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LM2591HVS-3.3

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by Ray

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

componentpmiclm2591hvs-3.3
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Contents

README

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LM2591HVS-3.3

UMW · DC-DC Converters · TO-263

LM2591HVS-3.3 from UMW, in a TO-263. 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 4.5V to 60V; absolute max 63V. Requires a low-ESR input capacitor (e.g. 680 µF) close to the pin.
2 Output output Switching output from the internal power switch. Connects to the external catch diode (e.g. 1N5824 Schottky) and inductor of the buck power stage. Absolute max output-to-ground steady-state is -1V.
3 GND power_in Device ground reference for all internal circuitry. Tie directly to the system ground plane with the input and output capacitor return paths.
4 Feedback input Output voltage feedback sense input. For the fixed 3.3V version this pin is tied directly to the regulated output node (post-inductor, at COUT) for internal regulation to 3.3V ±4%.
5 ON/OFF input Active-low TTL-compatible shutdown input. Regulator is enabled when the pin is Low or left floating; pulling High places the device into low-power standby mode (IQ typically 80 µA). Absolute max input 25V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • LM2591HVS-3.3S
  • LM2591HVS-3.3T

CAD (KiCad official)

  • Symbol: LM2591HVS-3.3
  • Footprint: Package_TO_SOT_SMD:TO-263-2
  • 3D model: TO-263 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: UMW datasheet (22 pp, sha256 3830e8a059139e73, 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