# NCV78M08BDTRKG

**onsemi** · Linear Voltage Regulators (LDO) · DPAK

NCV78M08BDTRKG from onsemi, in a DPAK. 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 | Input | power_in | Unregulated input voltage pin; maximum input voltage is 35 Vdc for 5.0 V-18 V versions, and a 0.33 µF or larger bypass capacitor is recommended close to this pin if supply wires are long. |
| 2 | Ground | power_in | Ground pin, also connected internally to the heatsink surface (tab, shown as terminal 4 in the case outline). |
| 3 | Output | power_out | Regulated 8.0 V output (7.70 V to 8.30 V at TJ = 25°C) for the NCV78M08B, with a maximum output current of 500 mA with adequate heatsinking. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DPAK |
| Category | Power Management ICs |
| 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 | 7.7 | 8 | 8.3 | Vdc | TJ = 25°C | 3 |
| Output Voltage Variation | VO | 7.6 |  | 8.4 | Vdc | 10.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA | 3 |
| Line Regulation | Regline |  | 6 | 50 | mV | TJ = 25°C, 10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA | 3 |
| Load Regulation | Regload |  | 25 | 160 | mV | TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA | 3 |
| Load Regulation | Regload |  | 10 | 80 | mV | TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA | 3 |
| Input Bias Current (TJ = 25°C) | IIB |  | 3.2 | 6 | mA | TJ = 25°C | 3 |
| Quiescent Current Change | IIB |  |  | 0.8 | mA | 10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA | 3 |
| Quiescent Current Change | IIB |  |  | 0.5 | mA | 5.0 mA ≤ IO ≤ 350 mA | 3 |
| Ripple Rejection | RR | 56 |  |  | dB | IO = 100 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V | 3 |
| Ripple Rejection | RR | 56 | 80 |  | dB | IO = 300 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V, TJ = 25°C | 3 |
| Maximum Input Voltage (5.0 V−18 V output group) | VI |  |  | 35 | Vdc | (5.0 V−18 V) | 2 |
| Operating Junction Temperature Range | TJ |  |  | 150 | °C |  | 2 |
| Storage Temperature Range | Tstg | -65 |  | 150 | °C |  | 2 |
| Thermal Resistance, Junction-to-Air (DT suffix) | θJA |  | 92 |  | °C/W | DT suffix (DPAK) | 2 |
| Thermal Resistance, Junction-to-Case (DT suffix) | θJC |  | 5 |  | °C/W | DT suffix (DPAK) | 2 |
| Dropout Voltage (TJ = 25°C) | VI−VO |  | 2 |  | Vdc | TJ = 25°C | 3 |
| Short Circuit Current Limit | IOS |  | 350 |  | mA | TJ = 25°C, VI = 35 V | 3 |
| Average Temperature Coefficient of Output Voltage | VO/T |  | 0.2 |  | mV/°C | IO = 5.0 mA | 3 |
| Peak Output Current (TJ = 25°C) | IO |  | 700 |  | mA | TJ = 25°C | 3 |
| Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) | Vn |  | 52 |  | V | TA = 25°C, 10 Hz ≤ f ≤ 100 kHz | 3 |

## CAD (KiCad official)

- Symbol: `NCV78M08BDTRKG`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: DPAK (KiCad packages3D, STEP)
- 3D model files: `ncv78m08bdtrkg-etched.step` / `ncv78m08bdtrkg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncv78m08bdtrkg.step` / `ncv78m08bdtrkg.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/ncv78m08bdtrk-d.pdf) (16 pp, sha256 `e443e04634baeb42`, retrieved 2026-11-08, 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/ncv78m08bdtrkg-datasheet.pdf)