# LHR3050AFAA

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

LHR3050AFAA 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 (DNC). |
| 2 | VIN | power_in | Supply voltage input; VIN must be at least VOUT + 0.2V and no more than 18V, with a 2.7V minimum for VOUT of 2.5V or less. |
| 3 | TEMP | output | Temperature monitor output with high output impedance, giving VTEMP = 668mV + 1.91mV/°C × T (accuracy about ±15°C), so low-impedance loads must be buffered. |
| 4 | GND | power_in | Ground reference pin; the output capacitor (1μF to 50μF) must be connected from VOUT to GND. |
| 5 | NC | unconnected | No internal connection (NC). |
| 6 | VOUT | output | Voltage reference output, rated for ±10mA source and sink current, requiring a 1μF to 50μF output capacitor to GND. |
| 7 | DNC | unconnected | Do not connect this pin (DNC). |
| 8 | DNC | unconnected | Do not connect this pin (DNC). |

## 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 |
|---|---|---|---|---|---|---|---|
| 初始精度：高等级 |  | -0.05 |  | 0.05 | % | 所有电压选项（1） | 5 |
| 输出电压温漂 高等级 | δVOUT/dT |  | 1 | 3 | ppm/°C | 高等级 | 5 |
| 线性调整率 | δVO(δVI) |  | 0.1 | 1 | ppm/V | VIN = (VOUT + 0.2) 至 18V（2） | 5 |
| 线性调整率 TA=-40°C 至 125°C | δVO(δVI) |  | 0.2 | 1 | ppm/V | VIN = VOUT + 0.2V， TA = -40°C 至 125°C（2） | 5 |
| 负载调整率 | δVO(δIL) |  | 20 | 30 | ppm/mA | -10mA < ILOAD < 10mA， VIN = VOUT + 0.75V（3） | 5 |
| 负载调整率 TA=-40°C 至 125°C | δVO(δIL) |  |  | 50 | ppm/mA | -10mA < ILOAD < 10mA， VIN = VOUT + 0.75V TA = -40°C 至 125°C（3） | 6 |
| 热迟滞 高等级 SOP-8 周期 1 | VHYST |  |  | 70 | ppm | 高等级 SOP-8 周期 1 | 6 |
| 热迟滞 高等级 SOP-8 周期 2 | VHYST |  |  | 50 | ppm | 高等级 SOP-8 周期 2 | 6 |
| 长期稳定性 SOP-8 0 到 1000 小时 | LTD |  |  | 100 | ppm/1000 小时 | SOP-8 0 到 1000 小时 | 6 |
| 长期稳定性 SOP-8 1000 到 2000 小时 | LTD |  |  | 50 | ppm/1000 小时 | SOP-8 1000 到 2000 小时 | 6 |
| 电源电压 | Vs |  |  | 18 | V | 请参阅注释 | 6 |
| 静态电流 | IQ |  | 0.8 | 1 | mA |  | 6 |
| 静态电流 TA=-40°C 至 125°C | IQ |  |  | 1.2 | mA | TA = -40°C 至 125°C | 6 |
| 输入电压 | VIN | -0.2 |  | 18 | V |  | 4 |
| 输出对地短路 |  | 0 |  | 30 | mA |  | 4 |
| 输出电压范围 |  | -0.2 |  | 5.5 | V |  | 4 |
| 工作温度 |  | -55 |  | 125 | °C |  | 4 |
| 结温（TJ 最大值） | TJ |  |  | 150 | °C |  | 4 |
| 贮存温度 | Tstg | -65 |  | 150 | °C |  | 4 |
| 输入电压（推荐） | VIN |  |  | 18 | V |  | 5 |
| 输出电流（推荐） | IOUT | -10 |  | 10 | mA |  | 5 |
| 短路电流 | ISC |  | 25 |  | mA | VOUT = 0 | 6 |
| 输出电压 | VOUT |  | 5 |  | V | 2.7V<VIN<18V | 5 |
| 输出电压噪声 |  |  | 1.5 |  | µVPP/V | F=0.1Hz 至 10Hz | 5 |
| TEMP 引脚电压输出 |  |  | 668 |  | mV | 在 TA=25°C 时 | 6 |
| TEMP 引脚温度敏感性 |  |  | 1.91 |  | mV/°C | TA = -40°C 至 125°C | 6 |
| 结至环境热阻 RθJA (SOP) | RθJA |  | 160.9 |  | °C/W | DGK (SOP) 8 引脚 | 5 |
| 结至外壳（顶部）热阻 RθJC(top) (SOP) | RθJC(top) |  | 53.9 |  | °C/W | DGK (SOP) 8 引脚 | 5 |
| 结至电路板热阻 RθJB (SOP) | RθJB |  | 82.3 |  | °C/W | DGK (SOP) 8 引脚 | 5 |
| 结至顶部特征参数 ψJT (SOP) | ψJT |  | 5.1 |  | °C/W | DGK (SOP) 8 引脚 | 5 |
| 结至电路板特征参数 ψJB (SOP) | ψJB |  | 80.7 |  | °C/W | DGK (SOP) 8 引脚 | 5 |

## CAD (KiCad official)

- Symbol: `LHR3050AFAA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lhr3050afaa-etched.step` / `lhr3050afaa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lhr3050afaa.step` / `lhr3050afaa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Legendsemi datasheet](docs/lhr3050afaa-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 `off` (skipped (clean text read)), 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/lhr3050afaa-datasheet.pdf)