# TX4114

**XDS** · DC-DC Converters · SOP-8

TX4114 from XDS, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VFB | input | Output voltage feedback pin. Connect to the mid-point of the R1/R2 divider from VOUT to GND. The internal regulation comparator references Vref = 1.21 V, so VOUT = 1.21 * (R1/R2 + 1). Feedback input current is ~0.05 uA. |
| 2 | TOFF | passive | Oscillator / switching-frequency programming pin. Connect a resistor R4 to GND to set FOSC, per R4(kOhm) = 22000 / FOSC(kHz). Programmable range 150 kHz to 500 kHz (typ 220 kHz at R4 = 100 kOhm). Absolute max on this pin is -0.3 to 6 V. |
| 3 | CUR | passive | Output current-limit programming pin. Connect a resistor R3 to GND to set the current limit, per R3(kOhm) = 29.523 * IOUT. Internal current-limit comparator sink current is typ 8.5 uA (7-10 uA). Absolute max on this pin is -0.3 to 6 V. |
| 4 | VDD | power_in | Chip power supply input (also labeled VIN in the typical application). Operating range 8-30 V, absolute max -3.3 to 32 V. Requires an external electrolytic bulk-decoupling capacitor to GND. Quiescent current is ~10-20 mA at no load. |
| 5 | SW1 | output | Switch node output 1. Internally tied together with SW2 (pin 6) to the drain junction of the integrated high-side P-MOSFET (Rds(on) ~65 mOhm) and low-side N-MOSFET (Rds(on) ~30 mOhm). Connect to the external inductor of the buck output filter. Absolute max -0.3 to 32 V. |
| 6 | SW2 | output | Switch node output 2. Internally the same node as SW1 (pin 5) - the pins are paralleled for current handling. Connect together with SW1 to the external inductor. Absolute max -0.3 to 32 V. |
| 7 | GND | power_in | Chip ground / power return. Internally common with pin 8; both should be tied to the PCB ground plane for the power stage return current. |
| 8 | GND | power_in | Chip ground / power return. Internally common with pin 7; both should be tied to the PCB ground plane for the power stage return current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XDS |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage (allowable range) | VIN | 8 |  | 30 | V |  | 4 |
| Quiescent current | IQ |  | 10 | 20 | mA | ILOAD =0A | 4 |
| Feedback voltage | VFB | 1.18 | 1.21 | 1.24 | V |  | 4 |
| Switching frequency range | FOSC | 150 |  | 500 | kHz |  | 4 |
| Switching frequency | FOSC | 180 | 220 | 260 | kHz | RFRE =100k | 4 |
| Maximum duty cycle | DC |  |  | 100 | % |  | 4 |
| Current limit threshold current | ILIM.TH | 7 | 8.5 | 10 | μA |  | 4 |
| Input voltage |  | -3.3 |  | 32 | V |  | 4 |
| VFB, TOFF, CUR voltage |  | -0.3 |  | 6 | V |  | 4 |
| SW voltage |  | -0.3 |  | 32 | V |  | 4 |
| Normal operating temperature range |  | -40 |  | 85 | ℃ |  | 4 |
| Normal ambient working temperature (note 2) |  | 0 |  | 70 | ℃ | Note 2: normal working ambient; outside range may affect stability | 4 |
| Storage temperature |  | -65 |  | 150 | ℃ |  | 4 |
| Junction temperature range |  |  |  | 150 | ℃ |  | 4 |
| Soldering temperature |  |  |  | 256 | ℃ |  | 4 |

## CAD (KiCad official)

- Symbol: `TX4114`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `tx4114-etched.step` / `tx4114-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tx4114.step` / `tx4114.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`tx4114.step`](tx4114.step) | 122 KB | You want the bare part, or you mark your own boards. |
| [`tx4114-etched.step`](tx4114-etched.step) | 1.0 MB | You want the part with `TX4114` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 291 faces against 147 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [XDS datasheet](docs/tx4114-datasheet.pdf) (6 pp, sha256 `99888ddfe5df6838`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tx4114-datasheet.pdf)