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CM1802B28

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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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CM1802B28

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

CM1802B28 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.
2 VOUT power_out Regulated 2.8 V output (±2% accuracy) that delivers up to 500 mA, with VOUT to GND absolute maximum of -0.3 to 5 V.
3 VIN power_in Input supply pin with an operating range of 1.8 V to 6.5 V, and an absolute maximum of -0.3 to 6.5 V to GND.

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 VIN 1.8 6.5 V 6
Output voltage accuracy (VOUT, 2.8V option) VOUT -2 2 % VIN=5.5V, IOUT=10mA 6
Absolute max VIN to GND VIN -0.3 6.5 V 5
Absolute max VOUT to GND VOUT -0.3 5 V 5
Absolute max VIN to VOUT 0.3 5 V 5
Operating ambient temperature -40 85 ℃ 5
Storage temperature -40 150 ℃ 5
Operating junction temperature 150 ℃ 5
ESD HBM 2 kV Human body model 5
Thermal resistance junction-to-ambient, SOT23-3 380 ℃/W SOT23-3 package 5
Output voltage (selection table) VOUT 2.8 V CM1802X28 fixed output option 1
Quiescent current IGND IGND 40 µA VIN=5.5V, no load 6
Output current IOUT_MAX IOUT_MAX 500 mA 6
Dropout voltage VDROP (10mA) VDROP 20 mV IOUT=10mA, ΔVOUT=-0.1V 6
Dropout voltage VDROP (100mA) VDROP 110 mV IOUT=100mA, ΔVOUT=-0.1 6
Load regulation ΔVOUT ΔVOUT 0.2 % 1mA≤IOUT≤300mA 6
Line regulation ΔVOUT/ΔVIN ΔVOUT/ΔVIN 0.1 mV/V IOUT=1mA, VIN=(VOUTNOM+1V) to 6V 6
Current limit ILIMIT ILIMIT 500 mA 6
Power supply rejection ratio PSRR PSRR 65 dB f=10kHz, COUT=1uF, IOUT=30mA 6
Over-temperature protection TSHDN TSHDN 155 ℃ 6
Over-temperature recovery TSHDNR TSHDNR 135 ℃ 6

CAD (KiCad official)

  • Symbol: CM1802B28
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: cm1802b28-etched.step / cm1802b28-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cm1802b28.step / cm1802b28.glb are the bare package body.

Provenance

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

  • Datasheet: iCM(创芯微) datasheet (17 pp, sha256 f0186af81e472d6d, 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