The MC78M00/MC78M00A Series positive voltage regulators are identical to the popular MC7800 Series devices, except that they are specified for only half the output current. Like the MC7800 devices, the MC78M00 three-terminal regulators are intended for local, on-card voltage regulation. Internal current limiting, thermal shutdown circuitry and safe-area compensation for the internal pass transistor combine to make these devices remarkably rugged under most operating conditions. Maximum output current, with adequate heatsinking is 500 mA.
The MC78M00 series are three‑terminal positive voltage regulators offering 500 mA output current with internal thermal overload protection, short‑circuit current limiting and safe‑area compensation. They are intended for local, on‑card voltage regulation and are available in 5 V, 8 V, 12 V and 15 V output options.
The document lists maximum ratings, detailed electrical characteristics for each voltage option, and package dimensions for TO‑220, DPAK‑3 and other package styles. Ordering information and contact details for ON Semiconductor technical support are also provided.
| Maximum output current | 500 mA |
|---|---|
| Input voltage range | 5.0 V‑18 V |
| Available output voltages | 5.0 V, 8.0 V, 12 V, 15 V |
| Thermal resistance (junction‑to‑air, plastic, T suffix) | 70 °C/W |
| Dropout voltage | 2.0 V |
| Short‑circuit current limit | 50 mA |
| Peak output current | 700 mA |
The series can deliver up to 500 mA of output current when adequately heatsunk.
No external components are required for operation.
They include internal thermal overload protection, internal short‑circuit current limiting, and output transistor safe‑area compensation.