MC78M12CDTRKG
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | TO-252-3, DPak (2 Leads + Tab), SC-63 |
| Mfr | onsemi |
| Mounting Type | Surface Mount |
| Operating Temperature | 0°C ~ 125°C |
| Voltage - Input (Max) | 35V |
| Output Type | Fixed |
| Current - Output | 500mA |
| Supplier Device Package | DPAK |
| Output Configuration | Positive |
| Control Features | - |
| Voltage - Output (Min/Fixed) | 12V |
| Voltage - Output (Max) | - |
| Number of Regulators | 1 |
| Protection Features | Over Temperature, Short Circuit |
| PSRR | 80dB (120Hz) |
| Voltage Dropout (Max) | - |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | MC78M12 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,500 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
MC78M12CDTRKG Linear Voltage Regulator IC Positive Fixed 1 Output 500mA
The MC78M12CDTRKG is an onsemi 500mA positive fixed linear voltage regulator from the MC78M00/MC7800 family, packaged in a surface-mount DPAK-3 and shipped on tape and reel for automated SMT assembly. It delivers a stable 12V output from a 14V to 35V input range, making it a simple, rugged, and cost-effective solution for local, on-card voltage regulation in 12V-rail subsystems. The device requires no external components: internal current limiting, thermal-shutdown circuitry, and safe-area compensation for the series pass transistor combine to make it highly resilient under most operating conditions, with a maximum continuous output of 500mA when adequately heat-sunk.
Highlights
● Fixed 12V positive output, 500mA continuous capability (700mA peak at 25°C junction), with 2V typical dropout for straightforward 14V-to-35V input designs.
● No external components required, simplifying schematic and PCB layout versus LDOs that need bias or feed-forward networks.
● Internal thermal-overload protection, short-circuit current limiting, and output-transistor safe-area compensation ensure ruggedness under fault conditions.
● 80dB typical power-supply rejection at 120Hz, 75µV output noise, and ±0.2mV/°C average temperature coefficient for clean, stable 12V rails.
● 3.2mA typical quiescent current, 50mV line regulation, and 240mV load regulation across the full 5mA-to-500mA range.
FAQ
Q: What is the key advantage of the MC78M12CDTRKG?
A: It provides a robust, fixed 12V/500mA output with integrated thermal and short-circuit protection in a standard DPAK-3, requiring zero external components for most 14V-to-30V input applications.
Q: Is the MC78M12CDTRKG recommended for new designs?
A: Yes, the part is Active and RoHS3-compliant, making it suitable for new designs; for tape-and-reel procurement, the direct alternative MC78M12ACDTRKG offers identical electrical performance with different packaging format.
Alternative Parts
1. L78M12ABDT-TR (STMicroelectronics): A 12V/500mA DPAK regulator that extends operating temperature to -40°C to +125°C and adds over-current protection, ideal when wider thermal range is needed.
2. L78M12CDT-TR (STMicroelectronics): Pin-compatible 12V/500mA DPAK regulator with 0°C to +125°C range, suitable as a cross-vendor second source with identical electrical performance.
3. AS7812ADTR-G1 (Diodes Incorporated): A 12V/1A DPAK regulator offering double the output current of the MC78M12CDTRKG while maintaining the same footprint, perfect for designs needing extra headroom.
4. BA78M12FP-E2 (Rohm Semiconductor): A 12V/500mA DPAK regulator with 55dB ripple rejection and -40°C to +85°C range, useful when a Rohm-sourced alternative is preferred for supply-chain continuity.
