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Product Detailed Parameters
- Description：IC REG LINEAR 12V 500MA DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
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Overview
The L78M12CDT-TR is a positive linear voltage regulator from the STMicroelectronics L78Mxx series, housed in a surface-mount TO-252 (DPAK) package. 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. Key electrical parameters include a typical static current of 6 mA, line regulation of 100 mV, load regulation of 240 mV, and a power supply rejection ratio of 55 dB.
Feature Summary
- Integrated internal protection mechanisms including thermal shutdown and current limiting for enhanced operational safety.
- Requires no external components for basic operation, simplifying circuit design and reducing bill of materials.
- Fixed 12 V output ensures stable voltage delivery for sensitive analog and digital loads.
Applications
- Local on-card voltage regulation for distributed power systems.
- Power conditioning for industrial control modules and sensors.
- Pre-regulator stages for switching regulators.
Procurement Notes
Verify the specific suffix against official datasheets to confirm the operating temperature grade and package variant. Ensure the supplier source matches the manufacturer's authorized distribution channels to guarantee component authenticity and traceability. Cross-reference the part number with the latest revision history to avoid obsolete or discontinued stock variations.
Selection Notes
Select this component when low noise and high stability are prioritized over conversion efficiency. It is suitable for applications requiring a simple, robust solution for stepping down higher DC voltages to a fixed 12 V rail. Consider the thermal dissipation requirements in the TO-252 package based on the expected input-output differential and load current.
Part Context
This device belongs to the L78Mxx family of three-terminal positive linear regulators. Unlike the standard L78xx series which typically handles 1 A, the L78Mxx series is optimized for lower current applications up to 500 mA. The 'CDT' designation indicates the specific DPAK surface-mount packaging and commercial/industrial temperature rating variants available within the product line.
Replacement Considerations
Compatible substitutes include the L78M12ACDT-TR and L78M12ABDT-TR, which share identical pinouts and core electrical specifications but may differ in specified operating temperature ranges or manufacturing lot revisions.
