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Product Detailed Parameters
- Description：IC REG LINEAR 12V 500MA TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：12V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：500mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：55dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 150°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The L78M12CV-DG is a three-terminal positive linear voltage regulator from the STMicroelectronics L78Mxx series. It provides a fixed output voltage of 12 V with a maximum output current of 0.5 A. The device operates within an input voltage range up to 35 V and supports through-hole mounting in a TO-220 package. It functions reliably across a temperature range of 0 °C to +125 °C, featuring internal protections for thermal overload and short circuits.
Feature Summary
- Provides local on-card regulation to eliminate distribution problems associated with single-point regulation.
- Embeds internal current limiting, thermal shut-down, and safe area protection mechanisms.
- Delivers fixed output voltage without requiring external components for basic operation.
Applications
- General-purpose power supply units requiring stable 12 V DC output.
- Battery chargers utilizing linear regulation for low-noise performance.
- Embedded systems needing reliable local voltage stabilization.
Procurement Notes
Verify that the specific part number L78M12CV-DG matches the required 0.5 A current rating, as standard L7812 variants often support 1.5 A. Confirm the suffix 'DG' corresponds to the correct RoHS-compliant tube packaging configuration for your assembly process. Ensure the TO-220 footprint aligns with your PCB design constraints before finalizing procurement orders.
Selection Notes
Select this component when a fixed 12 V output at 0.5 A is sufficient for the load requirements. It is suitable for applications where simplicity and low cost are prioritized over high efficiency. Consider alternative packages like DPAK if space constraints exist, or higher-current variants if the load exceeds 0.5 A. Verify thermal management capabilities based on the expected voltage drop and ambient temperature conditions.
Part Context
This component belongs to the L78Mxx family of three-terminal positive regulators, designed for general-purpose applications. Unlike the standard L78xx series which typically supports 1.5 A, the L78Mxx sub-series is optimized for lower current outputs around 0.5 A. These regulators are widely used in consumer electronics and industrial equipment due to their robust internal protection features and ease of integration into power supply designs.
Replacement Considerations
Direct substitutes include other manufacturers' equivalents such as LM78M12 or MC78M12. For pin-compatible replacements within the same series, verify that the replacement maintains the 0.5 A output current capability and TO-220 package dimensions. Ensure any cross-brand substitute meets the same electrical specifications and thermal protection characteristics.
