component
UCC3809DTR-2
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
markdownUCC3809DTR-2
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UCC3809DTR-2 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 the external filter capacitor during PWM off time. |
| 2 | SS | bidirectional | Soft-start pin charged by an internal 6µA source into the soft-start capacitor, and pulling it below 0.5V inhibits the output driver, turns off REF and reduces IVDD to under 100µA. |
| 3 | RT1 | passive | Timing resistor pin that sets the oscillator positive ramp time Tr = 0.74 x (CT + 27pF) x RT1, with minimum recommended RT1 of 10kΩ. |
| 4 | RT2 | passive | Timing resistor pin that sets the oscillator negative ramp time Tf = 0.74 x (CT + 27pF) x RT2, with minimum recommended RT2 of 4.32kΩ, and connects to timing capacitor CT. |
| 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 peak) for N-channel MOSFETs, with a minimum series gate resistor of 3.9 ohm 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 (4.75V to 5.25V), 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:
UCC3809DTR-2 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ucc3809dtr-2-etched.step/ucc3809dtr-2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc3809dtr-2.step/ucc3809dtr-2.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 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).