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TPS2231MRGPR

Public Made by Adom

by adom

Texas Instruments Power Distribution Switches, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TPS2231MRGPR

Texas Instruments · Power Distribution Switches · QFN-20-EP(4x4)

TPS2231MRGPR from Texas Instruments, in a QFN-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 with internal pull-up to AUXIN; when asserted after card insertion it turns off the 3.3-V and 1.5-V switches and keeps AUX on, and when asserted before a card is present it places the switch in OFF mode.
2 3.3VIN power_in 3.3-V input for 3.3VOUT; the absolute maximum input voltage 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 internal connection.
5 NC unconnected No internal connection.
6 SYSRST input Active-low system reset input driven by the host with internal pull-up to AUXIN; asserting it forces PERST to assert without disrupting the voltage rails.
7 GND power_in Ground.
8 PERST output Logic-level power-good output to slot 0 (with delay); it is asserted low until all power rails are within tolerance and RCLKEN is released, then deasserted after a time delay.
9 CPUSB input Card-present input for USB cards, internally pulled up to AUXIN; a logic low indicates the card supports USB functions.
10 CPPE input Card-present input for PCI Express cards, internally pulled up to AUXIN; a logic low indicates the card supports PCI Express functions.
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 1.5VOUT; the absolute maximum input voltage range is -0.3 V to 6 V.
13 NC unconnected No internal connection.
14 NC unconnected No internal connection.
15 AUXOUT power_out Switched output that delivers 0 V, AUX or high impedance to the card.
16 NC unconnected No internal connection.
17 AUXIN power_in AUX input for AUXOUT and chip power; absolute maximum input voltage range is -0.3 V to 6 V.
18 RCLKEN bidirectional Reference clock enable: as an output it is an open-drain power-good to the host for slot 0 (no delay); as an input, holding it low keeps PERST from being deasserted; internally pulled up to AUXIN and must not be driven high externally.
19 OC output Open-drain overcurrent status output for slot 0 that is asserted low (with deglitch delay) when the AUX, 3.3-V or 1.5-V switch is in overcurrent; OC sink current is limited to 10 mA.
20 SHDN input Active-low shutdown input with internal pull-up to AUXIN; when asserted it turns off all voltage outputs and activates the discharge FETs.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package QFN-20-EP(4x4)
Category Power Management (PMIC)
Pins 21

CAD (KiCad official)

  • Symbol: TPS2231MRGPR
  • Footprint: Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
  • 3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: tps2231mrgpr-etched.step / tps2231mrgpr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps2231mrgpr.step / tps2231mrgpr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (44 pp, sha256 c6bc7fcb544329ed, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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