component
UCC2809DTR-1
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-8. 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
markdownUCC2809DTR-1
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UCC2809DTR-1 from Texas Instruments, in a SOIC-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 to a 1V threshold, with an internal 250 ohm NMOS discharging external filter capacitance during PWM off time for leading edge blanking. |
| 2 | SS | bidirectional | Soft start pin where the timing capacitor is charged by an internal 6µA current source, and taking it below 0.5V inhibits the output driver, turns off REF and drops IVDD below 100µA. |
| 3 | RT1 | passive | Connects to timing resistor RT1, which sets the positive ramp time of the internal oscillator (Tr = 0.74 × (CT + 27pF) × RT1). |
| 4 | RT2 | passive | Connects to timing resistor RT2, which sets the negative ramp time of the internal oscillator (Tf = 0.74 × (CT + 27pF) × RT2), with timing capacitor CT at the common node. |
| 5 | GND | power_in | Reference ground and power ground for all functions. |
| 6 | OUT | output | High current power driver output (0.4A source/0.8A sink) for N-channel MOSFETs, with a minimum series gate resistor of 3.9 ohms recommended. |
| 7 | VDD | power_in | Power input shunt regulated at 17.5V (absolute maximum 19V), to be bypassed with a 1µF ceramic capacitor. |
| 8 | REF | power_out | Buffered internal 5V reference output, to be bypassed with a 0.47µF ceramic capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC2809DTR-1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ucc2809dtr-1-etched.step/ucc2809dtr-1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc2809dtr-1.step/ucc2809dtr-1.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).