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CM1821A33

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iCM(创芯微) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CM1821A33

iCM(创芯微) · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

CM1821A33 from iCM(创芯微), in a SOT-89-3. 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) for the regulator.
2 VIN power_in Input supply pin; VIN-to-GND withstand is -0.3 V to 30 V, and the device accepts input voltages up to 30 V.
3 VOUT power_out Regulated output pin, rated for up to 150 mA output current; VOUT-to-GND withstand is -0.3 V to 6 V.

Key specifications

Parameter Value
Manufacturer iCM(创芯微)
Package SOT-89-3
Category Power Management (PMIC)
Pins 3

CAD (KiCad official)

  • Symbol: CM1821A33
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: cm1821a33-etched.step / cm1821a33-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cm1821a33.step / cm1821a33.glb are the bare package body.

Provenance

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

  • Datasheet: iCM(创芯微) datasheet (10 pp, sha256 39239e8ca9e092c6, retrieved 2026-10-20, 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