# UCC3804PWTR

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

UCC3804PWTR 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 | COMP is the error amplifier output and PWM comparator input; the low-output-impedance error amplifier can both source and sink current, and forcing COMP to GND gives zero duty cycle. |
| 2 | FB | input | FB is the inverting input of the error amplifier, and the FB lead should be kept as short as possible with minimal stray capacitance for best stability. |
| 3 | CS | input | CS is the input to the PWM comparator and the over-current comparator, with 100 ns digital leading-edge blanking after OUT rises, and exceeding the over-current threshold (1.55 V typical, 1.42 V to 1.68 V) triggers a soft-start cycle. |
| 4 | RC | input | RC is the oscillator timing pin, where a resistor from REF sets the charging current and a timing capacitor to GND sets the frequency; timing resistors should be 10 kΩ to 200 kΩ, timing capacitors 100 pF to 1000 pF, and resistors below 10 kΩ must not be used. |
| 5 | GND | power_in | GND is the reference and power ground for all functions on the device, and signal return paths should be separated from the high-current gate-driver path. |
| 6 | OUT | output | OUT is the high-current power driver output for MOSFET gates, capable of driving peak currents above ±750 mA (absolute maximum OUT current ±1 A), and is held actively low while VCC is below its threshold. |
| 7 | VCC | power_in | VCC is the device supply input, normally fed through a current-limiting resistor, with a recommended supply of 11 V from a low-impedance source, an absolute maximum of 12 V and 30 mA, and an internal zener clamp of about 13.5 V typical. |
| 8 | REF | output | REF is the voltage reference for the error amplifier and other internal circuits, must be bypassed to GND with at least a 0.1 µF ceramic capacitor placed close to the pin, and is pulled low through 5 kΩ when VCC is above 1 V and below the UVLO threshold. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `UCC3804PWTR`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ucc3804pwtr-etched.step` / `ucc3804pwtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc3804pwtr.step` / `ucc3804pwtr.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/ucc2805) (59 pp, sha256 `3f7e3ad23bdb4f2f`, retrieved 2026-10-12, 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-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](docs/ucc3804pwtr-datasheet.pdf)