# UCC27511

**Texas Instruments** · Gate driver · SOT-23-6

Drives the gate of a power MOSFET or IGBT from a logic signal, sourcing 4 A and sinking 8 A to switch it quickly and cut switching loss. Separate OUTH and OUTL pins let a resistor set the turn-on and turn-off speeds independently, and the inputs are TTL/CMOS compatible with hysteresis and an inverting option (IN-, IN+). Propagation delay is about 13 ns. A small, fast low-side driver for switch-mode supplies and motor stages.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Bias supply input. Operating range 4.5 V to 18 V. Internal UVLO holds outputs low outside operating range. |
| 2 | OUTH | output | Sourcing current output of driver (4-A peak source). Connect a resistor between OUTH and the gate of the power-switching device to adjust turn-on speed. |
| 3 | OUTL | output | Sinking current output of driver (8-A peak sink). Connect a resistor between OUTL and the gate of the power-switching device to adjust turn-off speed. Low pulldown impedance ~0.375 Ω. |
| 4 | GND | power_in | Ground reference. All signals referenced to this pin. |
| 5 | IN- | input | Inverting input. When the driver is used in noninverting configuration, connect IN- to GND to enable the output. Output is held LOW if IN- is unbiased or floating (internal pullup/pulldown). |
| 6 | IN+ | input | Noninverting input. When the driver is used in inverting configuration, connect IN+ to VDD to enable the output. Output is held LOW if IN+ is unbiased or floating (internal pullup/pulldown). |

## Key specifications

| Parameter | Value |
|---|---|
| Type | Single low-side gate driver |
| Peak source | 4 A |
| Peak sink | 8 A |
| Outputs | Split OUTH / OUTL (independent R) |
| Inputs | TTL/CMOS, dual (IN+, IN-) |
| Propagation delay | ~13 ns |
| Supply | 4.5-18 V |
| Package | SOT-23-6 |

## Ordering variants

Same part, different packaging or reel option.

- `UCC27511DBVR (SOT-23-6, tape & reel)`
- `UCC27511ADBVR (SOT-23-6, variant)`

## CAD (KiCad official)

- Symbol: `Driver_FET:UCC27511ADBV (KiCad official)`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ucc27511-etched.step` / `ucc27511-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc27511.step` / `ucc27511.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/lit/ds/symlink/ucc27511.pdf) (40 pp, sha256 `781cc451dbb371a4`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ucc27511-datasheet.pdf)