component
CM1802B33
Public Made by Adomby adom
iCM(创芯微) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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CM1802B33
iCM(创芯微) · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3
CM1802B33 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 (地) for the regulator; the SOT23-3 variant has no EN pin, so the EN shutdown described in the features does not apply to this package. |
| 2 | VOUT | power_out | Regulated output (输出) at the fixed 3.3V for CM1802B33, with a maximum output current of 500mA and ±2% output accuracy. |
| 3 | VIN | power_in | Input supply (输入); the features list 2.5 to 6V and the electrical table lists 1.8 to 6.5V, with an absolute maximum VIN-to-GND 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 | ||
| Output voltage accuracy | VOUT | -2 | 2 | % | VIN=5.5V, IOUT=10mA | 6 | |
| Absolute maximum VIN to GND | VIN | -0.3 | 6.5 | V | VIN to GND withstand voltage | 5 | |
| Absolute maximum VOUT to GND | VOUT | -0.3 | 5 | V | VOUT to GND withstand voltage | 5 | |
| Absolute maximum VIN to VOUT | 0.3 | 5 | V | VIN to VOUT withstand voltage | 5 | ||
| Operating ambient temperature | Ta | -40 | 85 | ℃ | 工作环境温度 | 5 | |
| Storage temperature | Tstg | -40 | 150 | ℃ | 存储温度 | 5 | |
| Operating junction temperature | Tj | 150 | ℃ | 工作结温 | 5 | ||
| Human body model ESD | HBM | 2 | kV | Human body model | 5 | ||
| Thermal resistance, SOT23-3 | 380 | ℃/W | 热阻SOT23-3 | 5 | |||
| Quiescent current | IGND | 40 | µA | VIN=5.5V, no load | 6 | ||
| Maximum 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 | PSRR | 65 | dB | f=10kHz, COUT=1uF, IOUT=30mA | 6 | ||
| Overtemperature protection threshold | TSHDN | 155 | ℃ | 6 | |||
| Overtemperature recovery threshold | TSHDNR | 135 | ℃ | 6 | |||
| Input capacitor (external, application) | Cin | 1 | 1 | 10 | µF | Typical application table, external component | 2 |
| Output capacitor (external, application) | Cout | 1 | 10 | 10 | µF | Typical application table, external component | 2 |
CAD (KiCad official)
- Symbol:
CM1802B33 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
cm1802b33-etched.step/cm1802b33-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cm1802b33.step/cm1802b33.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: iCM(创芯微) datasheet (17 pp, sha256
d4c1e448602af278, retrieved 2026-11-07, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).
# CM1802B33
**iCM(创芯微)** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3
CM1802B33 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 (地) for the regulator; the SOT23-3 variant has no EN pin, so the EN shutdown described in the features does not apply to this package. |
| 2 | VOUT | power_out | Regulated output (输出) at the fixed 3.3V for CM1802B33, with a maximum output current of 500mA and ±2% output accuracy. |
| 3 | VIN | power_in | Input supply (输入); the features list 2.5 to 6V and the electrical table lists 1.8 to 6.5V, with an absolute maximum VIN-to-GND 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 |
| Output voltage accuracy | VOUT | -2 | | 2 | % | VIN=5.5V, IOUT=10mA | 6 |
| Absolute maximum VIN to GND | VIN | -0.3 | | 6.5 | V | VIN to GND withstand voltage | 5 |
| Absolute maximum VOUT to GND | VOUT | -0.3 | | 5 | V | VOUT to GND withstand voltage | 5 |
| Absolute maximum VIN to VOUT | | 0.3 | | 5 | V | VIN to VOUT withstand voltage | 5 |
| Operating ambient temperature | Ta | -40 | | 85 | ℃ | 工作环境温度 | 5 |
| Storage temperature | Tstg | -40 | | 150 | ℃ | 存储温度 | 5 |
| Operating junction temperature | Tj | | | 150 | ℃ | 工作结温 | 5 |
| Human body model ESD | HBM | | | 2 | kV | Human body model | 5 |
| Thermal resistance, SOT23-3 | | | 380 | | ℃/W | 热阻SOT23-3 | 5 |
| Quiescent current | IGND | | 40 | | µA | VIN=5.5V, no load | 6 |
| Maximum 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 | PSRR | | 65 | | dB | f=10kHz, COUT=1uF, IOUT=30mA | 6 |
| Overtemperature protection threshold | TSHDN | | 155 | | ℃ | | 6 |
| Overtemperature recovery threshold | TSHDNR | | 135 | | ℃ | | 6 |
| Input capacitor (external, application) | Cin | 1 | 1 | 10 | µF | Typical application table, external component | 2 |
| Output capacitor (external, application) | Cout | 1 | 10 | 10 | µF | Typical application table, external component | 2 |
## CAD (KiCad official)
- Symbol: `CM1802B33`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `cm1802b33-etched.step` / `cm1802b33-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cm1802b33.step` / `cm1802b33.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/8603386737649598464) (17 pp, sha256 `d4c1e448602af278`, retrieved 2026-11-07, 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/cm1802b33-datasheet.pdf)