component
UCC25705DTR
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.
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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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc25705dtr.step/ucc25705dtr.glbare 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, 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).
# 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](https://www.ti.com/cn/lit/gpn/ucc25705) (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](docs/ucc25705dtr-datasheet.pdf)