# NCP718ASN300T1G

**onsemi** · Linear Voltage Regulators (LDO) · TSOT-23-5

NCP718ASN300T1G 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 | IN | power_in | Input pin; a small capacitor (at least 1 µF ceramic) is needed from this pin to ground to assure stability, operating input range 2.5 V to 24 V. |
| 2 | GND | power_in | Power supply ground. |
| 3 | EN | input | Enable pin; driving it high (above 1.2 V) turns on the regulator and driving it low (below 0.4 V) puts the regulator into shutdown mode. |
| 4 | NC/ADJ | unconnected | On this fixed 3.0 V version it is a no-connection pin that can be tied to ground to improve thermal dissipation or left disconnected (feedback pin only on the adjustable version). |
| 5 | OUT | power_out | Regulated output voltage pin (3.0 V for this version); a small 1 µF ceramic capacitor is needed from this pin to ground to assure stability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSOT-23-5 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating Input Voltage | VIN | 2.5 |  | 24 | V |  | 3 |
| Output Voltage Accuracy (fixed versions, VOUT ≥ 1.8 V) | VOUT | -2 |  | 2 | % | −40°C ≤ TJ ≤ 125°C, VOUT + 1 V < VIN < 16 V, 0.1 mA < IOUT < 300 mA | 3 |
| Line Regulation | RegLINE |  |  | 10 | mV | VOUT + 1 V ≤ VIN ≤ 16 V, Iout = 1 mA | 3 |
| Load Regulation | RegLOAD |  |  | 10 | mV | IOUT = 0.1 mA to 300 mA | 3 |
| Dropout Voltage (TSOT-23-5, VOUT 2.8 V − 3.2 V) | VDO |  | 295 | 465 | mV | VDO = VIN, (VOUT(NOM), 3%), IOUT = 300 mA | 3 |
| Maximum Output Current | ILIM | 300 |  | 800 | mA | VIN = VOUT + 1 V | 3 |
| Disable Current | IDIS |  | 0.1 | 1 | µA | VEN = 0 V, VIN = 5 V | 3 |
| Quiescent Current | IQ |  | 4 | 8 | µA | IOUT = 0 mA, −40°C ≤ TJ ≤ 125°C | 3 |
| Ground Current | IGND |  |  | 50 | µA | IOUT = 10 mA | 3 |
| Ground Current | IGND |  |  | 300 | µA | IOUT = 300 mA | 3 |
| Enable Input Threshold Voltage (high) | VEN_HI | 1.2 |  |  | V | Voltage increasing | 3 |
| Enable Input Threshold Voltage (low) | VEN_LO |  |  | 0.4 | V | Voltage decreasing | 3 |
| EN Pin Current | IEN |  |  | 100 | nA | VEN = 5.5 V | 3 |
| Active Output Discharge Resistance | Rdis |  | 100 |  |  | VIN = 5.5 V, VEN = 0 V | 3 |
| Thermal Shutdown Temperature | TSD |  | 165 |  | °C | Temperature increasing from TJ = +25°C | 3 |
| Thermal Shutdown Hysteresis | TSDH |  | 25 |  | °C | Temperature falling from TSD | 3 |
| Input Voltage (absolute maximum) | VIN | -0.3 |  | 24 | V |  | 2 |
| Enable Voltage (absolute maximum) | VEN | -0.3 |  |  | V |  | 2 |
| Output Voltage (absolute maximum) | VOUT | -0.3 |  | 6 | V |  | 2 |
| Maximum Junction Temperature | TJ(MAX) |  |  | 150 | °C |  | 2 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 2 |
| ESD Capability, Human Body Model | ESDHBM |  |  | 2000 | V |  | 2 |
| ESD Capability, Charged Device Model | ESDCDM |  |  | 1000 | V |  | 2 |
| Thermal Resistance, Junction-to-Air (TSOT-23-5) | RJA |  | 235 |  | °C/W | TSOT-23-5 package | 2 |

## CAD (KiCad official)

- Symbol: `NCP718ASN300T1G`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-5`
- 3D model: TSOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ncp718asn300t1g-etched.step` / `ncp718asn300t1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncp718asn300t1g.step` / `ncp718asn300t1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/ncp718asn300t1-d.pdf) (10 pp, sha256 `4ce0273886958662`, retrieved 2026-11-07, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/ncp718asn300t1g-datasheet.pdf)