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l7812abd2t-tr
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STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-2. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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markdownL7812ABD2T-TR
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-2
L7812ABD2T-TR from STMicroelectronics, in a TO-263-2. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | INPUT | power_in | Unregulated positive DC input. Absolute maximum VI = 35 V for VO = 5 to 18 V variants. Typical operating VI = 19 V for the L7812AB (VO nominal + ~7 V headroom). Dropout voltage typ. 2 V at IO = 1 A. Bypass to GND with 0.33 uF (tantalum/ceramic) near the pin, especially if the supply filter is remote. |
| 2 | GROUND | power_in | Common ground reference for input and output. Also serves as the thermal pad / tab on the D2PAK package (electrically connected to GND). All quiescent current (~4.4 mA typ. for L7812AB) returns through this pin. Solder the tab to a copper pour for heat dissipation (RthJC = 3 °C/W, RthJA = 62.5 °C/W for D2PAK). |
| 3 | OUTPUT | power_out | Regulated +12 V DC output. L7812AB tolerance is +/-2% (11.75 to 12.25 V at TJ = 25 °C). Supplies up to 1 A continuously (1.5 A peak with sufficient heat sinking); internally current-limited (short-circuit current typ. 0.2 A at VI = 35 V). Bypass to GND with 0.1 uF ceramic close to the pin to improve transient response. Minimum load current for regulation is 5 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-263-2 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
L7812ABD2T-TRL7812ABD2T-TRVL7812ABD2T-TRV-DGL7812ABD2T-TRPL7812ABD2T-TRDT-TR
CAD (KiCad official)
- Symbol:
L7812ABD2T-TR - Footprint:
Package_TO_SOT_SMD:TO-263-2 - 3D model: TO-263-2 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (None pp, sha256
f7b390b5c05e0aba, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).