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KF33BDT-TR

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by Ray

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

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Datasheet

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Contents

README

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KF33BDT-TR

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DPAK

KF33BDT-TR from STMicroelectronics, in a DPAK. 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 Device ground reference. In DPAK this is the left lead and is electrically common with the exposed tab used as the primary heat-sinking surface.
2 OUTPUT power_out Regulated 3.3 V output (nominal 3.3 V, tolerance +/-2% at 25 degC; 3.234-3.366 V at Io = 50 mA). Supports up to 500 mA continuous with internal current limit around 1 A. Requires a >=2.2 uF (ESR 0.1-10 ohm) output capacitor for stability.
3 INPUT power_in Unregulated DC input supply, absolute maximum -0.5 V to 20 V. For 3.3 V operation Vi >= 4.3 V (Io = 0) or 4.6 V (Io = 500 mA) is required to stay out of dropout (Vd typ. 0.4 V at 500 mA). A 0.1 uF input bypass capacitor is recommended.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package DPAK
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • KF33BDT-TR
  • KF33BDT-TRBD-TR

CAD (KiCad official)

  • Symbol: KF33BDT-TR
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: DPAK (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (21 pp, sha256 a683c58723f09c6f, 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