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MC78L18ACPRMG
Public Made by Adomby adom
onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MC78L18ACPRMG
onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92
MC78L18ACPRMG from onsemi, in a TO-92. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Output | power_out | Regulated 18 V output of this MC78L18A device, with internal short-circuit current limiting and thermal overload protection; the datasheet states up to 100 mA supply capability for the series. |
| 2 | Ground | power_in | Common ground that must be shared between the input and output voltages in the standard application. |
| 3 | Input | power_in | Unregulated input that must remain typically 2.0 V above the output voltage even at the low point of the input ripple, with an absolute maximum input voltage of 35 V for the 12 V to 18 V device range. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-92 |
| 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 (TJ = +25°C) | VO | 17.3 | 18 | 18.7 | Vdc | VI = 27 V, IO = 40 mA, TJ = +25°C | 5 |
| Output Voltage (21.4 Vdc ≤ VI ≤ 33 Vdc, 1.0 mA ≤ IO ≤ 40 mA) | VO | 17.1 | 18.9 | Vdc | 21.4 Vdc ≤ VI ≤ 33 Vdc, 1.0 mA ≤ IO ≤ 40 mA | 5 | |
| Output Voltage (VI = 27 V, 1.0 mA ≤ IO ≤ 70 mA) | VO | 17.1 | 18.9 | Vdc | VI = 27 V, 1.0 mA ≤ IO ≤ 70 mA | 5 | |
| Line Regulation (TJ = +25°C, IO = 40 mA) | Regline | 45 | 325 | mV | TJ = +25°C, IO = 40 mA, 21.4 Vdc ≤ VI ≤ 33 Vdc | 5 | |
| Line Regulation (TJ = +25°C, IO = 40 mA) | Regline | 35 | 275 | mV | TJ = +25°C, IO = 40 mA, 22 Vdc ≤ VI ≤ 33 Vdc | 5 | |
| Load Regulation (TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA) | Regload | 30 | 170 | mV | TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA | 5 | |
| Load Regulation (TJ = +25°C, 1.0 mA ≤ IO ≤ 40 mA) | Regload | 15 | 85 | mV | TJ = +25°C, 1.0 mA ≤ IO ≤ 40 mA | 5 | |
| Input Bias Current (TJ = +25°C) | IIB | 3.1 | 6.5 | mA | TJ = +25°C | 5 | |
| Input Bias Current (TJ = +125°C) | IIB | 6 | mA | TJ = +125°C | 5 | ||
| Input Bias Current Change (22 Vdc ≤ VI ≤ 33 Vdc) | IIB | 1.5 | mA | 22 Vdc ≤ VI ≤ 33 Vdc | 5 | ||
| Input Bias Current Change (1.0 mA ≤ IO ≤ 40 mA) | IIB | 0.1 | mA | 1.0 mA ≤ IO ≤ 40 mA | 5 | ||
| Ripple Rejection | RR | 33 | 48 | dB | IO = 40 mA, f = 120 Hz, 23 V ≤ VI ≤ 33 V, TJ = +25°C | 5 | |
| Dropout Voltage (TJ = +25°C) | VI − VO | 1.7 | Vdc | TJ = +25°C | 5 | ||
| Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) | Vn | 150 | V | TA = +25°C, 10 Hz ≤ f ≤ 100 kHz | 5 | ||
| Input Voltage (12 V−18 V output group) | VI | 35 | Vdc | Input voltage rating for 12 V−18 V output group | 2 | ||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Maximum Junction Temperature | TJ | 150 | °C | 2 | |||
| ESD Capability, Human Body Model | ESDHBM | 2000 | V | 2 | |||
| ESD Capability, Machine Model | ESDMM | 200 | V | 2 | |||
| ESD Capability, Charged Device Model | ESDCDM | 2000 | V | 2 | |||
| Thermal Resistance, Junction-to-Ambient, TO-92 | RJA | 200 | °C/W | TO-92 package | 2 |
CAD (KiCad official)
- Symbol:
MC78L18ACPRMG - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
mc78l18acprmg-etched.step/mc78l18acprmg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc78l18acprmg.step/mc78l18acprmg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (19 pp, sha256
38814627bd4ee874, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).
# MC78L18ACPRMG
**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92
MC78L18ACPRMG from onsemi, in a TO-92. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Output | power_out | Regulated 18 V output of this MC78L18A device, with internal short-circuit current limiting and thermal overload protection; the datasheet states up to 100 mA supply capability for the series. |
| 2 | Ground | power_in | Common ground that must be shared between the input and output voltages in the standard application. |
| 3 | Input | power_in | Unregulated input that must remain typically 2.0 V above the output voltage even at the low point of the input ripple, with an absolute maximum input voltage of 35 V for the 12 V to 18 V device range. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-92 |
| 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 (TJ = +25°C) | VO | 17.3 | 18 | 18.7 | Vdc | VI = 27 V, IO = 40 mA, TJ = +25°C | 5 |
| Output Voltage (21.4 Vdc ≤ VI ≤ 33 Vdc, 1.0 mA ≤ IO ≤ 40 mA) | VO | 17.1 | | 18.9 | Vdc | 21.4 Vdc ≤ VI ≤ 33 Vdc, 1.0 mA ≤ IO ≤ 40 mA | 5 |
| Output Voltage (VI = 27 V, 1.0 mA ≤ IO ≤ 70 mA) | VO | 17.1 | | 18.9 | Vdc | VI = 27 V, 1.0 mA ≤ IO ≤ 70 mA | 5 |
| Line Regulation (TJ = +25°C, IO = 40 mA) | Regline | | 45 | 325 | mV | TJ = +25°C, IO = 40 mA, 21.4 Vdc ≤ VI ≤ 33 Vdc | 5 |
| Line Regulation (TJ = +25°C, IO = 40 mA) | Regline | | 35 | 275 | mV | TJ = +25°C, IO = 40 mA, 22 Vdc ≤ VI ≤ 33 Vdc | 5 |
| Load Regulation (TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA) | Regload | | 30 | 170 | mV | TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA | 5 |
| Load Regulation (TJ = +25°C, 1.0 mA ≤ IO ≤ 40 mA) | Regload | | 15 | 85 | mV | TJ = +25°C, 1.0 mA ≤ IO ≤ 40 mA | 5 |
| Input Bias Current (TJ = +25°C) | IIB | | 3.1 | 6.5 | mA | TJ = +25°C | 5 |
| Input Bias Current (TJ = +125°C) | IIB | | | 6 | mA | TJ = +125°C | 5 |
| Input Bias Current Change (22 Vdc ≤ VI ≤ 33 Vdc) | IIB | | | 1.5 | mA | 22 Vdc ≤ VI ≤ 33 Vdc | 5 |
| Input Bias Current Change (1.0 mA ≤ IO ≤ 40 mA) | IIB | | | 0.1 | mA | 1.0 mA ≤ IO ≤ 40 mA | 5 |
| Ripple Rejection | RR | 33 | 48 | | dB | IO = 40 mA, f = 120 Hz, 23 V ≤ VI ≤ 33 V, TJ = +25°C | 5 |
| Dropout Voltage (TJ = +25°C) | VI − VO | | 1.7 | | Vdc | TJ = +25°C | 5 |
| Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) | Vn | | 150 | | V | TA = +25°C, 10 Hz ≤ f ≤ 100 kHz | 5 |
| Input Voltage (12 V−18 V output group) | VI | | | 35 | Vdc | Input voltage rating for 12 V−18 V output group | 2 |
| Storage Temperature Range | Tstg | -65 | | 150 | °C | | 2 |
| Maximum Junction Temperature | TJ | | | 150 | °C | | 2 |
| ESD Capability, Human Body Model | ESDHBM | | | 2000 | V | | 2 |
| ESD Capability, Machine Model | ESDMM | | | 200 | V | | 2 |
| ESD Capability, Charged Device Model | ESDCDM | | | 2000 | V | | 2 |
| Thermal Resistance, Junction-to-Ambient, TO-92 | RJA | | 200 | | °C/W | TO-92 package | 2 |
## CAD (KiCad official)
- Symbol: `MC78L18ACPRMG`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `mc78l18acprmg-etched.step` / `mc78l18acprmg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc78l18acprmg.step` / `mc78l18acprmg.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588929664567398400) (19 pp, sha256 `38814627bd4ee874`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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/mc78l18acprmg-datasheet.pdf)