component
UCC2818MDREP
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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UCC2818MDREP
Texas Instruments · AC-DC Controllers And Regulators · SOIC-16
UCC2818MDREP from Texas Instruments, in a SOIC-16. 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 | GND | power_in | Ground reference for all voltages; VCC and VREF should be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor. |
| 2 | PKLMT | input | PFC peak current limit threshold is 0 V, reached when the level-shifted input falls below 0 V; absolute maximum input is 5 V and the maximum negative voltage is -0.5 V. |
| 3 | CAOUT | output | Current amplifier output that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT. |
| 4 | CAI | input | Current amplifier noninverting input, connected through a resistor to the GND side of the current sense resistor; it remains functional down to and below GND. |
| 5 | MOUT | input | Multiplier output and current amplifier inverting input, high impedance, with multiplier output current limited to 2 × IIAC; absolute maximum input voltage is 8 V and maximum negative voltage is -0.5 V. |
| 6 | IAC | input | Input current proportional to instantaneous line voltage for the analog multiplier; recommended maximum IIAC is 500 µA and absolute maximum input current is 10 mA. |
| 7 | VAOUT | output | Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |
| 8 | VFF | passive | Feed-forward voltage generated by mirroring one half of IIAC into a single-pole external filter; it should be 1.4 V at low line. |
| 9 | VREF | power_out | Accurate 7.5-V voltage reference output capable of delivering 20 mA to peripheral circuitry, short-circuit current limited, and held at 0 V when VCC is below UVLO; bypass with 0.1 µF or larger ceramic capacitor. |
| 10 | OVP/EN | input | Over-voltage/enable window comparator input that disables the output driver above the programmed level and disables the driver and resets SS below 1.9 V (typ); absolute maximum voltage is 10 V. |
| 11 | VSENSE | input | Voltage amplifier inverting input, connected to the compensation network and to the boost output through a divider; absolute maximum input voltage is 10 V. |
| 12 | RT | passive | Oscillator charging current programming resistor to GND, with 10 kΩ to 100 kΩ recommended and nominal voltage on the pin of 3 V; absolute maximum input current is 10 mA. |
| 13 | SS | bidirectional | Soft-start pin that an external capacitor is charged through a current source, used as the voltage error signal during start-up, and discharged quickly when VCC drops out. |
| 14 | CT | passive | Oscillator timing capacitor to GND that sets the PWM oscillator frequency, with its lead to GND kept as short and direct as possible. |
| 15 | VCC | power_in | Positive supply, connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with absolute maximum supply voltage of 18 V; output devices are inhibited unless VCC exceeds the upper UVLO threshold. |
| 16 | DRVOUT | output | Totem-pole MOSFET gate driver output for the boost switch, which should use a series gate resistor; absolute maximum continuous gate drive current is 0.2 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
UCC2818MDREP - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
ucc2818mdrep-etched.step/ucc2818mdrep-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ucc2818mdrep.step/ucc2818mdrep.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
0b1b2e5d62669f10, retrieved 2026-10-07, 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).
# UCC2818MDREP
**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-16
UCC2818MDREP from Texas Instruments, in a SOIC-16. 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 | GND | power_in | Ground reference for all voltages; VCC and VREF should be bypassed directly to GND with a 0.1-µF or larger ceramic capacitor. |
| 2 | PKLMT | input | PFC peak current limit threshold is 0 V, reached when the level-shifted input falls below 0 V; absolute maximum input is 5 V and the maximum negative voltage is -0.5 V. |
| 3 | CAOUT | output | Current amplifier output that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT. |
| 4 | CAI | input | Current amplifier noninverting input, connected through a resistor to the GND side of the current sense resistor; it remains functional down to and below GND. |
| 5 | MOUT | input | Multiplier output and current amplifier inverting input, high impedance, with multiplier output current limited to 2 × IIAC; absolute maximum input voltage is 8 V and maximum negative voltage is -0.5 V. |
| 6 | IAC | input | Input current proportional to instantaneous line voltage for the analog multiplier; recommended maximum IIAC is 500 µA and absolute maximum input current is 10 mA. |
| 7 | VAOUT | output | Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot. |
| 8 | VFF | passive | Feed-forward voltage generated by mirroring one half of IIAC into a single-pole external filter; it should be 1.4 V at low line. |
| 9 | VREF | power_out | Accurate 7.5-V voltage reference output capable of delivering 20 mA to peripheral circuitry, short-circuit current limited, and held at 0 V when VCC is below UVLO; bypass with 0.1 µF or larger ceramic capacitor. |
| 10 | OVP/EN | input | Over-voltage/enable window comparator input that disables the output driver above the programmed level and disables the driver and resets SS below 1.9 V (typ); absolute maximum voltage is 10 V. |
| 11 | VSENSE | input | Voltage amplifier inverting input, connected to the compensation network and to the boost output through a divider; absolute maximum input voltage is 10 V. |
| 12 | RT | passive | Oscillator charging current programming resistor to GND, with 10 kΩ to 100 kΩ recommended and nominal voltage on the pin of 3 V; absolute maximum input current is 10 mA. |
| 13 | SS | bidirectional | Soft-start pin that an external capacitor is charged through a current source, used as the voltage error signal during start-up, and discharged quickly when VCC drops out. |
| 14 | CT | passive | Oscillator timing capacitor to GND that sets the PWM oscillator frequency, with its lead to GND kept as short and direct as possible. |
| 15 | VCC | power_in | Positive supply, connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with absolute maximum supply voltage of 18 V; output devices are inhibited unless VCC exceeds the upper UVLO threshold. |
| 16 | DRVOUT | output | Totem-pole MOSFET gate driver output for the boost switch, which should use a series gate resistor; absolute maximum continuous gate drive current is 0.2 A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
## CAD (KiCad official)
- Symbol: `UCC2818MDREP`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `ucc2818mdrep-etched.step` / `ucc2818mdrep-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc2818mdrep.step` / `ucc2818mdrep.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/ucc2818-ep) (23 pp, sha256 `0b1b2e5d62669f10`, retrieved 2026-10-07, 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/ucc2818mdrep-datasheet.pdf)