component
UCC28C42DGKR
Public Made by Adomby adom
Texas Instruments DC-DC Controllers, VSSOP-8-0.65mm. 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
markdownUCC28C42DGKR
Texas Instruments · DC-DC Controllers · VSSOP-8-0.65mm
UCC28C42DGKR from Texas Instruments, in a VSSOP-8-0.65mm. 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 | Output of the error amplifier for loop compensation; the pin can both source and sink current, the error amplifier is internally current limited, and zero duty cycle can be commanded by externally forcing COMP to GND. |
| 2 | FB | input | Inverting input of the error amplifier used to control the voltage-feedback loop, with the noninverting input internally trimmed to 2.5V ±1%. |
| 3 | CS | input | Primary-side current sense input connected to the noninverting input of the PWM comparator, which terminates OUT conduction when the sensed voltage reaches the error amplifier-derived level. |
| 4 | RT/CT | bidirectional | Oscillator set point where timing resistor RRT connects to VREF and timing capacitor CCT connects to GND to set the switching frequency; for UCCx8C42 the gate drive frequency equals fOSC. |
| 5 | GND | power_in | Ground return pin for the output driver stage and the logic-level controller section. |
| 6 | OUT | output | Output of the on-chip totem-pole drive stage intended to directly drive a MOSFET, sourcing and sinking peak currents up to 1A; for UCCx8C42 it switches at the oscillator frequency, can operate near 100% duty cycle, and is held low when VDD is below the turn-on threshold. |
| 7 | VDD | power_in | Analog controller bias supply input with an absolute maximum of 20V, requiring a ceramic bypass capacitor (typically 0.1µF) connected directly to GND; total VDD current is the quiescent current plus the average OUT current. |
| 8 | VREF | power_out | 5V reference output with ±1% tolerance that requires a ceramic bypass of at least 0.1µF to GND placed as close to the pin as possible, and a short-circuit current of 55mA maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | Power Supply Chip |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC28C42DGKR - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files:
ucc28c42dgkr-etched.step/ucc28c42dgkr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc28c42dgkr.step/ucc28c42dgkr.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 2026-10-11, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(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).