component
UCC28C57LQDRQ1
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
markdownUCC28C57LQDRQ1
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UCC28C57LQDRQ1 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 | Output of the error amplifier for compensation; internally current limited to allow commanding zero duty cycle by forcing COMP to GND. |
| 2 | FB | input | Inverting input to the error amplifier with noninverting input internally trimmed to 2.5 V ±1% for controlling power converter voltage-feedback loop stability. |
| 3 | CS | input | Primary-side current sense pin and noninverting input to the PWM comparator; receives signal from current sensing resistor and can have voltage ramp applied for voltage mode control. |
| 4 | RT/CT | bidirectional | Fixed frequency oscillator set point where timing resistor connects to VREF and timing capacitor connects to GND to set switching frequency. |
| 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 drive stage intended to directly drive a MOSFET with peak currents up to 1 A; in UCC28C57H/L-Q1 the frequency is one-half the oscillator frequency and maximum duty cycle is limited to less than 50%. |
| 7 | VDD | power_in | Analog controller bias input providing power to the device with maximum absolute voltage rating of 30 V; total VDD current is the sum of quiescent VDD current and average OUT current, requiring bypass capacitor of typically 0.1 µF directly to GND. |
| 8 | VREF | power_in | 5-V reference voltage output used to provide charging current to the oscillator timing capacitor through the timing resistor with ±1% accuracy. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UCC28C57LQDRQ1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ucc28c57lqdrq1-etched.step/ucc28c57lqdrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc28c57lqdrq1.step/ucc28c57lqdrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (54 pp, sha256
17e157e3c78ffd7e, retrieved 2026-10-05, 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).