# DX2980

**Dersem** · DC-DC Converters · SOT-23-6

DX2980 from Dersem, in a SOT-23-6. 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: connect a capacitor between SW and BST to form a floating supply across the power switch driver that drives the switch gate above the supply voltage (BST to GND limited to VSW-0.3 to VSW+6 V). |
| 2 | GND | power_in | Ground and voltage reference for the regulated output voltage; requires special layout care and isolation from the D1 to C1 ground path to prevent switching current spikes. |
| 3 | FB | input | Feedback input that sets the output voltage from an external resistor divider (0.812V typical reference), with the oscillator frequency foldback active when FB is below 250mV. |
| 4 | EN | input | On/Off control: pull EN above 1.35V to turn the device on, or connect to VIN through a 0.1MΩ resistor for automatic enable. |
| 5 | VIN | power_in | Supply voltage input, 5.0V to 80V operating (85V absolute maximum), requiring input capacitor C1 to prevent large voltage spikes at the input. |
| 6 | SW | output | Power switching output, the drain of the N-channel power MOSFET, supplying power to the output LC filter (-0.3V to VIN+0.3V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Dersem |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `DX2980`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `dx2980-etched.step` / `dx2980-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dx2980.step` / `dx2980.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Dersem datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603378637052276736) (7 pp, sha256 `42e20655b0d4f153`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/dx2980-datasheet.pdf)