component
TX4144B
Public Unreviewedby Ray
XDS DC-DC Converters, SOP-8. Datasheet-verified pinout, 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
markdownTX4144B
XDS · DC-DC Converters · SOP-8
TX4144B 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 | FB | input | Output feedback voltage sense pin. Connect the top of an R1/R2 resistor divider from VOUT to this pin; the internal error amplifier regulates FB to the 0.82 V (typ.) reference. Feedback bias current is ~0.1 µA typical. |
| 2 | FS | input | Switching-frequency programming pin. Leave floating for the default ~140 kHz oscillator; tie a resistor R_FS = 140 / (f_SW − 140) [MΩ, kHz] to GND to set frequencies up to ~500 kHz (e.g. 470 kΩ → ~450 kHz). |
| 3 | EN | input | Chip enable input. Rising threshold ~1.1 V, falling ~0.8 V, ~300 mV hysteresis; input current ~0.1 µA. Drive from an MCU to gate operation; if unused, tie directly to VIN (must not be left floating). Absolute max 65 V; do not sink more than 100 µA. |
| 4 | VIN | power_in | Chip power supply input, 6 V to 60 V operating range (65 V absolute maximum). Bypass close to the pin with a 100 nF ceramic in parallel with a low-ESR ~47 µF/63 V electrolytic. Quiescent current ~0.15 mA; shutdown current ~1 µA. |
| 5 | SW | output | Switch node output from the internal high-side power MOSFET (60 V/2 A). Connect to the external inductor and the cathode of the freewheeling Schottky diode (e.g. SS56). Absolute range −0.3 V to VIN+0.3 V; current-limit threshold ~2.4 A; minimum on-time ~100 ns. |
| 6 | SW | output | Second SW pad - internally connected to pin 5. Parallel both pins to the inductor/Schottky node. |
| 7 | VSS | power_in | Ground return. Pins 7 and 8 are the chip GND; tie both to the ground plane with generous copper for thermal performance. |
| 8 | VSS | power_in | Second ground pad - internally the same net as pin 7. Connect to the ground plane. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XDS |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
TX4144B - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
tx4144b.step |
122 KB | You want the bare part, or you mark your own boards. |
tx4144b-etched.step |
1.3 MB | You want the part with TX4144B already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 353 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 (9 pp, sha256
25ae5eaa31a5f0da, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).