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lm2596mdt-12

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by Ray

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

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LM2596MDT-12

HGSEMI · DC-DC Converters · TO-252-4

LM2596MDT-12 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 Unregulated DC power supply input. Operating range 4.5 V to 40 V (LM2596) or 4.5 V to 60 V (LM2596HV). Bypass to GND with a large-value input capacitor placed close to the pin to suppress supply noise and provide the switching current pulses.
2 OUTPUT output Switching node - internal power transistor emitter/drain. Connects to the external step-down inductor and the cathode of the catch (Schottky) diode. Saturation voltage typically 1.3 V (max 1.5 V) at ILOAD = 3 A. Absolute-max voltage range -0.3 V to VIN.
3 GND power_in Device ground return and heat-sinking tab reference. Must be routed on the output-side ground path (returning through the catch diode) rather than the switching-current side to keep the analog reference quiet from switching-current transients.
4 FEEDBACK input Voltage feedback sense input. For the fixed 12 V version this pin is tied directly to the regulated output - the internal divider sets the 12 V regulation (11.52 V / 12 V / 12.48 V min/typ/max). Internal reference threshold is 1.23 V. Absolute-max voltage range -0.3 V to VIN.
5 ON_OFF input Active-low enable / shutdown control input with hysteresis. Pull LOW (< 0.8 V) or leave floating to enable the regulator; drive HIGH (> 1.4 V) to shut the part down. Leakage 5 uA typ (max 30 uA) at 2.5 V (OFF); 0.2 uA typ (max 10 uA) at 0.5 V (ON). Absolute-max voltage range -0.3 V to VIN.

Key specifications

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

Ordering variants

  • LM2596MDT-12/TR
  • LM2596MDT-12LM2596MDT-3.3/TR
  • LM2596MDT-12LM2596MDT-5.0/TR
  • LM2596MDT-12LM2596MDT-15/TR
  • LM2596MDT-12LM2596MDT-ADJ/TR
  • LM2596MDT-12LM2596MD5T-12/TR
  • LM2596MDT-12LM2596MD5T-3.3/TR
  • LM2596MDT-12LM2596MD5T-5.0/TR
  • LM2596MDT-12LM2596MD5T-15/TR
  • LM2596MDT-12LM2596MD5T-ADJ/TR
  • LM2596MDT-12LM2596S-12/TR
  • LM2596MDT-12LM2596S-3.3/TR
  • LM2596MDT-12LM2596S-5.0/TR
  • LM2596MDT-12LM2596S-15/TR
  • LM2596MDT-12LM2596S-ADJ/TR
  • LM2596MDT-12LM2596HVS-12/TR
  • LM2596MDT-12LM2596HVS-3.3/TR
  • LM2596MDT-12LM2596HVS-5.0/TR
  • LM2596MDT-12LM2596HVS-15/TR
  • LM2596MDT-12LM2596HVS-ADJ/TR
  • LM2596MDT-12LM2596T-12
  • LM2596MDT-12LM2596T-3.3
  • LM2596MDT-12LM2596T-5.0
  • LM2596MDT-12LM2596T-15
  • LM2596MDT-12LM2596T-ADJ
  • LM2596MDT-12LM2596HVT-12
  • LM2596MDT-12LM2596HVT-3.3
  • LM2596MDT-12LM2596HVT-5.0
  • LM2596MDT-12LM2596HVT-15
  • LM2596MDT-12LM2596HVT-ADJ
  • LM2596MDT-12LM2596TB-12
  • LM2596MDT-12LM2596TB-3.3
  • LM2596MDT-12LM2596TB-5.0
  • LM2596MDT-12LM2596TB-15
  • LM2596MDT-12LM2596TB-ADJ
  • LM2596MDT-12LM2596HVTB-12
  • LM2596MDT-12LM2596HVTB-3.3
  • LM2596MDT-12LM2596HVTB-5.0
  • LM2596MDT-12LM2596HVTB-15
  • LM2596MDT-12LM2596HVTB-ADJ
  • LM2596MDT-12LM2596M-12/TR
  • LM2596MDT-12LM2596M-3.3/TR
  • LM2596MDT-12LM2596M-5.0/TR
  • LM2596MDT-12LM2596M-15/TR
  • LM2596MDT-12LM2596M-ADJ/TR
  • LM2596MDT-12LM2596ME-12/TR
  • LM2596MDT-12LM2596ME-3.3/TR
  • LM2596MDT-12LM2596ME-5.0/TR
  • LM2596MDT-12LM2596ME-15/TR
  • LM2596MDT-12LM2596ME-ADJ/TR
  • LM2596MDT-12LM2596DQ4-12/TR
  • LM2596MDT-12LM2596DQ4-3.3/TR
  • LM2596MDT-12LM2596DQ4-5.0/TR
  • LM2596MDT-12LM2596DQ4-15/TR
  • LM2596MDT-12LM2596DQ4-ADJ/TR

CAD (KiCad official)

  • Symbol: LM2596MDT-12
  • 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 (None 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

Symbol & Footprint

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