component

SPX3940AM3-L-3-3

Public Made by Adom

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MaxLinear Linear Voltage Regulators (LDO), SOT-223-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsspx3940am3-l-3-3factory-2.0.0extractor-text

Verified SPX3940AM3-L-3-3

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SPX3940AM3-L-3-3 · SOT-223-3 · 3 pins
  • ✓copper: 4 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 11-page datasheet
  • ✓distributor: lcsc C48252, digikey 1016-1557-5-ND, mouser 701-SPX3940AM3-L-3-3
  • ✓family: SOT-223-3_TabPin2
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-r6hsu5kn/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ spx3940am3-l-3-3.kicad_sym✓ spx3940am3-l-3-3.kicad_mod✓ spx3940am3-l-3-3.step
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spx3940am3-l-3-3 / README.md
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Ray Publish 0.1.0 ee2bbcc 3d ago

SPX3940AM3-L-3-3

MaxLinear · Linear Voltage Regulators (LDO) · SOT-223-3

SPX3940AM3-L-3-3 from MaxLinear, in a SOT-223-3. 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 VIN power_in Regulator input supply; operating maximum 16V continuous, 20V absolute maximum for <100ms and <1% duty cycle.
2 GND power_in Ground pin; the tab is also connected to GND.
3 VOUT power_out Regulated 3.3V output (1% accuracy, 3.267V to 3.333V at 25°C), needs at least 10µF output capacitor for stability and 5mA minimum load.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SOT-223-3
Category Power Management ICs
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
Output Voltage - SPX3940A (1%), 3.3V version 3.267 3.3 3.333 V IOUT=10mA 2
Output Voltage - SPX3940A (1%), 3.3V version, full range 3.217 3.3 3.383 V 10mA≤IOUT≤1A, 6V≤VIN≤16V 2
Line Regulation 0.2 1 % IOUT=10mA, (VOUT +1V)≤VIN≤16V 2
Load Regulation 0.3 1.5 % VIN = VOUT +1V, 10mA≤IOUT≤1A 2
Output Voltage Temperature Coefficient 20 100 ppm/°C 2
Dropout Voltage (except 1.8V version) 70 200 mV IOUT=100mA 2
Dropout Voltage (except 1.8V version) 280 550 mV IOUT=1A 2
Ground Current 12 25 mA IOUT=750mA, VIN = VOUT +1V 2
Current Limit 1.5 2.2 A VOUT = 0V 2
Input Voltage (absolute maximum) VIN 20 V Limited duration <100ms, duty cycle <1% (Note 1) 2
Storage Temperature -65 150 °C 2
Lead Temperature (Soldering) 260 °C Soldering, 5 sec 2
Input Voltage (operating, continuous) VIN 16 V 2
Junction Temperature Range -40 125 °C 2
SOT-223 Junction to Case (at TA) thermal resistance 15 °C/W 2

CAD (KiCad official)

  • Symbol: SPX3940AM3-L-3-3
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223-3 (KiCad packages3D, STEP)
  • 3D model files: spx3940am3-l-3-3-etched.step / spx3940am3-l-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); spx3940am3-l-3-3.step / spx3940am3-l-3-3.glb are the bare package body.

Provenance

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

  • Datasheet: MaxLinear datasheet (11 pp, sha256 5002018d49c62ac5, retrieved 2026-11-05, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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