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Product Detailed Parameters
- Description：IC REG LINEAR 12V 500MA IPAK
- 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 ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-251-3 Short Leads, IPAK, TO-251AA
- Supplier Device Package：IPAK
- Grade：-
- Qualification：-
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Overview
The L78M12CDT-1 is a three-terminal positive linear voltage regulator from the L78Mxx series, manufactured by STMicroelectronics. It provides a fixed 12 V output with a maximum continuous current of 500 mA. The device supports an input voltage range up to 35 V and operates within a temperature range of 0 °C to +150 °C. Packaged in the IPAK (TO-251) surface-mount format, it features low static current consumption of 6 mA. Internal protections include thermal shutdown and current limiting.
Feature Summary
- Integrated thermal shutdown protection prevents damage during overheating conditions.
- Built-in current limiting safeguards the device against short circuits and overload scenarios.
- Fixed 12 V output eliminates the need for external feedback components.
Applications
- Local card regulation for noise elimination in power supplies
- Point-of-load regulation in electronic control units
- General-purpose positive voltage regulation in industrial equipment
Procurement Notes
Verify the package designation carefully, as the suffix 'DT' typically indicates TO-252 while 'CDT-1' specifies the IPAK variant. Confirm the operating temperature grade matches the application requirements, as variations exist between commercial and extended ranges. Ensure the supplier documentation explicitly references the L78M12CDT-1 part number to avoid confusion with similar L78M series devices.
Selection Notes
Select this component when a compact surface-mount solution is required for 12 V regulation at currents up to 500 mA. The IPAK package offers a balance between thermal performance and board space efficiency compared to larger through-hole options. Consider the dropout voltage characteristics relative to the minimum input supply available in the design.
Part Context
This component belongs to the L78Mxx family of three-terminal positive regulators. Unlike the standard L78xx series which often handles higher currents, the L78Mxx variants are optimized for moderate current applications around 500 mA. The L78M12CDT-1 specifically denotes the 12 V output version in the IPAK surface-mount package.
Replacement Considerations
Direct pin-compatible replacements include other manufacturers' equivalents such as MC78M12CDT1G or LM2931CMX-12.5/NOPB, provided the thermal and electrical specifications meet the design constraints. Verify that substitute parts offer comparable thermal resistance and protection features.
