# CM1802B30

**iCM(创芯微)** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3

CM1802B30 from iCM(创芯微), in a SOT-23-3. 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 | GND | power_in | Ground reference pin for the regulator; the datasheet gives no separate electrical limit for this pin beyond the absolute maximum ratings for the other pins. |
| 2 | VOUT | power_out | Regulated 3.0V output for the CM1802B30 option, rated for up to 500mA, with an absolute-maximum VOUT-to-GND voltage of -0.3 to 5V. |
| 3 | VIN | power_in | Input supply pin with an operating input voltage of 1.8 to 6.5V per the electrical characteristics table and an absolute-maximum VIN-to-GND voltage of -0.3 to 6.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | iCM(创芯微) |
| Package | SOT-23-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | 1.8 |  | 6.5 | V |  | 6 |
| Quiescent current | IGND |  | 40 |  | µA | VIN=5.5V，空载 | 6 |
| Output voltage accuracy (3.0V variant) | VOUT | -2 |  | 2 | % | VIN=5.5V，IOUT=10mA | 6 |
| Output current | IOUT_MAX |  | 500 |  | mA |  | 6 |
| Dropout voltage | VDROP |  | 20 |  | mV | IOUT=10mA，ΔVOUT=-0.1V | 6 |
| Dropout voltage | VDROP |  | 110 |  | mV | IOUT=100mA，ΔVOUT=-0.1 | 6 |
| Load regulation | ΔVOUT |  | 0.2 |  | % | 1mA≤IOUT≤300mA | 6 |
| Line regulation | ΔVOUT/ΔVIN |  | 0.1 |  | mV/V | IOUT=1mA，VIN=(VOUTNOM+1V) to 6V | 6 |
| Current limit | ILIMIT |  | 500 |  | mA |  | 6 |
| Power supply rejection ratio |  |  | 65 |  | dB | f=10kHz, COUT=1uF, IOUT=30mA | 6 |
| Over-temperature protection threshold | TSHDN |  | 155 |  | ℃ |  | 6 |
| Over-temperature recovery threshold | TSHDNR |  | 135 |  | ℃ |  | 6 |
| VIN to GND withstand voltage |  | -0.3 |  | 6.5 | V |  | 5 |
| VOUT to GND withstand voltage |  | -0.3 |  | 5 | V |  | 5 |
| VIN to VOUT withstand voltage |  | 0.3 |  | 5 | V |  | 5 |
| Operating ambient temperature |  | -40 |  | 85 | ℃ |  | 5 |
| Storage temperature |  | -40 |  | 150 | ℃ |  | 5 |
| Operating junction temperature |  |  |  | 150 | ℃ |  | 5 |
| Human body model ESD | HBM |  |  | 2 | kV |  | 5 |
| Thermal resistance, SOT23-3 |  |  | 380 |  | ℃/W |  | 5 |
| Input voltage (recommended) | VIN | 2.5 |  | 6 | V |  | 1 |
| Input capacitor Cin (typical application) | Cin | 1 | 1 | 10 | µF |  | 2 |
| Output capacitor Cout (typical application) | Cout | 1 | 10 | 10 | µF |  | 2 |

## CAD (KiCad official)

- Symbol: `CM1802B30`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `cm1802b30-etched.step` / `cm1802b30-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cm1802b30.step` / `cm1802b30.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [iCM(创芯微) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603386738832257024) (17 pp, sha256 `705d32c0266022ed`, retrieved 2026-10-17, 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/cm1802b30-datasheet.pdf)