MC78LC18NTRG

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TSOT-23-5

MC78LC18NTRG from onsemi, in a TSOT-23-5. 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	GND	power_in	Power supply ground.
2	Vin	power_in	Positive power supply input voltage; the maximum rating is 12 V.
3	Vout	power_out	Regulated output voltage; the maximum rating is −0.3 V to Vin +0.3 V.
4	N/C	unconnected	No internal connection.
5	N/C	unconnected	No internal connection.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	TSOT-23-5
Category	Power Management (PMIC)
Pins	5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Input Voltage	Vin			12	V		2
Output Voltage (Vout) range vs Vin	Vout	-0.3			V	Printed as −0.3 to Vin +0.3	2
Power Dissipation (Case 483, NTR Suffix)	PD			140	mW	TA = 85°C	2
Thermal Resistance, Junction-to-Ambient (Case 483, NTR Suffix)	RJA		280		°C/W	Junction-to-ambient	2
Operating Junction Temperature	TJ			125	°C		2
Operating Ambient Temperature	TA	-40		85	°C		2
Storage Temperature	Tstg	-55		150	°C		2
Lead Soldering Temperature	Tsolder			10	sec	@ 260°C	2
Output Voltage (1.8 V)	Vout	1.746	1.8	1.854	V	TA = 25°C, Iout = 1.0 mA	3
Line Regulation	Regline		0.05	0.2	%/V	Vin = VO(nom.) + 1.0 V to 12 V, Iout = 1.0 mA	3
Load Regulation	Regload		40	60	mV	Iout = 1.0 mA to 10 mA	3
Output Current (1.8 V)	Iout	35	50		mA	1.5 V, 1.8 V (Vin = 4.0 V)	3
Dropout Voltage (1.6 V to 3.2 V output row)	Vin−Vout		30	60	mV	Iout = 1.0 mA, Measured at Vout −3.0%	3
Quiescent Current	IQ		1.1	3.6	A	Iout = 1.0 mA to IO(nom.)	3

CAD (KiCad official)

Symbol: MC78LC18NTRG
Footprint: Package_TO_SOT_SMD:TSOT-23-5
3D model: TSOT-23-5 (KiCad packages3D, STEP)
3D model files: mc78lc18ntrg-etched.step / mc78lc18ntrg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc78lc18ntrg.step / mc78lc18ntrg.glb are the bare package body.

Provenance

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

Datasheet: onsemi datasheet (13 pp, sha256 0d5c5a33ef7a10db, retrieved 2026-10-19, 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

# MC78LC18NTRG

**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TSOT-23-5

MC78LC18NTRG from onsemi, in a TSOT-23-5. 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 | GND | power_in | Power supply ground. |
| 2 | Vin | power_in | Positive power supply input voltage; the maximum rating is 12 V. |
| 3 | Vout | power_out | Regulated output voltage; the maximum rating is −0.3 V to Vin +0.3 V. |
| 4 | N/C | unconnected | No internal connection. |
| 5 | N/C | unconnected | No internal connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage | Vin |  |  | 12 | V |  | 2 |
| Output Voltage (Vout) range vs Vin | Vout | -0.3 |  |  | V | Printed as −0.3 to Vin +0.3 | 2 |
| Power Dissipation (Case 483, NTR Suffix) | PD |  |  | 140 | mW | TA = 85°C | 2 |
| Thermal Resistance, Junction-to-Ambient (Case 483, NTR Suffix) | RJA |  | 280 |  | °C/W | Junction-to-ambient | 2 |
| Operating Junction Temperature | TJ |  |  | 125 | °C |  | 2 |
| Operating Ambient Temperature | TA | -40 |  | 85 | °C |  | 2 |
| Storage Temperature | Tstg | -55 |  | 150 | °C |  | 2 |
| Lead Soldering Temperature | Tsolder |  |  | 10 | sec | @ 260°C | 2 |
| Output Voltage (1.8 V) | Vout | 1.746 | 1.8 | 1.854 | V | TA = 25°C, Iout = 1.0 mA | 3 |
| Line Regulation | Regline |  | 0.05 | 0.2 | %/V | Vin = VO(nom.) + 1.0 V to 12 V, Iout = 1.0 mA | 3 |
| Load Regulation | Regload |  | 40 | 60 | mV | Iout = 1.0 mA to 10 mA | 3 |
| Output Current (1.8 V) | Iout | 35 | 50 |  | mA | 1.5 V, 1.8 V (Vin = 4.0 V) | 3 |
| Dropout Voltage (1.6 V to 3.2 V output row) | Vin−Vout |  | 30 | 60 | mV | Iout = 1.0 mA, Measured at Vout −3.0% | 3 |
| Quiescent Current | IQ |  | 1.1 | 3.6 | A | Iout = 1.0 mA to IO(nom.) | 3 |

## CAD (KiCad official)

- Symbol: `MC78LC18NTRG`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-5`
- 3D model: TSOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `mc78lc18ntrg-etched.step` / `mc78lc18ntrg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc78lc18ntrg.step` / `mc78lc18ntrg.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/8589982228320325632) (13 pp, sha256 `0d5c5a33ef7a10db`, retrieved 2026-10-19, 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/mc78lc18ntrg-datasheet.pdf)