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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 ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The L78M12CV is a three-terminal positive linear voltage regulator from the STMicroelectronics L78M series. 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, requiring a minimum input of 14 V for regulation. It features internal thermal overload protection and short-circuit protection. The component operates within a temperature range of 0°C to +150°C and is housed in a TO-220 through-hole package.
Feature Summary
- Provides fixed positive voltage regulation with integrated current limiting and thermal shutdown capabilities.
- Designed for local on-card regulation to eliminate distribution issues associated with single-point systems.
- Includes safe area protection to ensure robust operation under varying load conditions.
Applications
- General-purpose power supply units requiring stable 12 V DC output
- Battery chargers utilizing linear regulation topology
- Industrial control equipment power distribution modules
Procurement Notes
Verify the specific suffix designation against official datasheets to confirm pinout compatibility and thermal characteristics. Ensure the procurement channel sources genuine components to avoid counterfeit risks. Confirm that the TO-220 package variant matches the intended PCB footprint and mounting requirements for the target application design.
Selection Notes
Select this component when a fixed 12 V output at 500 mA is required with high reliability. It is suitable for applications where low noise and simple implementation are prioritized over efficiency. Consider thermal management requirements due to linear regulation losses. Verify that the input voltage remains within the specified dropout limits for consistent performance.
Part Context
This part belongs to the L78Mxx family of three-terminal positive regulators, distinguished by its 500 mA current capability compared to the higher-current L78xx series. It shares functional similarities with other fixed-voltage regulators but offers specific thermal and electrical characteristics defined by the M-series designation. The TO-220 package facilitates efficient heat dissipation for moderate power applications.
Replacement Considerations
Compatible substitutes include the L78M12CDT-TR for surface-mount implementations and the L7812CV for applications requiring higher current capacity. Verify pinout alignment and thermal resistance specifications before substitution to ensure circuit integrity.
