# UCC2808AD-2

**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-8

UCC2808AD-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 | COMP | output | Error amplifier output and PWM comparator input; 2MHz operational amplifier with low output impedance capable of sourcing and sinking current with internal current limiting. |
| 2 | FB | input | Inverting input of the error amplifier; minimize lead length and stray capacitance for optimal stability. |
| 3 | CS | input | PWM input and peak current comparator with 0.75V overcurrent threshold that triggers soft-start cycle; internal MOSFET discharges current-sense filter capacitor to improve converter dynamic response. |
| 4 | RC | output | Oscillator timing pin; connect external RC network with resistor 10-200kΩ to VDD and capacitor 100-1000pF to GND to program frequency per f=1.41/(RC), typical 175-213 kHz. |
| 5 | GND | power_in | Reference ground and power supply ground for all functions; low-impedance PCB ground plane required due to high-current and high-frequency operation. |
| 6 | OUTB | output | High-current alternating output stage capable of 500mA peak source current and 1A peak sink current; switches at half oscillator frequency with 60-200ns dead-time relative to OUTA. |
| 7 | OUTA | output | High-current alternating output stage capable of 500mA peak source current and 1A peak sink current; switches at half oscillator frequency with 60-200ns dead-time relative to OUTB. |
| 8 | VDD | power_in | Power supply input (5-14V for UCC2808A-2); bypass with 1µF ceramic capacitor close to device; total current is sum of static current and average output current dependent on switching frequency. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `UCC2808AD-2`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ucc2808ad-2-etched.step` / `ucc2808ad-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2808ad-2.step` / `ucc2808ad-2.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ucc3808a-2) (27 pp, sha256 `a8e88286e9a900bf`, retrieved 2026-10-07, 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](docs/ucc2808ad-2-datasheet.pdf)