# SN6505BDBVR

**Texas Instruments** · Transformer Drivers · SOT-23-6

SN6505BDBVR from Texas Instruments, in a SOT-23-6. 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 | D1 | output | Open-drain output of the first internal power MOSFET (~0.25 Ω R_ON at V_CC = 4.5 V, 1 A capable). Typically connected to one outer terminal of the center-tapped transformer primary; keep external traces short due to high current. |
| 2 | VCC | power_in | Device supply pin, 2.25 V to 5.5 V. Bypass with a 4.7 µF or greater low-ESR capacitor. Internal UVLO trips when V_CC ≤ 2.25 V (positive-going) / 1.7 V (negative-going) and turns off both outputs. |
| 3 | D2 | output | Open-drain output of the second internal power MOSFET (~0.25 Ω R_ON at V_CC = 4.5 V, 1 A capable). Typically connected to the other outer terminal of the center-tapped transformer primary; keep external traces short due to high current. |
| 4 | GND | power_in | Device ground; connects to the source of the internal power MOSFETs via an internal current-sense circuit. Must be connected to a low-inductance ground plane because large switching currents flow through it. |
| 5 | EN | input | Enable input. Logic high (V_IH ≥ 0.7 × V_CC) turns the device on; grounding or leaving floating disables all internal circuitry (I_DIS ≈ 0.1 µA). Tie directly to V_CC if unused. |
| 6 | CLK | input | External clock input to synchronize multiple devices. Internally pulled to GND; if no valid external clock is detected within t_CLKTIMER (10-25 µs), the device automatically falls back to its internal oscillator (420 kHz for SN6505B). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## Ordering variants

Same part, different packaging or reel option.

- `SN6505BDBVR`
- `SN6505BDBVRDBVT`

## CAD (KiCad official)

- Symbol: `SN6505BDBVR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `sn6505bdbvr-etched.step` / `sn6505bdbvr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn6505bdbvr.step` / `sn6505bdbvr.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/sn6505b.pdf) (43 pp, sha256 `dfc57cb042218cb6`, 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/sn6505bdbvr-datasheet.pdf)