component

UCC2809PWTR-1

Public Made by Adom

by adom

Texas Instruments AC-DC Controllers & Regulators, TSSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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UCC2809PWTR-1

Texas Instruments · AC-DC Controllers & Regulators · TSSOP-8

UCC2809PWTR-1 from Texas Instruments, in a TSSOP-8. 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 FB input Summing node for current sense feedback, optocoupler voltage feedback and slope compensation, compared against a 1V threshold; an internal 250 on-resistance NMOS discharges external leading-edge-blanking capacitance during PWM off time.
2 SS passive Soft-start timing capacitor node, charged by an internal 6µA current source; if taken below 0.5V the output driver is inhibited and held low.
3 RT1 passive Connects timing resistor RT1 and sets the oscillator positive ramp time, Tr = 0.74 × (CT + 27pF) × RT1; minimum recommended value is 10kΩ.
4 RT2 passive Connects timing resistor RT2 and sets the oscillator negative ramp time, Tf = 0.74 × (CT + 27pF) × RT2; minimum recommended value is 4.32kΩ.
5 GND power_in Reference ground and power ground for all functions of the device.
6 OUT output High-current power driver output for an N-channel MOSFET, with a minimum series gate resistor of 3.9 recommended and an absolute IOUT limit of -0.4A to 0.8A (tpw < 1µs, duty cycle < 10%).
7 VDD power_in Power input, shunt-regulated at 17.5V (absolute maximum VDD 19V), to be bypassed with a 1µF ceramic capacitor.
8 REF power_out Buffered internal 5V reference output (5.0V typical, 4.75V to 5.25V), to be bypassed with at least a 0.47µF ceramic capacitor.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-8
Category Power Supply Chip
Pins 8

CAD (KiCad official)

  • Symbol: UCC2809PWTR-1
  • Footprint: Package_SO:TSSOP-8_3x3mm_P0.65mm
  • 3D model: TSSOP-8 (KiCad packages3D, STEP)
  • 3D model files: ucc2809pwtr-1-etched.step / ucc2809pwtr-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ucc2809pwtr-1.step / ucc2809pwtr-1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (24 pp, sha256 7fc852aa75a77966, retrieved 2026-10-08, 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