component
UC3844AD8TR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownUC3844AD8TR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UC3844AD8TR 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 | Low impedance 1MHz internal error amplifier output that also serves as the input to the peak current limit or PWM comparator with an open-loop gain (AVOL) of 80dB and a maximum sink current of 6mA. |
| 2 | FB | input | Input to the error amplifier used to control the power supply converter output voltage feedback loop for stability. |
| 3 | ISENSE | input | Input to the peak current limit or PWM comparator that controls the cycle-by-cycle peak current limit of the power system when used with a current sense resistor, with the maximum peak current sense signal internally clamped to 1V. |
| 4 | RT/CT | input | Input to the internal oscillator programmed using external timing resistor (RT) and timing capacitor (CT) with recommended values of 470pF to 4.7nF for capacitance and 5kΩ to 100kΩ for resistor. |
| 5 | GND | power_in | Controller signal ground. |
| 6 | OUTPUT | output | 1A totem pole gate driver output that can pull in or sink up to 1A of gate driver current and requires a gate driver resistor to limit the current. |
| 7 | VCC | power_in | Gate driver bias input that must have a bias capacitor with capacitance at least 10 times larger than the main switch FET gate capacitance used in the design. |
| 8 | VREF | power_in | Reference voltage output for the PWM controller that must supply no more than 10mA of current in normal operation and is short-circuit protected at approximately 100mA, requiring a 1µF high-frequency bypass capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UC3844AD8TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
uc3844ad8tr-etched.step/uc3844ad8tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3844ad8tr.step/uc3844ad8tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (54 pp, sha256
1f5ad8805f414728, retrieved 2026-10-05, 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).