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L78M09CDT-TR
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STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# L78M09CDT-TR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)++L78M09CDT-TR from STMicroelectronics, in a TO-252-2(DPAK). 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. For a 9 V output, V_I must be at least a few volts above V_O; absolute maximum V_I = 35 V (for V_O = 5-18 V). A 0.33 uF ceramic capacitor to GND is recommended close to the pin. |+| 2 | GROUND | power_in | Common ground reference. On DPAK, pin 2 is electrically tied to the exposed heat-sink tab, which is the primary thermal path (R_thJC = 8 C/W, R_thJA = 100 C/W). Solder the tab to a copper pour for heat dissipation. |+| 3 | OUTPUT | power_out | Regulated +9 V DC output, up to 0.5 A (peak >0.5 A with adequate heatsinking). Internally current-limited and SOA-protected. A 0.1 uF ceramic capacitor to GND is recommended to improve transient response and stability. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | TO-252-2(DPAK) |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `L78M09CDT-TRT`+- `L78M09CDT-TRP`+- `L78M09CDT-TRDT-TR`+- `L78M09CDT-TRDT`+- `L78M09CDT-TRDT`++## CAD (KiCad official)++- Symbol: `L78M09CDT-TR`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/l78m09cdt-tr.pdf) (47 pp, sha256 `7cee4c5f6a43332c`, 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](docs/l78m09cdt-tr-datasheet.pdf)
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