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XL1509-12

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by adom

UMW DC-DC Converters, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs xl1509-12: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json xl1509-12: specified limits as data (metadata.characteristics, 14 rows from the datasheet) · Ray
README.md xl1509-12: specified limits as data (metadata.characteristics, 14 rows from the datasheet) · Ray
xl1509-12-etched.fit.json xl1509-12: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
xl1509-12-etched.glb xl1509-12: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
xl1509-12-etched.step xl1509-12: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
xl1509-12.glb Publish 0.1.0 · Ray
xl1509-12.kicad_mod Publish 0.1.0 · Ray
xl1509-12.kicad_sym Publish 0.1.0 · Ray
xl1509-12.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
xl1509-12.step Publish 0.1.0 · Ray

XL1509-12

UMW · DC-DC Converters · SOP-8

XL1509-12 from UMW, in a SOP-8. 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 Supply Voltage Input Pin. Operates from 4.5V to 40V DC (absolute max 45V). Bypass VIN to GND with a suitably large capacitor to eliminate input noise.
2 OUTPUT output Power Switch Output Pin (SW). Internal power transistor switch node that supplies power to the output LC filter. Rated for 2A continuous, internal current limit ~4A. Absolute max -0.3V to VIN.
3 FEEDBACK input Feedback Pin (FB). Senses the output voltage through an external resistor divider and regulates it. Internal feedback threshold is 1.23V. For the fixed 12V variant the internal divider sets VOUT = 12V (typ, range 11.52V-12.48V).
4 ON/OFF input Enable/Shutdown pin with hysteresis. Drive low (<0.8V) to turn the regulator ON, drive high (>1.4V) to turn it OFF. TTL-compatible; floating defaults to low (ON). Input leakage ~5 uA.
5 GND power_in Ground pin. Route outside the Schottky-diode-to-output-capacitor ground path to avoid coupling switching current spikes into the IC. Tie all GND pins (5,6,7,8) together at the ground plane.
6 GND power_in Ground pin. Route outside the Schottky-diode-to-output-capacitor ground path to avoid coupling switching current spikes into the IC. Tie all GND pins (5,6,7,8) together at the ground plane.
7 GND power_in Ground pin. Route outside the Schottky-diode-to-output-capacitor ground path to avoid coupling switching current spikes into the IC. Tie all GND pins (5,6,7,8) together at the ground plane.
8 GND power_in Ground pin. Route outside the Schottky-diode-to-output-capacitor ground path to avoid coupling switching current spikes into the IC. Tie all GND pins (5,6,7,8) together at the ground plane. On ESOP-8 these pins are also connected to the exposed thermal pad for heatsinking.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • XL1509-12E1

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input operation voltage VIN 4.5 40 V 6
Output voltage (12V version) VOUT 11.52 12 12.48 V VIN=15V to 40V, ILOAD=0.2A to 2A 5
Oscillator Frequency FOSC 117 150 183 Khz 6
ON/OFF Pin Threshold - High (Regulator OFF) VON/OFF 1.4 V High (Regulator OFF) 6
ON/OFF Pin Threshold - Low (Regulator ON) VON/OFF 0.8 V Low (Regulator ON) 6
Input Voltage VIN -0.3 45 V 4
Feedback Pin Voltage VFB -0.3 V Upper limit is VIN 4
ON/OFF Pin Voltage VON/OFF -0.3 V Upper limit is VIN 4
Output Switch Pin Voltage VOutput -0.3 V Upper limit is VIN 4
Operating Junction Temperature TJ -40 125 °C 4
Storage Temperature TSTG -65 150 °C 4
Lead Temperature (Soldering) TLEAD 260 °C Soldering, 10 sec 4
ESD (HBM) 2000 V HBM 4
Thermal Resistance (SOIC8), Junction to Ambient RJA 100 °C/W No Heatsink, Free Air 4

CAD (KiCad official)

  • Symbol: XL1509-12
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: xl1509-12-etched.step / xl1509-12-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xl1509-12.step / xl1509-12.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
xl1509-12.step 122 KB You want the bare part, or you mark your own boards.
xl1509-12-etched.step 1.7 MB You want the part with XL1509-12 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 435 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