component
UCC28C40QDRQ1
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.
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UCC28C40QDRQ1
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UCC28C40QDRQ1 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 output for compensation with internal current limiting; can be forced to GND to command zero duty cycle. |
| 2 | FB | input | Inverting input to error amplifier with noninverting input internally trimmed to 2.5V ±1% for voltage-feedback loop control. |
| 3 | CS | input | Primary-side current sense pin; noninverting input to PWM comparator connected to MOSFET source resistor to terminate OUT switch conduction. |
| 4 | RT/CT | bidirectional | Oscillator timing pin with external timing resistor from VREF and capacitor to GND to set switching frequency up to 1MHz. |
| 5 | GND | power_in | Ground return pin for output driver stage and logic level controller section. |
| 6 | OUT | output | On-chip drive stage output for direct MOSFET driving with ±1A peak current, rail-to-rail voltage swing, and actively held low when VDD below turnon threshold. |
| 7 | VDD | power_in | Analog controller bias power input with maximum supply voltage 20V; total current is sum of quiescent current and average OUT current. |
| 8 | VREF | power_in | 5V reference voltage output with ±1% tolerance for error amplifier and internal circuits; requires minimum 0.1µF ceramic bypass capacitor to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC28C40QDRQ1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ucc28c40qdrq1-etched.step/ucc28c40qdrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc28c40qdrq1.step/ucc28c40qdrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (49 pp, sha256
0ab76ce5a6cf1522, retrieved 2026-10-07, 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).
# UCC28C40QDRQ1
**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-8
UCC28C40QDRQ1 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 output for compensation with internal current limiting; can be forced to GND to command zero duty cycle. |
| 2 | FB | input | Inverting input to error amplifier with noninverting input internally trimmed to 2.5V ±1% for voltage-feedback loop control. |
| 3 | CS | input | Primary-side current sense pin; noninverting input to PWM comparator connected to MOSFET source resistor to terminate OUT switch conduction. |
| 4 | RT/CT | bidirectional | Oscillator timing pin with external timing resistor from VREF and capacitor to GND to set switching frequency up to 1MHz. |
| 5 | GND | power_in | Ground return pin for output driver stage and logic level controller section. |
| 6 | OUT | output | On-chip drive stage output for direct MOSFET driving with ±1A peak current, rail-to-rail voltage swing, and actively held low when VDD below turnon threshold. |
| 7 | VDD | power_in | Analog controller bias power input with maximum supply voltage 20V; total current is sum of quiescent current and average OUT current. |
| 8 | VREF | power_in | 5V reference voltage output with ±1% tolerance for error amplifier and internal circuits; requires minimum 0.1µF ceramic bypass capacitor to GND. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
## CAD (KiCad official)
- Symbol: `UCC28C40QDRQ1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ucc28c40qdrq1-etched.step` / `ucc28c40qdrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc28c40qdrq1.step` / `ucc28c40qdrq1.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/ucc28c44-q1) (49 pp, sha256 `0ab76ce5a6cf1522`, retrieved 2026-10-07, 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-4-5-20251001` (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/ucc28c40qdrq1-datasheet.pdf)