component

TX4221

Public Made by Adom

by adom

XDS DC-DC Converters, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs tx4221: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json tx4221: specified limits as data (metadata.characteristics, 22 rows from the datasheet) · Ray
README.md tx4221: specified limits as data (metadata.characteristics, 22 rows from the datasheet) · Ray
tx4221-etched.fit.json tx4221: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
tx4221-etched.glb tx4221: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
tx4221-etched.step tx4221: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
tx4221.glb Publish 0.1.0 · Ray
tx4221.kicad_mod Publish 0.1.0 · Ray
tx4221.kicad_sym Publish 0.1.0 · Ray
tx4221.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
tx4221.step Publish 0.1.0 · Ray

TX4221

XDS · DC-DC Converters · SOP-8

TX4221 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 DRV output Gate drive output for the external power MOSFET. Rise/fall time ~50 ns into 500 pF; absolute maximum 8 V.
2 VDD power_in Chip supply input. Operating range 5-40 V (absolute max 45 V). UVLO threshold ~4.8 V; operating current ~2.5 mA at 200 kHz.
3 EN input Chip enable, active high. VIH >= 3.2 V, VIL <= 0.8 V. Absolute max 45 V. Pulling EN low puts the chip in standby (~75 uA).
4 ROSC input External resistor to GND sets the switching frequency: Fs = 4.83e7 / (ROSC + 1.08e5) Hz. With ROSC tied directly to GND the internal frequency defaults to ~450 kHz; typical values 100-330 kOhm (150 kHz at 330 kOhm).
5 FB input Output voltage feedback pin. Internal reference V_FB = 1.000 V (975-1025 mV). Vout = (R1+R2)/R1 * V_FB. Absolute max 6.5 V.
6 NC unconnected No connection; leave floating (悬空).
7 GND power_in Device ground reference.
8 VCS input MOSFET switch current-limit sense input. Over-current threshold typ. 250 mV (240-260 mV). Peak inductor current IPK <= 0.25 / R_CS. Absolute max 6.5 V.

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
工作电压 VDD 5 40 V 4
过流保护阀值 TH_VCS 240 250 260 mV 4
FB脚采样电压 V_FB 975 1000 1025 mV 4
输入电压 VDD -0.3 45 V 3
使能 EN -0.3 45 V 3
驱动端 DRV -0.3 8 V 3
最大输入 V_MAX -0.3 6.5 V TOFF/FB/CS 3
工作结温度 TA -40 85 ℃ 3
存储温度 T_STG -40 120 ℃ 3
焊接温度 T_SD 240 ℃ 焊接，10秒左右 3
静电耐压值 V_ESD 2 KV 人体模型 3
功耗 P_SOP8 0.8 W P_SOP8 3
欠压保护电压 V_UVLO 4.8 V 4
工作电流 IOP 2.5 mA FoP=200KHz 4
待机输入电流 I_INQ 75 uA 无负载， EN 为低电平 4
工作频率 F_TOFF 150 KHz ROSC=330K 4
EN端_高电平 H_EN 3.2 V 4
EN端_低电平 L_EN 0.8 V 4
DRV驱动上升时间 T_RISE 50 ns DRV脚接500P电容 4
DRV驱动下降时间 T_FALL 50 ns DRV脚接500P电容 4
过温保护 TH_OTP 140 ℃ 4
最大占空比 D_MAX 87 % VFB=0V 4

CAD (KiCad official)

  • Symbol: TX4221
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: tx4221-etched.step / tx4221-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tx4221.step / tx4221.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
tx4221.step 122 KB You want the bare part, or you mark your own boards.
tx4221-etched.step 1.2 MB You want the part with TX4221 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 324 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 (6 pp, sha256 baf00f6a9445dd43, 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).

Datasheet PDF