component
UCC38C40DR
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
markdownUCC38C40DR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UCC38C40DR 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 | Error amplifier compensation output; internally current-limited and can be forced to GND to command zero duty cycle. |
| 2 | FB | input | Inverting input to error amplifier for feedback loop stability; compared against 2.5V ± 1% internally-trimmed noninverting input. |
| 3 | CS | input | Current sense input to PWM comparator; signal compared to error amplifier output to control switch conduction. |
| 4 | RT/CT | bidirectional | Oscillator timing node; connect timing resistor to VREF and timing capacitor to GND to set switching frequency. |
| 5 | GND | power_in | Ground return pin for output driver stage and logic level controller section. |
| 6 | OUT | output | Gate driver output capable of sourcing and sinking 1A peak current; actively held low when VDD is below turn-on threshold. |
| 7 | VDD | power_in | Analog controller bias and power input requiring 0.1µF bypass capacitor to GND with minimal trace length. |
| 8 | VREF | power_out | 5V reference voltage output with ±1% accuracy for oscillator timing and internal biasing; requires 0.1µF ceramic bypass to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC38C40DR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ucc38c40dr-etched.step/ucc38c40dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc38c40dr.step/ucc38c40dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (60 pp, sha256
9fa55f996731c56b, retrieved 2026-10-07, tier: manufacturer) - 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).