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Product Detailed Parameters
- Description：IC REG LINEAR 12V 1.5A D2PAK
- 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)：2V @ 1A (Typ)
- Current - Output：1.5A
- Current - Quiescent (Iq)：6 mA
- Current - Supply (Max)：-
- PSRR：60dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：D2PAK
- Grade：-
- Qualification：-
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Overview
The L7812ABD2T-TR is a fixed positive linear voltage regulator from the STMicroelectronics L78xx series. It provides a nominal output voltage of 12V with a maximum continuous load current of 1.5A. The device operates within an input voltage range up to a maximum absolute rating of 35V, requiring a minimum input of approximately 14.8V for proper regulation. It features internal thermal overload protection and current limiting. The component is housed in a D2PAK (TO-263) surface-mount package with three pins, designed for efficient heat dissipation through the tab.
Feature Summary
- Fixed 12V output voltage regulation
- High current capability up to 1.5A
- Internal thermal overload and short-circuit protection
- Surface-mount D2PAK packaging for board integration
Applications
- General-purpose power supply circuits
- Local on-card regulation for distributed power systems
- Positive voltage regulators in embedded electronics
Procurement Notes
Verify the specific suffix 'AB' against official datasheets to confirm performance grades, as variations exist within the L78xx family. Ensure the D2PAK footprint matches the PCB design. Confirm RoHS compliance status if required by assembly specifications. Cross-reference the manufacturer part number directly with STMicroelectronics documentation to avoid counterfeit or obsolete stock issues.
Selection Notes
Select this component when a stable 12V rail is required at currents up to 1.5A. The D2PAK package offers better thermal performance than smaller SMD options but requires adequate copper area for heat sinking. Consider the dropout voltage requirements relative to the available input voltage headroom. This regulator is suitable for applications where efficiency is secondary to simplicity and cost-effectiveness compared to switching regulators.
Part Context
This part belongs to the widely used L78xx series of three-terminal linear regulators. The 'L78' designation indicates a standard current version, distinguishing it from the low-current L78Lxx and medium-current L78Mxx variants. The '12' specifies the 12V output, while 'AB' denotes specific electrical characteristics within the series. The 'D2T' indicates the D2PAK tape-and-reel packaging format.
Replacement Considerations
Compatible substitutes include other manufacturers' equivalents such as LM7812CD2T or MC7812BD2T, provided pinouts and thermal characteristics are verified. Within the ST portfolio, ensure the output current and voltage ratings meet application needs before substituting with other L78xx variants.
