component
TPS2231RGPR
Public Made by Adomby adom
Texas Instruments Power Distribution Switches, VQFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, 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
markdownTPS2231RGPR
Texas Instruments · Power Distribution Switches · VQFN-20-EP(4x4)
TPS2231RGPR from Texas Instruments, in a VQFN-20-EP(4x4). 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 | STBY | input | Active-low standby input that, when asserted after card insertion, turns off the 3.3-V and 1.5-V switches and keeps AUX on; internally pulled up to AUXIN. |
| 2 | 3.3VIN | power_in | 3.3-V input supply for the 3.3VOUT switch; absolute maximum input range is -0.3 V to 6 V. |
| 3 | 3.3VOUT | power_out | Switched output that delivers 0 V, 3.3 V or high impedance to the card. |
| 4 | NC | unconnected | No connection. |
| 5 | NC | unconnected | No connection. |
| 6 | SYSRST | input | Active-low system reset input driven by the host that forces PERST to assert; internally pulled up to AUXIN. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | PERST | output | Logic-level power-good output to slot 0 (with delay), asserted low until all rails are in tolerance and RCLKEN is released. |
| 9 | CPUSB | input | Card-present input for USB cards; logic low indicates the card supports USB functions; internally pulled up to AUXIN. |
| 10 | CPPE | input | Card-present input for PCI Express cards; logic low indicates the card supports PCI Express functions; internally pulled up to AUXIN. |
| 11 | 1.5VOUT | power_out | Switched output that delivers 0 V, 1.5 V or high impedance to the card. |
| 12 | 1.5VIN | power_in | 1.5-V input for the 1.5VOUT switch; absolute maximum input range is -0.3 V to 6 V. |
| 13 | NC | unconnected | No connection. |
| 14 | NC | unconnected | No connection. |
| 15 | AUXOUT | power_out | Switched output that delivers 0 V, AUX or high impedance to the card. |
| 16 | NC | unconnected | No connection. |
| 17 | AUXIN | power_in | AUX input for AUXOUT and chip power; absolute maximum input range is -0.3 V to 6 V. |
| 18 | RCLKEN | bidirectional | Reference clock enable: as an output it is a open-drain power-good to the host for slot 0 (no delay); as an input, holding it low prevents PERST from being de-asserted; internally pulled up to AUXIN. |
| 19 | OC | output | Open-drain overcurrent status output for slot 0, asserted low when an overcurrent condition occurs on the AUX, 3.3-V or 1.5-V switch. |
| 20 | SHDN | input | Active-low shutdown input that turns off all voltage outputs and activates the discharge FETs; internally pulled up to AUXIN. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-20-EP(4x4) |
| Category | Power Supply Chip |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
TPS2231RGPR - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: VQFN-20-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
tps2231rgpr-etched.step/tps2231rgpr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tps2231rgpr.step/tps2231rgpr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (44 pp, sha256
c6bc7fcb544329ed, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).