# HT1541ARTZ

**HTCSEMI** · DC-DC Converters · SOT-23-5

HT1541ARTZ from HTCSEMI, in a SOT-23-5. 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 | SW | output | Power switch output, the drain of the internal MOSFET, to which the power inductor and output rectifier connect; SW can swing between GND and 22V (absolute maximum on the SW pin is 25V). |
| 2 | GND | power_in | Ground reference pin; the ground returns of C1 and C2 should be tied close to this pin. |
| 3 | FB | input | Feedback input regulated to 1.25V (1.21V to 1.29V); a resistor divider sets the output voltage, with a 47kΩ to 100kΩ series resistor recommended in series with the FB pin. |
| 4 | EN | input | Regulator on/off control input where a high level enables the converter and a low level disables it, and the pin must not be left floating (it can be tied to IN for automatic startup). |
| 5 | IN | power_in | Input supply pin with a 2.5V to 6V operating range that must be locally bypassed, using a ceramic input capacitor of 4.7µF or greater placed close to the pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `HT1541ARTZ`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ht1541artz-etched.step` / `ht1541artz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht1541artz.step` / `ht1541artz.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTCSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588946958009946112) (10 pp, sha256 `cad8acb1fd691e8b`, retrieved 2026-10-12, 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/ht1541artz-datasheet.pdf)