# HT6908ARTZ

**HTCSEMI** · Synchronous Rectifier Controllers · SOT-23-6

HT6908ARTZ from HTCSEMI, 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 | HVC | power_in | High-voltage linear regulator input. Accepts up to +180 V (abs max) referenced to VSS and supplies the internal VDD charge path (70 mA current source, clamped to 9 V when V_HVC > 9.7 V). Can be tied to VD or VSS depending on high-side/low-side configuration. |
| 2 | VSS | power_in | Device ground. Also used as the MOSFET source sense reference for the VD forward-voltage measurement. |
| 3 | SLEW | input | Programming pin for turn-on signal slew-rate detection. An external resistor R_SLEW (e.g., 400 kΩ) to VSS sets the slew-rate detection timer T_SLEW ≈ R_SLEW × 90 ns / 400 kΩ, which prevents false turn-on from ringing during DCM and quasi-resonant operation. |
| 4 | VDD | power_out | Linear regulator output and IC supply. Operating range 4 V to 13 V (recommended); regulated to ~5 V when charged from VD (V_HVC < 4.7 V) or ~9 V when charged from HVC. Requires an external hold-up capacitor (VDD UVLO rising 3.75 V typ). |
| 5 | VG | output | Gate drive output for the external synchronous-rectifier MOSFET. Drives standard and logic-level SR MOSFETs with ~0.5 A source / 3 A sink capability, V_G-H ≥ 4.9 V, pull-down impedance ~1 Ω. Turn-on/turn-off delays ~30 ns / 25 ns. |
| 6 | VD | input | MOSFET drain voltage sense. Measures V_DS of the external SR MOSFET (up to +150 V recommended, +180 V abs max relative to VSS) to control gate on/off: turn-on threshold V_DS = -86 mV typ, turn-off threshold VSS-VD = 3 mV typ, forward regulation ~40 mV. |

## Key specifications

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

## Ordering variants

Same part, different packaging or reel option.

- `HT6908ARTZ`
- `HT6908ARTZARDZ`

## CAD (KiCad official)

- Symbol: `HT6908ARTZ`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ht6908artz-etched.step` / `ht6908artz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht6908artz.step` / `ht6908artz.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HTCSEMI datasheet](docs/ht6908artz-datasheet.pdf) (13 pp, sha256 `17cc1da9c3621e09`, retrieved 2026-08-17, tier: lcsc)
- **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/ht6908artz-datasheet.pdf)