# ETA3406S2F

**etasolution** · DC-DC Converters · SOT23-5

ETA3406S2F from etasolution, in a SOT23-5. 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 | EN | input | Enable pin for the IC: drive high to enable the part and low to disable it; the EN input low maximum is 0.4V and the input high minimum is 1.5V. |
| 2 | GND | power_in | Ground pin for the regulator. |
| 3 | SW | output | Inductor connection: connect the inductor between SW and the regulator output. |
| 4 | IN | power_in | Supply voltage input with an operating input range of 2.6V to 6V per the electrical characteristics; bypass with a 10μF ceramic capacitor to GND. |
| 5 | FB | input | Feedback input: connect an external resistor divider from the output to FB and GND to set the output between 0.6V and VIN. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | etasolution |
| Package | SOT23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `ETA3406S2F`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `eta3406s2f-etched.step` / `eta3406s2f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `eta3406s2f.step` / `eta3406s2f.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [etasolution datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904370697752576) (6 pp, sha256 `ee8218b62eaa941c`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/eta3406s2f-datasheet.pdf)