# UCC2813QPWR-3Q1

**Texas Instruments** · DC-DC Controllers · TSSOP-8

UCC2813QPWR-3Q1 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 | COMP | output | Error amplifier output and PWM comparator input; feedback loop compensation is applied between this pin and the FB pin; clamped by internal soft-start to 4ms ramp from 0V on device startup or after overcurrent fault. |
| 2 | FB | input | Inverting input of the error amplifier; receives feedback signal for output voltage regulation; voltage range −0.1V to 6V or VVCC, whichever is smaller. |
| 3 | CS | input | Current sense comparator input for both PWM and overcurrent functions with 100ns leading-edge blanking; maximum input signal 0.9V to 1.1V with 1.65V/V gain typical; input bias current ±200nA. |
| 4 | RC | input | Oscillator timing programming pin; external resistor and capacitor program switching frequency from 1kHz to 1MHz and maximum duty cycle; voltage range −0.1V to 6V or VVCC. |
| 5 | GND | power_in | Reference ground for all device functions and power supply ground; low-current path for all return signals to minimize noise coupling. |
| 6 | OUT | output | High-current CMOS totem-pole output capable of driving MOSFET gates with ±1A peak current; output range −0.1V to VVCC; pulled low during UVLO; includes on-chip zener clamp to VCC. |
| 7 | VCC | power_in | Bias power supply input; typically 11V from low-impedance source during normal operation through current-limiting resistor; internal zener clamp at 13.5V typical; UVLO thresholds 4.1V turn-on, 3.6V turn-off for this -3 variant. |
| 8 | REF | output | 4V precision voltage reference output (±1.5% tolerance at 25°C) for error amplifier and internal biasing; source capability 5mA; requires 0.1µF ceramic bypass capacitor to GND; pulled low through 5kΩ internal resistor when VCC is 1V to UVLO threshold. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `UCC2813QPWR-3Q1`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ucc2813qpwr-3q1-etched.step` / `ucc2813qpwr-3q1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2813qpwr-3q1.step` / `ucc2813qpwr-3q1.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/ucc2813-0-q1) (47 pp, sha256 `114dd59e68535e9e`, retrieved 2026-10-03, 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/ucc2813qpwr-3q1-datasheet.pdf)