component
UCC28C40DGKR
Public Made by Adomby adom
Texas Instruments DC-DC Converters, VSSOP-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
markdownUCC28C40DGKR
Texas Instruments · DC-DC Converters · VSSOP-8
UCC28C40DGKR from Texas Instruments, in a VSSOP-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 | Error amplifier output for compensation; internally current-limited to sink 10mA maximum; can command zero duty cycle by forcing to GND. |
| 2 | FB | input | Inverting input to error amplifier for voltage-feedback loop control; internal noninverting reference trimmed to 2.5V ± 1%. |
| 3 | CS | input | Primary-side current sense input to PWM comparator with 3V/V gain; maximum threshold 0.9V to 1.1V (typical 1V); connect to current sensing resistor. |
| 4 | RT/CT | bidirectional | Fixed frequency oscillator set point; connect timing resistor (RRT) to VREF and timing capacitor (CCT) to GND to program switching frequency from 1kHz to 1MHz. |
| 5 | GND | power_in | Ground return for output driver stage and logic level controller section; separate signal and high-current return paths. |
| 6 | OUT | output | On-chip drive stage output for direct MOSFET gate driving; sources and sinks ±1A peak current; actively held low when VDD is below turn-on threshold. |
| 7 | VDD | power_in | Analog controller power supply input with absolute maximum 20V; requires 0.1µF bypass capacitor directly to GND with minimal trace length. |
| 8 | VREF | power_out | 5V reference output (±1% initial accuracy, ±2% over temperature -40°C to 125°C); provides oscillator charging current; requires 0.1µF ceramic bypass to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC28C40DGKR - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files:
ucc28c40dgkr-etched.step/ucc28c40dgkr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc28c40dgkr.step/ucc28c40dgkr.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 2026-09-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).