# TPS3809K33QDBVRQ1

**Texas Instruments** · Supervisor And Reset ICs · SOT-23-3L

TPS3809K33QDBVRQ1 from Texas Instruments, in a SOT-23-3L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Device ground reference. Connect to system ground (0 V). |
| 2 | RESET | output | Active-low push-pull reset output. Driven low when VDD falls below VIT- (2.93 V typ for K33 option); remains low for td = 200 ms (typ) after VDD returns above the threshold. IOL up to 4 mA at VDD = 6 V; IOH up to -4 mA. Output behavior is undefined for VDD < 1.1 V. |
| 3 | VDD | power_in | Supply voltage and supervising input. Recommended operating range 2 V to 6 V (absolute max 6.5 V). Also the monitored rail: when VDD drops below VIT- (2.93 V typ), RESET is asserted low. Bypass with a 0.1 µF ceramic capacitor placed near the pin for threshold stability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3L |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `TPS3809K33QDBVRQ1`

## CAD (KiCad official)

- Symbol: `TPS3809K33QDBVRQ1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `tps3809k33qdbvrq1-etched.step` / `tps3809k33qdbvrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps3809k33qdbvrq1.step` / `tps3809k33qdbvrq1.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/tps3809-q1) (21 pp, sha256 `d55bc17b31579792`, retrieved 2026-08-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/tps3809k33qdbvrq1-datasheet.pdf)