |
| Current | 1.0A | 1.0A | - | - | 1.0A — Output current matches. |
| Dropout Voltage | 1.15V typ | 1.4V max | - | - | 1.2V @ 1A — Very similar dropout voltage. |
Application & sourcing insights
Questions & answers
Verified drop-in options for CJT1117B-5.0 are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.