component

XL1509-ADJ

Public Unreviewed

by Ray

UMW DC-DC Converters, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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XL1509-ADJ

UMW · DC-DC Converters · SOIC-8

XL1509-ADJ from UMW, in a SOIC-8. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Supply Voltage Input Pin. Operates from a 4.5 V to 40 V DC supply (absolute max 45 V). Bypass VIN to GND with a suitably large capacitor (e.g. 470 uF/35 V in the typical application) to eliminate input noise.
2 OUTPUT output Power Switch Output Pin (SW). Internal power transistor switch node that supplies power to the external inductor/Schottky diode network driving the output. Rated -0.3 V to VIN.
3 FEEDBACK input Feedback Pin (FB). Through an external resistor divider network, FEEDBACK senses the output voltage and regulates it. The internal feedback threshold voltage is 1.23 V. Rated -0.3 V to VIN.
4 ON/OFF input Enable Pin with hysteresis. Drive ON/OFF low (TTL) to turn on the device; drive high to turn it off. Floating defaults to low (device ON). Rated -0.3 V to VIN.
5 GND power_in Ground Pin. Care must be taken in layout: this pin should be placed outside of the Schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. Pins 5, 6, 7, 8 are all GND.
6 GND power_in Ground Pin. Care must be taken in layout: this pin should be placed outside of the Schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. Pins 5, 6, 7, 8 are all GND.
7 GND power_in Ground Pin. Care must be taken in layout: this pin should be placed outside of the Schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. Pins 5, 6, 7, 8 are all GND.
8 GND power_in Ground Pin. Care must be taken in layout: this pin should be placed outside of the Schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. Pins 5, 6, 7, 8 are all GND.

Key specifications

Parameter Value
Manufacturer UMW
Package SOIC-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

The extractor listed these alongside XL1509-ADJ, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • XL1509-ADJUMW XL1509-ADJ
  • XL1509-ADJUMW XL1509E-ADJ

CAD (KiCad official)

  • Symbol: XL1509-ADJ
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
xl1509-adj.step 122 KB You want the bare part, or you mark your own boards.
xl1509-adj-etched.step 1.8 MB You want the part with XL1509-ADJ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 454 faces against 147 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 (15 pp, sha256 bd5713838034a224, 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