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UCC25705DTR

Public Made by Adom

by 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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Generated by kicad-footprint-generator · KiCad file format 20260206
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UCC25705DTR

Texas Instruments · AC-DC Controllers And Regulators · SOIC-8

UCC25705DTR 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 ILIM input Provides a pulse-by-pulse current limit by terminating the PWM pulse when the input is above 200 mV, giving a high-speed reset path of 25 ns typical.
2 FB input Input to the PWM comparator intended to interface with an optocoupler, with 50 kΩ typical input impedance and a 15 V absolute maximum rating.
3 VFF input Feed-forward pin that provides a voltage proportional to the input supply, and both the output and oscillator are disabled when VFF is below 1.0 V; the absolute maximum rating is 7 V.
4 DISCH passive A resistor to VIN sets the oscillator discharge current for the maximum duty cycle, which must be between 25 µA and 250 µA over the entire VIN range; grounding this pin disables the duty cycle clamp.
5 RC passive Oscillator timing pin connected to CT, where the on-time is set by RT and CT and the off-time by RDISCH and CT when the duty cycle clamp is used.
6 GND power_in Ground return pin for the device, and all voltages are referenced to it.
7 OUT output Drives an external FET driver or other high-impedance circuit and is not intended to directly drive a power MOSFET; the dc output current is rated at ±20 mA absolute maximum.
8 VDD power_in Power supply pin that should be bypassed with a 0.1-µF capacitor for proper operation; the UVLO function provides a low-current startup mode.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: UCC25705DTR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: ucc25705dtr-etched.step / ucc25705dtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ucc25705dtr.step / ucc25705dtr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (23 pp, sha256 121bdd15995942af, retrieved 2026-10-10, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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