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L7809ABD2T-TR

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by Ray

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, D2PAK. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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L7809ABD2T-TR

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · D2PAK

L7809ABD2T-TR from STMicroelectronics, in a D2PAK. 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 DC input. Absolute maximum input voltage is 35 V (for VO = 5-18 V variants, which includes the 9 V L7809). A 0.33 µF bypass capacitor to GND is recommended close to the pin to maintain stability and suppress input transients. Typical dropout voltage is ~2 V at 1 A load.
2 GND power_in Common ground reference for both the input and output. Also serves as the exposed heat-sinking tab of the D²PAK, which is electrically connected to GND - the tab is soldered to the PCB ground copper for thermal dissipation (RthJC = 3 °C/W for D²PAK).
3 OUTPUT power_out Regulated +9 V DC output (typ 9 V, tolerance ±2% for A-grade). Delivers up to 1.5 A with adequate heat sinking; internally current-limited and SOA-protected. A 0.1 µF ceramic output capacitor to GND is recommended for load-transient response and stability.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package D2PAK
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • L7809ABD2T-TR
  • L7809ABD2T-TRCV
  • L7809ABD2T-TRACV
  • L7809ABD2T-TRABV
  • L7809ABD2T-TRCP
  • L7809ABD2T-TRACP
  • L7809ABD2T-TRABP
  • L7809ABD2T-TRDT-TR
  • L7809ABD2T-TRDT

CAD (KiCad official)

  • Symbol: L7809ABD2T-TR
  • Footprint: Package_TO_SOT_SMD:TO-263-2
  • 3D model: D2PAK (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (55 pp, sha256 ca2cee3c82e6b40e, 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).

Datasheet PDF