# TPS65235RUKR

**Texas Instruments** · Power Management - Specialized · WQFN-20-EP(3x3)

TPS65235RUKR from Texas Instruments, in a WQFN-20-EP(3x3). 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 | LX | output | Switching node of the boost converter. |
| 2 | VIN | power_in | Input to internal linear regulator; 4.5 V to 20 V recommended operating range. |
| 3 | VCC | power_out | Internal 6.3-V power supply; connect 1-μF ceramic capacitor to ground. |
| 4 | AGND | power_in | Analog ground; connect all ground pins and power pad together. |
| 5 | TCAP | output | Capacitor connection point for setting the LNB output rise time. |
| 6 | ISET | output | Resistor connection point for setting the LNB output current limit. |
| 7 | EN | input | Enable pin; pull to ground to disable VLNB output and enable I2C access when low. |
| 8 | FAULT | tri_state | Open-drain output pin; goes low when any fault flag is set. |
| 9 | ADDR | input | I2C address selection input; connect different resistor values to set I2C address. |
| 10 | VCTRL | input | Voltage control input; voltage level at this pin sets the output voltage. |
| 11 | SDA | bidirectional | I2C compatible bi-directional data line. |
| 12 | SCL | input | I2C compatible clock input. |
| 13 | EXTM | input | External modulation logic input; activates 22-kHz tone output with 22-kHz tone or logic signals. |
| 14 | DOUT | output | Tone detection output. |
| 15 | DIN | input | Tone detection input. |
| 16 | VLNB | power_out | LNB output voltage; 13 V to 18 V nominal output to satellite receiver or switch. |
| 17 | VCP | power_out | Gate drive supply voltage from charge pump; connect capacitor between this pin and VLNB. |
| 18 | BOOST | power_out | Boost regulator output; serves as input voltage to the internal linear regulator. |
| 19 | GDR | output | Gate drive control output for external MOSFET in DiSEqC 2.x support. |
| 20 | PGND | power_in | Power ground for boost converter; must be connected to all ground pins together. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-20-EP(3x3) |
| Category | Power Management (PMIC) |
| Pins | 21 |

## CAD (KiCad official)

- Symbol: `TPS65235RUKR`
- Footprint: `Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm`
- 3D model: WQFN-20-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tps65235rukr-etched.step` / `tps65235rukr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps65235rukr.step` / `tps65235rukr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tps65235) (40 pp, sha256 `8f67bea0c1b79153`, retrieved 2026-10-03, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/tps65235rukr-datasheet.pdf)