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MST5433BTE

Public Unreviewed

by Ray

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

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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MST5433BTE

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

MST5433BTE from MST, in a SOT-23. 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 GND power_in Ground reference pin. Connect to system ground with a wide, low-impedance copper trace.
2 VOUT power_out Regulated LDO output pin (3.3V nominal for MST5433). Rated 300mA min / 350mA typical output current with ±2% accuracy. Requires a minimum 1uF ceramic (X5R/X7R) output capacitor placed close to the pin for stability.
3 VIN power_in Input supply pin. Operating range 3V to 45V (55V absolute max to GND). A 1uF ceramic decoupling capacitor to GND is recommended close to the pin. Note: on this SOT23-3 variant the EN function is internally tied high; there is no external EN pin.

Key specifications

Parameter Value
Manufacturer MST
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • MST5433BTE
  • MST5433BTE-A
  • MST5433BTE-B
  • MST5433BTE-C
  • MST5433BTEBTS
  • MST5433BTEBTS-A
  • MST5433BTEBTS-B
  • MST5433BTEBTS-C
  • MST5433BTEBTG

CAD (KiCad official)

  • Symbol: MST5433BTE
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
mst5433bte.step 59 KB You want the bare part, or you mark your own boards.
mst5433bte-etched.step 1.9 MB You want the part with MST5433BTE already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 465 faces against 69 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: MST datasheet (11 pp, sha256 35fdc1b6e0a00dc6, 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