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LM2596MDT-3.3

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by Ray

HGSEMI DC-DC Converters, TO-252-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiclm2596mdt-3.3
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Datasheet

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Contents

README

markdown

LM2596MDT-3.3

HGSEMI · DC-DC Converters · TO-252-4

LM2596MDT-3.3 from HGSEMI, in a TO-252-4. 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 Power supply input pin. Accepts 4.5 V to 40 V DC (60 V on HV variants). Bypass to GND with a large-value capacitor close to the pin to suppress input noise.
2 OUTPUT output Power switch output pin. This is the switching node of the internal power transistor; connects to the external inductor and catch diode to supply the load.
3 GND power_in Ground pin. Must be routed with a short, low-impedance connection to the catch diode's output-referenced node to suppress switching current noise. The exposed metal tab is also tied to GND.
4 FEEDBACK input Voltage feedback pin. For the fixed 3.3 V version, connect directly to the regulated output for internal sensing. Internal reference is 1.23 V (used on the ADJ version via an external resistor divider).
5 ON_OFF input Enable/shutdown input. Pull low (or leave floating; internally defaults low) for normal operation; drive high (>1.4 V) to shut down the regulator. Threshold approx 0.8 V (low)/1.4 V (high).

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-252-4
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LM2596MDT-3.3/TR
  • LM2596T-3.3
  • LM2596HVT-3.3
  • LM2596S-3.3/TR
  • LM2596HVS-3.3/TR
  • LM2596MD5T-3.3/TR
  • LM2596TB-3.3
  • LM2596HVTB-3.3
  • LM2596M-3.3/TR
  • LM2596ME-3.3/TR
  • LM2596DQ4-3.3/TR

CAD (KiCad official)

  • Symbol: LM2596MDT-3.3
  • Footprint: Package_TO_SOT_SMD:TO-252-4
  • 3D model: TO-252-4 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: HGSEMI datasheet (17 pp, sha256 986b3081cc1a4676, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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