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CM1842B33
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCM1842B33
iCM(创芯微) · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3
CM1842B33 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 (地); it is pin 1 on the SOT23-3 variant. |
| 2 | VOUT | power_out | Regulated 3.3 V output; absolute maximum VOUT-to-GND is -0.3 V to 7 V, and output current is rated up to 300 mA (350 mA typical max limit per the table). |
| 3 | VIN | power_in | Input supply; the input voltage range is 3 V to 45 V, with absolute maximum VIN-to-GND of -0.3 V to 50 V. |
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 |
|---|---|---|---|---|---|---|---|
| 输入电压 | VIN | 3 | 45 | V | 5 | ||
| 输出电压 | VOUT | -2 | 2 | % | VIN=12V, IOUT=10mA | 5 | |
| 输出电流 | IOUT_MAX | 300 | 350 | mA | 5 | ||
| 输入输出压差 | VDROP | 35 | mV | IOUT=10mA, ΔVOUT=-0.1V | 5 | ||
| 输入输出压差 | VDROP | 350 | mV | IOUT=100mA, ΔVOUT=-0.1 | 5 | ||
| 负载调整率 | ΔVOUT | 0.1 | mV/mA | 1mA≤IOUT≤100mA | 5 | ||
| 线性调整率 | ΔVOUT100/ΔVINVOUT | 0.1 | mV/V | IOUT=1mA, VIN=(VOUTNOM+0.5V) to 42V | 5 | ||
| 电源抑制比 | PSRR | 70 | dB | IOUT=10mA, f=1KHz | 5 | ||
| 限流保护 | ILIMIT | 500 | mA | 5 | |||
| 过温保护 | TSHDN | 145 | ℃ | 5 | |||
| 过温恢复 | TSHDNR | 125 | ℃ | 5 | |||
| VIN到地耐压 | -0.3 | 50 | V | 4 | |||
| VOUT到地耐压 | -0.3 | 7 | V | 4 | |||
| VOUT到VIN耐压 | -50 | 0.3 | V | 4 | |||
| 工作环境温度 | -40 | 85 | ℃ | 4 | |||
| 存储温度 | -40 | 150 | ℃ | 4 | |||
| 工作结温 | 150 | ℃ | 4 | ||||
| 热阻 SOT23-3 | 250 | ℃/W | 4 |
CAD (KiCad official)
- Symbol:
CM1842B33 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
cm1842b33-etched.step/cm1842b33-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cm1842b33.step/cm1842b33.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: iCM(创芯微) datasheet (14 pp, sha256
528af0d27dbbd15b, 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, 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).