Specs side by side
2 parts compared · 13 differing specs across 14 total parameters.
| Parameter | ||
|---|---|---|
| Supply voltage | Operation to 40V input; the core rule of the topology: the sum of input plus output voltage stays within 40V. | - |
| Memory & Peripherals | Same three topologies (buck, boost, inverting) and the same external current-boost option for beyond 1.5A peaks. | - |
| Compatibility Level | 100% Drop-in (Zero Code Change) | - |
| Component Category | - | Switching Regulator Controllers |
| Core & Architecture | The same die, same pinout and same design formulas, characterized over -40 to +85C against the commercial 0-70C of the MC34063A - and the NCV33063 automotive grade extends further for under-hood designs. | - |
| Firmware Notes | Pick by environment, not by brand: hot enclosures and outdoor gear want the 33063A/NCV grade. Functionally the parts do not differ - the boundary is temperature. | - |
| Hardware Notes | Same 8-pin body; the passives around it are the design. | - |
| Lead Time Advantage | Shenzhen Spot Stock (24-48h Dispatch) | - |
| Market Reality | - | The MC34063 is the 8-pin answer to everything cheap and switching: buck, boost and inverting converters built from one die with a 1.25V reference, an internal Darlington switch and current limiting set by a single sense resistor. It appears in ten million car chargers, adapter boards and appliance supplies, and its substitution story is the cleanest in the analog world: MC34063A and MC33063A are the same silicon under different temperature grades (commercial and industrial), with NCV and CW prefixes walking the same line. The design story is also the buying story: almost every failure and every fake argument in this part lives in the sense resistor and the timing capacitor - the two components the datasheet formulas exist for. |
| Reference Part | MC34063 | - |
| Role In Circuit | - | Original Reference Part |
| Sourcing Advantage | Multi-fab commodity; both grades documented. | - |
| Sourcing Status | - | Active Shenzhen Spot Sourcing (24–48h) |
| Case | DIP-8 / SOIC-8 | DIP-8 / SOIC-8 |