# MSR025

**Hangzhou Ruimeng Tech** · Voltage References · SOT-23-5

MSR025 from Hangzhou Ruimeng Tech, in a SOT-23-5. 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 | NC | unconnected | No connection; left floating. |
| 2 | GND | power_in | Ground. |
| 3 | NC | unconnected | No connection; left floating. |
| 4 | VCC | power_in | Power supply input; MSR025 supply range is 2.65V to 5.5V (absolute maximum -0.3V to +6.5V). |
| 5 | REF | output | Reference voltage output; 2.5V for MSR025 (1.5V for MSR015), specified with CL=1μF. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hangzhou Ruimeng Tech |
| Package | SOT-23-5 |
| Category | Power Supply Chip |
| Pins | 5 |

## 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 | 2.49875 | 2.5 | 2.50125 | V | MSR025, CL=1μF, VCC=5V, TA=25°C | 4 |
| Accuracy |  | -0.05 |  | 0.05 | % | VCC=5V, TA=25°C | 4 |
| Supply voltage range | VCC | 2.65 |  | 5.5 | V | MSR025 | 4 |
| Supply current |  |  | 800 | 1000 | μA | MSR025, VCC=5V, TA=25°C | 4 |
| Output voltage temperature drift, grade A |  |  |  | 5 | ppm/°C | A grade, temperature range -40°C to 85°C | 4 |
| Output voltage temperature drift, grade B |  |  |  | 15 | ppm/°C | B grade, temperature range -40°C to 85°C | 4 |
| Output voltage temperature drift, grade C |  |  |  | 30 | ppm/°C | C grade, temperature range -40°C to 85°C | 4 |
| Output voltage temperature drift, grade D |  |  |  | 60 | ppm/°C | D grade, temperature range -40°C to 85°C | 4 |
| Power supply rejection ratio |  |  | -70 |  | dB | VCC=5V±0.5V | 4 |
| Output voltage noise |  |  | 20 |  | μVpp | f=0.1Hz to 10Hz | 4 |
| Output short-circuit current |  |  | 1 |  | mA |  | 4 |
| Startup time |  |  | 20 |  | ms | MSR025, external 10μF capacitor | 4 |
| Supply voltage | VCC | -0.3 |  | 6.5 | V |  | 3 |
| Supply voltage difference | VCC-GND | -0.3 |  | 6.5 | V |  | 3 |
| Operating temperature range | TA | -40 |  | 125 | °C |  | 3 |
| Storage temperature range | TSTG | -65 |  | 150 | °C |  | 3 |
| Maximum junction temperature | TJMAX |  |  | 150 | °C |  | 3 |
| Soldering temperature | TSOLDER |  |  | 260 | °C | 10s | 3 |
| ESD (HBM) | VESD |  |  | 4000 | V | HBM | 3 |
| Output voltage noise density |  |  | 0.3 |  | ppm/√Hz | f=1kHz | 4 |

## CAD (KiCad official)

- Symbol: `MSR025`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `msr025-etched.step` / `msr025-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msr025.step` / `msr025.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Hangzhou Ruimeng Tech datasheet](docs/msr025-datasheet.pdf) (10 pp, sha256 `bb783f9123c8b699`, 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/msr025-datasheet.pdf)