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SPX1587AT-L-3-3

Public Unreviewed

by Ray

MaxLinear Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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SPX1587AT-L-3-3

MaxLinear · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-3

SPX1587AT-L-3-3 from MaxLinear, in a TO-263-3. 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 ADJ/GND power_in Ground pin for the fixed-output version (SPX1587AT-3.3). Reference return for the internal 1.25V bandgap. On adjustable versions this pin is the ADJ feedback node instead. Tab is electrically connected to VOUT, not this pin.
2 VOUT power_out Regulated 3.3V output, 0 to 3A. Requires a stability capacitor to GND (10µF electrolytic or 4.7µF solid tantalum minimum; 22µF/10µF when ADJ pin is bypassed). Tab of TO-263 is electrically connected to this pin.
3 VIN power_in Unregulated input supply, 4.75V to 10V for the 3.3V fixed version. Maximum input voltage 10V; maximum input-to-output differential 8.8V. An input bypass capacitor is recommended.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package TO-263-3
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

The extractor listed these alongside SPX1587AT-L-3-3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • SPX1587AT-L-3-3AT-3.3
  • SPX1587AT-L-3-3T-3.3
  • SPX1587AT-L-3-3AU-3.3
  • SPX1587AT-L-3-3U-3.3
  • SPX1587AT-L-3-3AR-3.3
  • SPX1587AT-L-3-3R-3.3

CAD (KiCad official)

  • Symbol: SPX1587AT-L-3-3
  • Footprint: Package_TO_SOT_SMD:TO-263-2
  • 3D model: TO-263-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
spx1587at-l-3-3.step 108 KB You want the bare part, or you mark your own boards.
spx1587at-l-3-3-etched.step 2.1 MB You want the part with SPX1587AT-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: 545 faces against 79 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 (7 pp, sha256 22e31b3a069bec1b, retrieved 2026-08-17, tier: lcsc)
  • 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