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L78M12ABDT-TR
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STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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l78m12abdt-tr: specified limits as data (metadata.characteristics, 20 rows from the datasheet)
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L78M12ABDT-TR
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)
L78M12ABDT-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 DC input to the regulator; for the 12 V grade the datasheet specifies operation with VI = 14.5 to 27 V (AB grade, IO = 5 to 350 mA) and an absolute maximum DC input voltage of 35 V, with a 0.33 µF input bypass capacitor recommended if the regulator is far from the supply filter. |
| 2 | GND | power_in | Ground/common reference pin, formed by the DPAK tab; thermal path to the package tab with junction-to-case thermal resistance RthJC = 8 °C/W and junction-to-ambient RthJA = 100 °C/W for the DPAK package. |
| 3 | OUTPUT | power_out | Regulated +12 V output (11.75 to 12.25 V at TJ = 25 °C for the AB grade), capable of delivering output current up to 0.5 A with internal current limiting, thermal shutdown and safe-area protection; a 0.1 µF output capacitor improves transient response though it is not required for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-252-2(DPAK) |
| Category | Power Management (PMIC) |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage | VO | 11.75 | 12 | 12.25 | V | TJ = 25°C | 17 |
| Output voltage | VO | 11.5 | 12 | 12.5 | V | IO = 5 to 350 mA, VI = 14.5 to 27 V | 17 |
| Line regulation | ΔVO | 100 | mV | VI = 14.5 to 30 V, IO = 200 mA, TJ = 25°C | 17 | ||
| Line regulation | ΔVO | 30 | mV | VI = 16 to 30 V, IO = 200 mA, TJ = 25°C | 17 | ||
| Load regulation | ΔVO | 240 | mV | IO = 5 to 500 mA, TJ = 25°C | 17 | ||
| Load regulation | ΔVO | 120 | mV | IO = 5 to 200 mA, TJ = 25°C | 17 | ||
| Quiescent current | Id | 6 | mA | TJ = 25°C | 17 | ||
| Quiescent current change | ΔId | 0.5 | mA | IO = 5 to 350 mA | 17 | ||
| Quiescent current change | ΔId | 0.8 | mA | IO = 200 mA, VI = 14.5 to 30 V | 17 | ||
| DC input voltage (for VO = 5 to 18 V) | VI | 35 | V | for VO = 5 to 18 V (applies to 12 V output) | 5 | ||
| Storage temperature range | TSTG | -65 | 150 | °C | 5 | ||
| Operating junction temperature range | TOP | -40 | 125 | °C | for L78MxxAB | 5 | |
| Output voltage drift | ΔVO/ΔT | -1 | mV/°C | IO = 5 mA | 17 | ||
| Supply voltage rejection | SVR | 55 | dB | VI = 15 to 25 V, f = 120 Hz, IO = 300 mA, TJ = 25°C | 17 | ||
| Output noise voltage | eN | 75 | µV | B = 10 Hz to 100 kHz, TJ = 25°C | 17 | ||
| Dropout voltage | Vd | 2 | V | TJ = 25°C | 17 | ||
| Short circuit current | Isc | 240 | mA | TJ = 25°C, VI = 35 V | 17 | ||
| Short circuit peak current | Iscp | 700 | mA | TJ = 25°C | 17 | ||
| Thermal resistance junction-case (DPAK) | RthJC | 8 | °C/W | DPAK | 5 | ||
| Thermal resistance junction-ambient (DPAK) | RthJA | 100 | °C/W | DPAK | 5 |
CAD (KiCad official)
- Symbol:
L78M12ABDT-TR - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
- 3D model files:
l78m12abdt-tr-etched.step/l78m12abdt-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l78m12abdt-tr.step/l78m12abdt-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (46 pp, sha256
bf25de1549fb4045, retrieved 2026-09-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-sonnet-5(text+vision), consensusclaude-opus-4-8(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# L78M12ABDT-TR
**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)
L78M12ABDT-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 DC input to the regulator; for the 12 V grade the datasheet specifies operation with VI = 14.5 to 27 V (AB grade, IO = 5 to 350 mA) and an absolute maximum DC input voltage of 35 V, with a 0.33 µF input bypass capacitor recommended if the regulator is far from the supply filter. |
| 2 | GND | power_in | Ground/common reference pin, formed by the DPAK tab; thermal path to the package tab with junction-to-case thermal resistance RthJC = 8 °C/W and junction-to-ambient RthJA = 100 °C/W for the DPAK package. |
| 3 | OUTPUT | power_out | Regulated +12 V output (11.75 to 12.25 V at TJ = 25 °C for the AB grade), capable of delivering output current up to 0.5 A with internal current limiting, thermal shutdown and safe-area protection; a 0.1 µF output capacitor improves transient response though it is not required for stability. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-252-2(DPAK) |
| Category | Power Management (PMIC) |
| Pins | 3 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage | VO | 11.75 | 12 | 12.25 | V | TJ = 25°C | 17 |
| Output voltage | VO | 11.5 | 12 | 12.5 | V | IO = 5 to 350 mA, VI = 14.5 to 27 V | 17 |
| Line regulation | ΔVO | | | 100 | mV | VI = 14.5 to 30 V, IO = 200 mA, TJ = 25°C | 17 |
| Line regulation | ΔVO | | | 30 | mV | VI = 16 to 30 V, IO = 200 mA, TJ = 25°C | 17 |
| Load regulation | ΔVO | | | 240 | mV | IO = 5 to 500 mA, TJ = 25°C | 17 |
| Load regulation | ΔVO | | | 120 | mV | IO = 5 to 200 mA, TJ = 25°C | 17 |
| Quiescent current | Id | | | 6 | mA | TJ = 25°C | 17 |
| Quiescent current change | ΔId | | | 0.5 | mA | IO = 5 to 350 mA | 17 |
| Quiescent current change | ΔId | | | 0.8 | mA | IO = 200 mA, VI = 14.5 to 30 V | 17 |
| DC input voltage (for VO = 5 to 18 V) | VI | | | 35 | V | for VO = 5 to 18 V (applies to 12 V output) | 5 |
| Storage temperature range | TSTG | -65 | | 150 | °C | | 5 |
| Operating junction temperature range | TOP | -40 | | 125 | °C | for L78MxxAB | 5 |
| Output voltage drift | ΔVO/ΔT | | -1 | | mV/°C | IO = 5 mA | 17 |
| Supply voltage rejection | SVR | | 55 | | dB | VI = 15 to 25 V, f = 120 Hz, IO = 300 mA, TJ = 25°C | 17 |
| Output noise voltage | eN | | 75 | | µV | B = 10 Hz to 100 kHz, TJ = 25°C | 17 |
| Dropout voltage | Vd | | 2 | | V | TJ = 25°C | 17 |
| Short circuit current | Isc | | 240 | | mA | TJ = 25°C, VI = 35 V | 17 |
| Short circuit peak current | Iscp | | 700 | | mA | TJ = 25°C | 17 |
| Thermal resistance junction-case (DPAK) | RthJC | | 8 | | °C/W | DPAK | 5 |
| Thermal resistance junction-ambient (DPAK) | RthJA | | 100 | | °C/W | DPAK | 5 |
## CAD (KiCad official)
- Symbol: `L78M12ABDT-TR`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
- 3D model files: `l78m12abdt-tr-etched.step` / `l78m12abdt-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l78m12abdt-tr.step` / `l78m12abdt-tr.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175025845690368) (46 pp, sha256 `bf25de1549fb4045`, retrieved 2026-09-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-sonnet-5` (text+vision), consensus `claude-opus-4-8` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/l78m12abdt-tr-datasheet.pdf)