component

LM2596S-ADJ

Public Unreviewed

by Ray

UMW DC-DC Converters, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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LM2596S-ADJ

UMW · DC-DC Converters · TO-263-5

LM2596S-ADJ from UMW, in a TO-263-5. 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 Input supply voltage. Operating range 4.75V to 40V (LM2596) / 4.75V to 60V (LM2596HV). Absolute maximum 45V (63V for HV). Bypass with a low-ESR input capacitor (typ. 680 µF).
2 Output output Switching output pin. Emitter of the internal NPN power switch; connects to the external catch diode (e.g. 1N5824) and to the inductor of the buck output filter (typ. 33 µH). Steady-state voltage rated down to -1V; peak switch current limit typ. 4.5A.
3 GND power_in Device ground. Common return for the input capacitor, output capacitor, catch diode, and feedback divider.
4 Feedback input Output voltage feedback input to the internal error amplifier. For the ADJ version, connect to the mid-point of an external resistor divider from VOUT; internal reference VFB = 1.23V (typ). Bias current 10 nA typ (100 nA max). Absolute max -0.3V to +25V.
5 ON/OFF input Active-low shutdown / enable input (bar over ON/OFF). Regulator is ON when the pin is Low (<0.6V) or left floating; regulator is OFF (standby, IQ typ 80 µA) when the pin is High (>2V). TTL-compatible; absolute max -0.3V to +25V.

Key specifications

Parameter Value
Manufacturer UMW
Package TO-263-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LM2596S-ADJ

The extractor listed these alongside LM2596S-ADJ, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LM2596HVS-ADJ
  • LM2596T-ADJ
  • LM2596HVT-ADJ

CAD (KiCad official)

  • Symbol: LM2596S-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm2596s-adj.step 180 KB You want the bare part, or you mark your own boards.
lm2596s-adj-etched.step 2.1 MB You want the part with LM2596S-ADJ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 560 faces against 135 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: UMW datasheet (28 pp, sha256 26d031e9696524e9, 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