component
ETA3521FSG
Public Made by Adomby adom
etasolution DC-DC Converters, SOT-563. Pinout cross-checked by two models against 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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README
markdownETA3521FSG
etasolution · DC-DC Converters · SOT-563
ETA3521FSG from etasolution, in a SOT-563. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground reference pin for the regulator (PIN DESCRIPTION: 'Ground'). |
| 2 | SW | power_out | Inductor connection: connect an inductor between SW and the regulator output, with SW voltage rated -0.3V to 6.5V absolute maximum. |
| 3 | VIN | power_in | Supply voltage input operating from 2.5V to 6.0V, to be bypassed with a 22µF ceramic capacitor to GND. |
| 4 | EN | input | Enable pin, where a high voltage level enables the device (EN logic high threshold 1.2V rising, logic low 0.4V falling); for automatic start-up, connect EN to VIN through a pull-up resistor. |
| 5 | FB | input | Feedback input: an external resistor divider from the output to FB and GND sets VOUT, with FB voltage 0.594V to 0.606V (0.6V typical). |
| 6 | OUT | power_out | Output pin, to be bypassed with a 22µF or larger ceramic capacitor placed closely between this pin and GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | etasolution |
| Package | SOT-563 |
| Category | Power Management (PMIC) |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
ETA3521FSG - Footprint:
Package_TO_SOT_SMD:SOT-563 - 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files:
eta3521fsg-etched.step/eta3521fsg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);eta3521fsg.step/eta3521fsg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: etasolution datasheet (10 pp, sha256
c984cf1a015ae538, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).