# ETA3418S2F

**etasolution** · DC-DC Converters · SOT-23-5

ETA3418S2F from etasolution, in a SOT-23-5. 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 and low to disable, with EN rising threshold 1.2V and falling threshold 0.4V, and the pin defaults low when floating. |
| 2 | GND | power_in | Ground reference pin for the regulator; connect it to a large copper area to cool the chip and improve thermal performance. |
| 3 | SW | output | Inductor connection: connect an inductor between SW and the regulator output, with the high-side current limit specified at 3A. |
| 4 | IN | power_in | Supply voltage input with a 2.6V to 7V input range, to be bypassed with a 10µF ceramic capacitor to GND, and with UVLO rising at 2.35V typical. |
| 5 | FB | input | Feedback input: an external resistor divider from the output to FB and GND sets the output between 0.6V and VIN, with the FB threshold at 0.6V (0.588V to 0.612V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | etasolution |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `ETA3418S2F`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `eta3418s2f-etched.step` / `eta3418s2f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `eta3418s2f.step` / `eta3418s2f.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/8590903504875696128) (8 pp, sha256 `6cc777755cbd8222`, 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/eta3418s2f-datasheet.pdf)