MC78M12CDT

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MC78M12CDT is a fixed positive voltage regulator from the MC78M00 series, manufactured by onsemi. It provides a nominal output of 12 V with a maximum continuous output current of 500 mA. The device operates within an input voltage range of 14.5 V to 35 V and supports a junction temperature range of 0°C to +125°C. Packaged in a DPAK-3 (TO-252) surface-mount case, it features internal thermal overload protection, short-circuit current limiting, and safe-area compensation for the pass transistor.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Internal thermal overload protection shuts down the circuit during excessive power overload conditions.
• Internal short-circuit current limiting protects the device under fault conditions.
• Output transistor safe-area compensation reduces output short-circuit current as voltage across the pass transistor increases.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Local on-card voltage regulation
• Power supply filtering applications
• Elimination of sound and workmanship issues in pre-regulator circuits

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify that the ordering suffix matches the required package type and temperature range. Confirm RoHS compliance status and check for specific automotive qualification requirements if applicable. Ensure the supplier documentation aligns with the official datasheet specifications for electrical characteristics and mechanical dimensions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 12 V output is required with up to 500 mA load capability in a surface-mount format. Consider the dropout voltage and thermal resistance characteristics relative to the expected ambient temperature and heatsinking constraints. Verify input voltage stability to ensure operation within the specified limits.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This device belongs to the MC78M00/MC78M00A series of three-terminal positive voltage regulators. It is functionally similar to the MC7800 series but specified for half the output current. The series is designed for local regulation tasks and includes robust internal protection mechanisms to ensure reliability under various operating conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

MC78M12CDTG

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What are the primary internal protections included in the MC78M12CDT?

The device includes internal thermal overload protection, internal short-circuit current limiting, and output transistor safe-area compensation.

Is external componentry required for basic operation?

No external components are required for standard operation, although an input bypass capacitor is recommended if long wire lengths connect the regulator to the power supply filter or if the output load capacitance is large.