component

TPS54478RTET

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, WQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tps54478rtetfactory-2.0.0extractor-text
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TPS54478RTET

Texas Instruments · DC-DC Converters · WQFN-16-EP(3x3)

TPS54478RTET from Texas Instruments, in a WQFN-16-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 VIN power_in Input supply voltage, 2.95 V to 6 V.
2 VIN power_in Input supply voltage, 2.95 V to 6 V.
3 GND power_in Power ground, to be electrically connected directly to the power pad under the IC.
4 GND power_in Power ground, to be electrically connected directly to the power pad under the IC.
5 AGND power_in Analog ground, to be electrically connected to GND close to the device.
6 VSENSE input Inverting node of the transconductance (gm) error amplifier.
7 COMP bidirectional Error amplifier output and input to the output switch current comparator; frequency compensation components connect to this pin.
8 RT/CLK input Resistor timing or external clock input pin; 16 kΩ to 150 kΩ sets 2000 kHz to 200 kHz switching frequency.
9 SS/TR input Slow start and tracking pin; an external capacitor sets the output voltage rise time, and the pin can also be used for tracking.
10 PH output Source of the internal high side power MOSFET and drain of the internal low side synchronous rectifier MOSFET.
11 PH output Source of the internal high side power MOSFET and drain of the internal low side synchronous rectifier MOSFET.
12 PH output Source of the internal high side power MOSFET and drain of the internal low side synchronous rectifier MOSFET.
13 BOOT output Bootstrap capacitor required between BOOT and PH; output is forced off if the capacitor voltage is below the BOOT UVLO minimum.
14 PWRGD output Open drain output that asserts low if output voltage is low due to thermal shutdown, overcurrent, over/under-voltage or EN shutdown.
15 EN input Enable pin with internal pull-up current source; pull below 1.21 V to disable, float to enable, or use two resistors to set the UVLO threshold.
16 VIN power_in Input supply voltage, 2.95 V to 6 V.
17 Thermal Pad power_in Exposed thermal pad connected to GND for proper operation, and to an internal PCB ground plane using multiple vias for thermal performance.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package WQFN-16-EP(3x3)
Category Power Management (PMIC)
Pins 17

CAD (KiCad official)

  • Symbol: TPS54478RTET
  • Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
  • 3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: tps54478rtet-etched.step / tps54478rtet-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps54478rtet.step / tps54478rtet.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (43 pp, sha256 efbe291862db5c5d, retrieved 2026-10-05, 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