# LM1085T-5.0

**HGSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220-3

LM1085T-5.0 from HGSEMI, in a TO-220-3. 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 pin on the ADJ version and ground reference pin on the fixed 3.3V/5.0V versions, to be kept close to the load ground to reduce line-resistance drops. |
| 2 | VOUT | power_out | Regulated output (5V, 4.9V to 5.1V for LM1085-5.0) with up to 3A load current, also connected to the tab, with 3.2A minimum current limit. |
| 3 | VIN | power_in | Input supply pin with absolute maximum of 15V and recommended 10V, requiring about 1.5V dropout at 3A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-220-3 |
| 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 (LM1085-5.0) | Vout | 4.9 | 5 | 5.1 | V | 0 ≤ IOUT ≤ IFULL LOAD, 6.8V ≤ VIN ≤ 10V (PD<30W) | 5 |
| Operating temperature range (design range, industrial grade) | TA | -40 |  | 125 | °C |  | 4 |
| Input voltage (recommended) | VIN |  |  | 10 | V |  | 4 |
| Power supply voltage (absolute maximum) | VIN |  |  | 15 | V |  | 4 |
| Maximum output current | Iout |  |  | 3 | A |  | 4 |
| Chip power dissipation | PD |  |  | 30 | W |  | 4 |
| Maximum operating junction temperature | TJ |  |  | 150 | ℃ |  | 4 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 4 |
| ESD protection (human body discharge) | ESD |  |  | 2 | KV |  | 4 |
| Lead soldering temperature (TO-220/TO-263 package) | TL |  |  | 245 | ℃ | TO-220/TO-263 package | 4 |
| Line regulation (LM1085-5.0) | ΔVout |  |  | 12 | mV | IOUT = 0mA, 6.8V ≤ VIN ≤ 10V | 5 |
| Load regulation (LM1085-5.0) | ΔVout |  |  | 40 | mV | VIN = 8V, 0 ≤ IOUT ≤ IFULL LOAD | 5 |
| Dropout voltage (shared row for ADJ, 3.3, 5) | Dropout |  |  | 1.5 | V | ΔVREF, ΔVOUT = 1%, IOUT = 3A | 5 |
| Current limit | ILimt | 3.2 | 4.5 |  | A | VIN-VOUT=3V | 5 |
| Quiescent current | Icc |  | 5 | 15 | mA | Vin-Vout<10V | 5 |
| ADJ pin leakage current | Iadj |  | 50 | 120 | uA |  | 5 |
| ADJ pin current change | ΔIadj |  |  | 5 | uA | 10mA ≤ IOUT ≤ IFULL LOAD, 1.5V ≤ VIN−VOUT ≤ 10V | 5 |

## CAD (KiCad official)

- Symbol: `LM1085T-5.0`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220-3 (KiCad packages3D, STEP)
- 3D model files: `lm1085t-5-0-etched.step` / `lm1085t-5-0-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm1085t-5-0.step` / `lm1085t-5-0.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758770534027149312) (12 pp, sha256 `f85647044f09c0eb`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/lm1085t-5-0-datasheet.pdf)