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SPX3819M5-L-3-3

Public Unreviewed

by Ray

MaxLinear Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

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SPX3819M5-L-3-3

MaxLinear · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

SPX3819M5-L-3-3 from MaxLinear, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Supply input. Operating range 2.5V to 16V (absolute max -20V to +20V). Should be decoupled with a 1µF ceramic capacitor to GND near the pin. Powers the regulator pass element and internal reference.
2 GND power_in Ground return for the regulator. Also the reference for output feedback and enable thresholds. Ground pin current is typically 90µA at 100µA load and ~6.5mA at 500mA load.
3 EN input Enable input, CMOS-compatible. Logic high (VIH ≥ 2.0V) enables the regulator; logic low (VIL ≤ 0.4V) or open shuts it down (near-zero quiescent current). Absolute-max input range -20V to +20V; recommended 0V to VIN. May be tied directly to VIN for always-on operation.
4 BYP passive Reference bypass pin (fixed-voltage variants such as this -3-3 option). Connect an optional 1nF-10nF ceramic capacitor from BYP to GND to reduce output noise to ~40µV RMS (10Hz-100kHz). Leave floating if low-noise operation is not required. On adjustable variants this pin functions as ADJ (feedback from an external divider); the -3-3 3.3V fixed part uses it as BYP only.
5 VOUT power_out Regulator output, 3.3V fixed, up to 500mA. Requires a minimum 1µF ceramic output capacitor to GND for stability. Dropout is typically 340mV at 500mA.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • SPX3819M5-L-3-3
  • SPX3819M5-L-3-3/TR
  • SPX3819R2-L
  • SPX3819S-L
  • SPX3819S-L-3-3

The extractor listed these alongside SPX3819M5-L-3-3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • SPX3819R2-L-1-2
  • SPX3819R2-L-1-8
  • SPX3819S-L-1-2
  • SPX3819S-L-1-5
  • SPX3819S-L-1-8
  • SPX3819S-L-2-5
  • SPX3819S-L-5-0

CAD (KiCad official)

  • Symbol: SPX3819M5-L-3-3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
spx3819m5-l-3-3.step 85 KB You want the bare part, or you mark your own boards.
spx3819m5-l-3-3-etched.step 2.6 MB You want the part with SPX3819M5-L-3-3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 626 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: MaxLinear datasheet (12 pp, sha256 f2808357a4016e81, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF