component
XL1509-3.3
Public Made by Adomby adom
UMW DC-DC Converters, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownXL1509-3.3
UMW · DC-DC Converters · SOP-8
XL1509-3.3 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-line noise. |
| 2 | OUTPUT | output | Power Switch Output Pin (SW). Switch node connecting the internal power transistor's emitter to the external inductor and Schottky catch diode; delivers up to 2A of switched current at 150 kHz. |
| 3 | FEEDBACK | input | Feedback Pin (FB). For fixed-output versions (3.3V here), tie directly to the regulated output; internal divider senses against the 1.23V reference. Absolute max: -0.3 to VIN. |
| 4 | ON/OFF | input | Enable Pin. Drive low (<0.8V) to turn the regulator ON, drive high (>1.4V) to turn it OFF. Floating defaults low (ON). Shutdown supply current typ. 80 µA. |
| 5 | GND | power_in | Ground pin. Should be placed outside the Schottky diode to output capacitor ground path to prevent switching-current spikes from inducing voltage noise into the IC. Pins 5, 6, 7, 8 are all GND and should be tied together. |
| 6 | GND | power_in | Ground pin (see pin 5). Tie all four GND pins to a solid ground plane for current return and thermal dissipation. |
| 7 | GND | power_in | Ground pin (see pin 5). Tie all four GND pins to a solid ground plane for current return and thermal dissipation. |
| 8 | GND | power_in | Ground pin (see pin 5). Tie all four GND pins to a solid ground plane for current return and thermal dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
XL1509-3.3XL1509E-3.3
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage (3.3V fixed version) | VOUT | 3.168 | 3.3 | 3.432 | V | XL1509-3.3 system test circuit Figure 5; VIN=4.75V to 40V; ILOAD=0.2A to 2A; TA=25°C unless otherwise specified | 5 |
| Input operation voltage | VIN | 4.5 | V | 6 | |||
| Oscillator frequency | FOSC | 117 | 150 | 183 | Khz | VFB=0 | 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 (absolute maximum) | VIN | -0.3 | 45 | V | 4 | ||
| Feedback pin voltage (absolute maximum) | VFB | -0.3 | V | upper limit printed as VIN | 4 | ||
| ON/OFF pin voltage (absolute maximum) | VON/OFF | -0.3 | V | upper limit printed as VIN | 4 | ||
| Output switch pin voltage (absolute maximum) | VOutput | -0.3 | V | upper limit printed as 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) | ESD | 2000 | V | HBM | 4 | ||
| Thermal resistance, junction to ambient (SOIC8) | RJA | 100 | °C/W | Junction to ambient, no heatsink, free air | 4 | ||
| Input supply voltage range (recommended operating) | VIN | 4.5 | 40 | V | 2 |
CAD (KiCad official)
- Symbol:
XL1509-3.3 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
xl1509-3-3-etched.step/xl1509-3-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xl1509-3-3.step/xl1509-3-3.glbare the bare package body.
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).