UC2844AD8TR
Public Unreviewedby Ray
Texas Instruments AC-DC Controllers and Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownUC2844AD8TR
Texas Instruments · AC-DC Controllers and Regulators · SOIC-8
UC2844AD8TR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | COMP | output | Low impedance 1MHz output of the internal error amplifier and input to the PWM comparator. Open-loop gain (AVOL) is 80dB. Maximum sink current is 6mA and it is not internally current limited. |
| 2 | FB | input | Inverting input to the error amplifier. Used to sense the power converter output voltage for closed-loop regulation via a feedback network. |
| 3 | ISENSE | input | Current-sense input to the UCx84xA peak current-limit and PWM comparator. Used with a current-sense resistor for cycle-by-cycle peak current limiting. Maximum peak current-sense signal is internally clamped to 1V. |
| 4 | RT/CT | input | Internal oscillator timing input. Programmed with an external timing resistor (RT) and capacitor (CT). TI recommends 470pF to 4.7nF for CT and 5kΩ to 100kΩ for RT. |
| 5 | GND | power_in | Control-signal ground reference for the device. |
| 6 | OUTPUT | output | 1A totem-pole gate driver output. Capable of sourcing and sinking up to 1A of gate drive current. A gate-drive resistor should be used to limit peak gate-drive current. |
| 7 | VCC | power_in | Bias input for the gate driver. Requires a bypass capacitor at least 10x the gate capacitance of the main switching FET. Absolute maximum voltage 30V; UVLO 16V/10V for UC2844A. |
| 8 | VREF | power_out | 5V reference voltage output for the PWM controller. Can supply up to 100mA (short-circuit protected to <180mA). Used internally for the PWM comparator and requires a 1μF high-frequency bypass capacitor. VCC bypass capacitor should be at least 10x the VREF bypass capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
UC2844AD8TRDUC2844AD8TRUC2844AD8TRPUC2844AD8TRJGUC2844AD8TRDWUC2844AD8TRFKUC2844AD8TRFN
CAD (KiCad official)
- Symbol:
UC2844AD8TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
uc2844ad8tr.step |
122 KB | You want the bare part, or you mark your own boards. |
uc2844ad8tr-etched.step |
2.4 MB | You want the part with UC2844AD8TR already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 591 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (50 pp, sha256
0eebf00e4b265207, retrieved 2026-08-17, tier: manufacturer) - 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).