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Product Detailed Parameters
- Description：IC REG LINEAR 9V 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)：9V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：500mA
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：56dB (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 L78M09CV-DG is a three-terminal positive linear voltage regulator from the STMicroelectronics L78 series, providing a fixed 9V output with a maximum current of 500mA. It accepts an input voltage range of 15V to 35V and operates within a junction temperature range of 0°C to 125°C. The device features internal thermal overload protection, short-circuit protection, and safe area protection. It is housed in a TO-220 package.
Feature Summary
- Fixed 9V output regulation for stable power supply applications
- Integrated thermal shutdown and current limiting for robust operation
- Designed for local on-card regulation to eliminate distribution issues
Applications
- General-purpose power supplies requiring 9V regulation
- Battery-powered equipment needing stable voltage conversion
- Embedded systems utilizing the L78 series architecture
Procurement Notes
Verify the specific suffix 'DG' against official STMicroelectronics documentation, as standard datasheets typically list 'L78M09CV'. Confirm RoHS compliance status and ensure the component matches the required TO-220 pinout and thermal characteristics before integration into designs.
Selection Notes
Select this component when a fixed 9V output at up to 500mA is required with high reliability. Consider the thermal dissipation requirements given the linear regulation nature. Ensure the input voltage remains within the specified 15V to 35V range to maintain proper dropout voltage margins.
Part Context
This part belongs to the widely used L78 series of three-terminal positive regulators. These devices are known for their simplicity and built-in protections, making them suitable for various industrial and consumer electronics where reliable, fixed-voltage regulation is essential without complex external circuitry.
Replacement Considerations
Compatible substitutes include MC78M09CT from onsemi, which offers similar electrical specifications and TO-220 packaging. Verify pin compatibility and thermal performance when transitioning between manufacturers.
