# LD1086BV-DG

**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

LD1086BV-DG from STMicroelectronics, in a TO-220. 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 | ADJ/GND | passive | Adjust terminal that sets the output voltage of the adjustable LD1086B; the datasheet gives an adjust pin current of 40 µA typical and 120 µA maximum at VI = 4.25 V and IO = 10 mA. |
| 2 | OUTPUT | power_out | Regulated output of the LD1086, rated up to 1.5 A, with the TAB physically connected to this output node. |
| 3 | IN | power_in | Unregulated input supply to the regulator, with a DC input voltage absolute maximum of 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-220 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference voltage | Vref | 1.231 | 1.25 | 1.269 | V | IO = 10 mA, TJ = 25 °C | 13 |
| Reference voltage | Vref | 1.219 | 1.25 | 1.281 | V | IO = 10 mA to 1.5 A, VI = 2.85 to 30 V | 13 |
| Line regulation | ΔVO |  | 0.015 | 0.2 | % | IO = 10 mA, VI = 2.8 to 16.5 V, TJ = 25 °C | 13 |
| Line regulation | ΔVO |  | 0.035 | 0.2 | % | IO = 10 mA, VI = 2.8 to 16.5 V | 13 |
| Load regulation | ΔVO |  | 0.1 | 0.3 | % | IO = 10 mA to 1.5 A, TJ = 25 °C | 13 |
| Load regulation | ΔVO |  | 0.2 | 0.4 | % | IO = 0 to 1.5 A | 13 |
| Dropout voltage | Vd |  | 1.3 | 1.5 | V | IO = 1.5 A | 13 |
| Minimum load current | IO(min) |  | 3 | 10 | mA | VI = 30 V | 13 |
| Short-circuit current | Isc |  | 1.5 | 2.3 | A | VI - VO = 5 V | 13 |
| Short-circuit current | Isc |  | 0.05 | 0.2 | A | VI - VO = 25 V | 13 |
| Thermal regulation |  |  | 0.01 | 0.04 | %/W | TA = 25 °C, 30 ms pulse | 13 |
| Supply voltage rejection | SVR |  | 60 | 88 | dB | f = 120 Hz, CO = 25 µF, CADJ = 25 µF, IO = 1.5 A, VI = 6.25 ± 3 V | 13 |
| Adjust pin current | IADJ |  | 40 | 120 | µA | VI = 4.25 V, IO = 10 mA | 13 |
| Adjust pin current change | ΔIADJ |  | 0.2 | 5 | µA | IO = 10 mA to 1.5 A, VI = 2.8 to 16.5 V | 13 |
| Input voltage (DC) | VI |  |  | 30 | V |  | 7 |
| Storage temperature range | TSTG | -55 |  | 150 | °C |  | 7 |
| Junction temperature range | TJ | -40 |  | 150 | °C |  | 7 |
| Thermal resistance junction-case (TO-220) | RthJC |  | 5 |  | °C/W | TO-220 package | 7 |
| Thermal resistance junction-ambient (TO-220) | RthJA |  | 50 |  | °C/W | TO-220 package | 7 |
| Operating temperature range |  | -40 |  | 125 | °C | Wide operating temperature range (features list) | 1 |

## CAD (KiCad official)

- Symbol: `LD1086BV-DG`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `ld1086bv-dg-etched.step` / `ld1086bv-dg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ld1086bv-dg.step` / `ld1086bv-dg.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/8590426402143952896) (40 pp, sha256 `bed15f446d51200c`, retrieved 2026-10-11, 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/ld1086bv-dg-datasheet.pdf)