# LHR3050AFMA

**Legendsemi** · Voltage Reference · MSOP-8

LHR3050AFMA from Legendsemi, in a MSOP-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; leave this pin unconnected. |
| 2 | VIN | power_in | Supply voltage input, VOUT + 0.2V minimum (2.7V minimum for VOUT above 2.5V per datasheet note) to 18V maximum, with a 1µF to 10µF bypass capacitor recommended close to the pin. |
| 3 | TEMP | output | Temperature monitor pin giving a voltage of 692mV typical at 25°C with 2.08mV/°C sensitivity; high output impedance, so buffer it, and it does not affect VOUT accuracy. |
| 4 | GND | power_in | Ground. |
| 5 | NC | unconnected | No internal connection. |
| 6 | VOUT | power_out | Reference voltage output of 5.0V for LHR3050, sources and sinks up to ±10mA, and needs a 1µF to 50µF output capacitor to GND. |
| 7 | DNC | unconnected | Do not connect; leave this pin unconnected. |
| 8 | DNC | unconnected | Do not connect; leave this pin unconnected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Legendsemi |
| Package | MSOP-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 |
|---|---|---|---|---|---|---|---|
| Output voltage | VOUT |  | 5 |  | V | LHR3050, 2.7V<VIN<18V | 5 |
| Initial accuracy, high grade |  | -0.05 |  | 0.05 | % | High grade, all voltage options | 5 |
| Output voltage temperature drift, high grade MSOP-8 | δVOUT/dT |  | 1 | 5 | ppm/°C | High grade (MSOP-8) | 5 |
| Line regulation | δVO(δVI) |  | 0.7 | 1 | ppm/V | VIN = (VOUT + 0.2) to 18V | 5 |
| Line regulation over temperature | δVO(δVI) |  |  | 1 | ppm/V | VIN = VOUT + 0.2V, TA = -40°C to 125°C | 5 |
| Load regulation | δVO(δIL) |  | 20 | 30 | ppm/mA | -10mA < ILOAD < 10mA, VIN = VOUT + 0.75V | 5 |
| Load regulation over temperature | δVO(δIL) |  |  | 50 | ppm/mA | -10mA < ILOAD < 10mA, VIN = VOUT + 0.75V, TA = -40°C to 125°C | 5 |
| Quiescent current |  |  | 0.8 | 1 | mA |  | 6 |
| Quiescent current over temperature |  |  |  | 1.2 | mA | TA = -40°C to 125°C | 6 |
| Supply voltage | Vs |  |  | 18 | V | Min VOUT + 0.2 | 6 |
| Specified temperature range |  | -40 |  | 125 | °C |  | 6 |
| Operating temperature range |  | -55 |  | 125 | °C |  | 6 |
| Input voltage (absolute maximum) |  | -0.2 |  | 18 | V |  | 4 |
| Output short circuit to ground (absolute maximum) |  | 0 |  | 70 | mA |  | 4 |
| Operating temperature (absolute maximum) |  | -55 |  | 125 | °C |  | 4 |
| Junction temperature | TJ max |  |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| ESD HBM | V(ESD) | -3000 |  | 3000 | V | ANSI/ESDA/JEDEC JS-001 | 4 |
| ESD CDM | V(ESD) | -1000 |  | 1000 | V | JEDEC JESD22-C101 | 4 |
| Input voltage (recommended) | VIN |  |  | 18 | V | Min VOUT + 0.2V | 5 |
| Output current (recommended) | IOUT | -10 |  | 10 | mA |  | 5 |
| Junction-to-ambient thermal resistance, MSOP | RθJA |  | 115 |  | °C/W | 8-pin MSOP | 5 |
| Junction-to-case (top) thermal resistance, MSOP | RθJC(top) |  | 63.4 |  | °C/W | 8-pin MSOP | 5 |
| Junction-to-board thermal resistance, MSOP | RθJB |  | 57.1 |  | °C/W | 8-pin MSOP | 5 |
| Junction-to-top characterization parameter, MSOP | ψJT |  | 15.4 |  | °C/W | 8-pin MSOP | 5 |
| Junction-to-board characterization parameter, MSOP | ψJB |  | 56.2 |  | °C/W | 8-pin MSOP | 5 |
| Output voltage noise |  |  | 1.5 |  | µVPP/V | F=0.1Hz to 10Hz | 5 |
| Short-circuit current | ISC |  | 60 |  | mA | VOUT = 0 | 5 |
| Thermal hysteresis, high grade MSOP-8, cycle 1 |  |  | 90 |  | ppm | High grade MSOP-8 cycle 1 | 5 |
| Thermal hysteresis, high grade MSOP-8, cycle 2 |  |  | 60 |  | ppm | High grade MSOP-8 cycle 2 | 6 |
| Long-term stability, MSOP-8, 0 to 1000 h |  |  | 50 |  | ppm/1000 h | MSOP-8 0 到 1000 小时 | 6 |
| Long-term stability, MSOP-8, 1000 to 2000 h |  |  | 25 |  | ppm/1000 h | MSOP-8 1000 到 2000 小时 | 6 |
| TEMP pin output voltage |  |  | 692 |  | mV | TA=25°C | 6 |
| TEMP pin temperature sensitivity |  |  | 2.08 |  | mV/°C | TA = -40°C to 125°C | 6 |

## CAD (KiCad official)

- Symbol: `LHR3050AFMA`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `lhr3050afma-etched.step` / `lhr3050afma-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lhr3050afma.step` / `lhr3050afma.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Legendsemi datasheet](docs/lhr3050afma-datasheet.pdf) (14 pp, sha256 `ff3d9553c635cfa9`, retrieved 2026-10-23, 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), 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/lhr3050afma-datasheet.pdf)