component
UC2875DWPTR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-28-300mil. 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
markdownUC2875DWPTR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-28-300mil
UC2875DWPTR from Texas Instruments, in a SOIC-28-300mil. 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 | VREF | power_out | Accurate 5V reference output delivering about 60mA, short-circuit limited, disabled in UVLO, bypass with a 0.1µF low-ESR capacitor to GND. |
| 2 | E/AOUT | output | Error amplifier output and gain stage for overall feedback control; levels below 1V force 0° phase shift. |
| 3 | EA- | input | Error amplifier inverting input, normally connected to the divider sensing the power supply output voltage. |
| 4 | EA+ | input | Error amplifier non-inverting input, normally connected to a reference voltage for comparison with the sensed output level. |
| 5 | CS+ | input | Non-inverting input of the current-fault comparator with internal 2.5V reference; exceeding 2.5V latches outputs off and starts a soft-start cycle. |
| 6 | SOFTSTART | output | Soft-start pin held at GND while VIN is below UVLO, then pulled up to about 4.8V by an internal 9µA source. |
| 7 | GND | power_in | Signal ground, reference for all voltages. |
| 8 | GND | power_in | Signal ground, reference for all voltages. |
| 9 | GND | power_in | Signal ground, reference for all voltages. |
| 10 | DELAYSET C-D | input | Programmed current from this pin to GND sets the turn-on delay for the C-D output pair. |
| 11 | N/C | unconnected | No connection. |
| 12 | OUTD | output | 2A totem-pole output D, part of the C-D pair driving the second half-bridge phase-shifted from A-B. |
| 13 | OUTC | output | 2A totem-pole output C, part of the C-D pair driving the second half-bridge phase-shifted from A-B. |
| 14 | VC | power_in | Supply for the output drivers; connect to a stable source above 3V (above 12V for best performance), bypassed to PWRGND. |
| 15 | VIN | power_in | Primary chip supply for logic and analog circuitry; connect to a stable source above 12V, inactive until VIN exceeds the UVLO threshold, bypass to GND. |
| 16 | PWRGND | power_in | Power ground for the output drivers; bypass VC to it with a ceramic capacitor, may be joined to signal ground at a single point. |
| 17 | OUTB | output | 2A totem-pole output B, part of the A-B pair driving one half-bridge synchronized with the clock. |
| 18 | OUTA | output | 2A totem-pole output A, part of the A-B pair driving one half-bridge synchronized with the clock. |
| 19 | N/C | unconnected | No connection. |
| 20 | GND | power_in | Signal ground, reference for all voltages. |
| 21 | GND | power_in | Signal ground, reference for all voltages. |
| 22 | GND | power_in | Signal ground, reference for all voltages. |
| 23 | DELAYSET A-B | input | Programmed current from this pin to GND sets the turn-on delay for the A-B output pair. |
| 24 | FREQSET | passive | A resistor and capacitor from this pin to GND set the oscillator frequency. |
| 25 | CLOCKSYNC | bidirectional | Outputs a clock signal or accepts a synchronization input higher in frequency than the local oscillator. |
| 26 | SLOPE | passive | A resistor from this pin to VCC sets the current used to generate the ramp, giving slope compensation or voltage feed-forward. |
| 27 | RAMP | input | Input to the PWM comparator; connect a capacitor to GND, with 1.3V offset between ramp input and PWM comparator. |
| 28 | GND | power_in | Signal ground, reference for all voltages. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-28-300mil |
| Category | Power Management (PMIC) |
| Pins | 28 |
CAD (KiCad official)
- Symbol:
UC2875DWPTR - Footprint:
Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm - 3D model: SOIC-28-300mil (KiCad packages3D, STEP)
- 3D model files:
uc2875dwptr-etched.step/uc2875dwptr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc2875dwptr.step/uc2875dwptr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
4544bfc895c90421, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-opus-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).