# LHR3020AFAA

**Legendsemi** · Voltage Reference · SOP-8

LHR3020AFAA from Legendsemi, in a SOP-8. 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 | DNC | unconnected | Do not connect this pin. |
| 2 | VIN | power_in | Supply voltage input; VIN must be at least VOUT + 0.2V and no more than 18V (LHR3020 minimum VIN is 2.7V). |
| 3 | TEMP | output | Temperature monitor output providing a temperature-related voltage (668mV + 1.91mV/°C × T), with high output impedance that must be buffered under load. |
| 4 | GND | power_in | Ground reference pin for the device. |
| 5 | NC | unconnected | No internal connection. |
| 6 | VOUT | output | Voltage reference output, rated for ±10mA source and sink, which must be decoupled with a 1μF to 50μF capacitor to GND. |
| 7 | DNC | unconnected | Do not connect this pin. |
| 8 | DNC | unconnected | Do not connect this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Legendsemi |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## 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 | -0.2 |  | 18 | V |  | 4 |
| Output short to ground |  | 0 |  | 30 | mA |  | 4 |
| Output voltage range |  | -0.2 |  | 5.5 | V |  | 4 |
| Operating temperature |  | -55 |  | 125 | °C |  | 4 |
| Junction temperature (TJ max) | TJ |  |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| Input voltage (operating) | VIN |  |  | 18 | V | VIN minimum is VOUT+0.2V | 5 |
| Output current | IOUT | -10 |  | 10 | mA |  | 5 |
| Junction-to-ambient thermal resistance (SOP-8) | RθJA |  | 160.9 |  | °C/W | SOP-8 (DGK) | 5 |
| Junction-to-case top thermal resistance (SOP-8) | RθJC(top) |  | 53.9 |  | °C/W | SOP-8 (DGK) | 5 |
| Junction-to-board thermal resistance (SOP-8) | RθJB |  | 82.3 |  | °C/W | SOP-8 (DGK) | 5 |
| Junction-to-top characterization parameter (SOP-8) | ψJT |  | 5.1 |  | °C/W | SOP-8 (DGK) | 5 |
| Junction-to-board characterization parameter (SOP-8) | ψJB |  | 80.7 |  | °C/W | SOP-8 (DGK) | 5 |
| Output voltage LHR3020 | VOUT |  | 2.048 |  | V | 2.7V<VIN<18V | 5 |
| Initial accuracy, high grade |  | -0.05 |  | 0.05 | % | All voltage options (1) | 5 |
| Output voltage temperature drift, high grade | δVOUT/dT |  | 1 | 3 | ppm/°C | High grade | 5 |
| Line regulation | δVO(δVI) |  | 0.1 | 1 | ppm/V | VIN = (VOUT + 0.2) to 18V (2) | 5 |
| Line regulation over temperature | δVO(δVI) |  | 0.2 | 1 | ppm/V | VIN = VOUT + 0.2V, TA = -40°C to 125°C (2) | 5 |
| Load regulation | δVO(δIL) |  | 20 | 30 | ppm/mA | -10mA < ILOAD < 10mA, VIN = VOUT + 0.75V (3) | 5 |
| Load regulation over temperature | δVO(δIL) |  |  | 50 | ppm/mA | -10mA < ILOAD < 10mA, VIN = VOUT + 0.75V, TA = -40°C to 125°C (3) | 6 |
| Short-circuit current | ISC |  | 25 |  | mA | VOUT = 0 | 6 |
| Thermal hysteresis, high grade SOP-8 cycle 1 |  |  | 70 |  | ppm | High grade SOP-8 cycle 1 | 6 |
| Thermal hysteresis, high grade SOP-8 cycle 2 |  |  | 50 |  | ppm | High grade SOP-8 cycle 2 | 6 |
| Long-term stability SOP-8 0 to 1000 h |  |  | 100 |  | ppm/1000 h | SOP-8 0 to 1000 hours | 6 |
| Long-term stability SOP-8 1000 to 2000 h |  |  | 50 |  | ppm/1000 h | SOP-8 1000 to 2000 hours | 6 |
| TEMP pin output voltage |  |  | 668 |  | mV | TA = 25°C | 6 |
| TEMP pin temperature sensitivity |  |  | 1.91 |  | mV/°C | TA = -40°C to 125°C | 6 |
| Supply voltage | Vs |  |  | 18 | V | Minimum VOUT+0.2V | 6 |
| Quiescent current |  |  | 0.8 | 1 | mA |  | 6 |
| Quiescent current over temperature |  |  |  | 1.2 | mA | TA = -40°C to 125°C | 6 |
| Output voltage noise |  |  | 1.5 |  | µVPP/V | F=0.1Hz to 10Hz | 5 |
| Specified temperature range |  | -40 |  | 125 | °C |  | 6 |
| Operating temperature range |  | -55 |  | 125 | °C |  | 6 |

## CAD (KiCad official)

- Symbol: `LHR3020AFAA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lhr3020afaa-etched.step` / `lhr3020afaa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lhr3020afaa.step` / `lhr3020afaa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Legendsemi datasheet](docs/lhr3020afaa-datasheet.pdf) (14 pp, sha256 `a5ef983cd4f79fdb`, retrieved 2026-10-27, 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-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/lhr3020afaa-datasheet.pdf)