component
ETA8121S2G
Public Made by Adomby adom
etasolution DC-DC Converters, SOT23-6. 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
markdownETA8121S2G
etasolution · DC-DC Converters · SOT23-6
ETA8121S2G from etasolution, in a SOT23-6. 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 | BST | passive | Bootstrap pin for the high-side gate drive; connect a 10nF capacitor from this pin to SW, and BST voltage is rated to SW+6V (absolute maximum). |
| 2 | GND | power_in | Ground reference for the device; the input capacitor should be placed with its GND return as close as possible to the IC's GND pin, with the GND trace running underneath the IC body. |
| 3 | FB | input | Feedback input that connects to the external resistor divider from VOUT to set the output voltage (VOUT = 0.8V × (1 + Ru/Rd)), with FB absolute maximum rated at -0.3V to 6V. |
| 4 | EN | input | Enable pin that is driven high to enable the part and low to disable it, with an absolute maximum rating of 24V and a rising threshold of 1.3V to 1.9V. |
| 5 | VIN | power_in | Supply voltage input for the regulator, operating from 4.2V to 18V and to be bypassed with a 4.7μF ceramic capacitor to GND, with an absolute maximum rating of 24V. |
| 6 | SW | output | Inductor connection (switch node) for the internal power switches, rated -0.3V (-5V <10ns) to 24V (25V <10ns) and used with the external output capacitors to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | etasolution |
| Package | SOT23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
ETA8121S2G - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT23-6 (KiCad packages3D, STEP)
- 3D model files:
eta8121s2g-etched.step/eta8121s2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);eta8121s2g.step/eta8121s2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: etasolution datasheet (7 pp, sha256
00dbfb33b9d42f54, 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).