# UC3823DWTR

**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-16-300mil

UC3823DWTR from Texas Instruments, in a SOIC-16-300mil. 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 | Inv. | input | Inverting input of the wide-bandwidth error amplifier; analog input rated -0.3V to +6V. |
| 2 | N.I. | input | Non-inverting input of the error amplifier; analog input rated -0.3V to +6V. |
| 3 | E/A Out | output | Error amplifier output; output current limited to 5mA maximum. |
| 4 | Clock | output | Oscillator clock output; output current limited to -5mA maximum. |
| 5 | RT | passive | Oscillator timing resistor connection; oscillator charging current limited to -5mA maximum. |
| 6 | CT | passive | Oscillator timing capacitor connection. |
| 7 | Ramp | input | Ramp input to the PWM comparator; analog input rated -0.3V to +6V. |
| 8 | Soft Start | bidirectional | Soft-start pin that also serves as maximum duty cycle clamp; sink current limited to 20mA maximum and analog input rated -0.3V to +6V. |
| 9 | ILIM/S.D. | input | Shutdown comparator input with 1.4V threshold; analog input rated -0.3V to +6V. |
| 10 | Ground | power_in | Signal ground; all voltages are referenced to this pin. |
| 11 | ILIMREF | input | DC reference input voltage to the current limit comparator; analog input rated -0.3V to +6V. |
| 12 | Pwr Gnd | power_in | Power ground for the totem pole output stage. |
| 13 | Vc | power_in | Supply for the totem pole output stage; 30V maximum. |
| 14 | Out | output | Totem pole output; 0.5A DC and 2.0A (0.5us pulse) maximum source or sink current, 1.5A peak. |
| 15 | Vcc | power_in | Positive supply voltage for the controller; 30V maximum. |
| 16 | VREF | power_out | 5.1V trimmed bandgap reference output. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `UC3823DWTR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `uc3823dwtr-etched.step` / `uc3823dwtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3823dwtr.step` / `uc3823dwtr.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/uc2823) (14 pp, sha256 `4c7cb35bc54029af`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-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).

[Datasheet PDF](docs/uc3823dwtr-datasheet.pdf)