# HT1482ARZ

**HTCSEMI** · DC-DC Converters · SOP-8

HT1482ARZ from HTCSEMI, in a SOP-8. 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 | BS | power_out | Bootstrap pin that acts as the positive rail for the high-side switch gate driver, with a 0.01uF capacitor connected between BS and SW. |
| 2 | VIN | power_in | Input supply pin, to be bypassed to GND with a low ESR capacitor; the datasheet specifies an input supply range of 4.5V to 27V. |
| 3 | SW | output | Switch output pin, connected to the switching end of the inductor. |
| 4 | GND | power_in | Ground pin. |
| 5 | FB | input | Feedback input regulated to 0.925V, connected to the resistor divider between output and ground to set the output voltage. |
| 6 | COMP | passive | Compensation pin for the feedback loop, with networks defined in the Stability Compensation section. |
| 7 | EN | input | Enable input that turns the IC on above 2.7V and off below 1.1V; it must not be left open and a 100KΩ pull-up to Vin is recommended for startup. |
| 8 | SS | passive | Soft-start control input where a capacitor from SS to GND sets the soft-start period (0.1uF gives 15ms), and leaving it unconnected disables soft-start. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | VFB | 0.9 | 0.925 | 0.95 | V | 4.5V ≤ VIN ≤ 27V | 4 |
| EN Shutdown Threshold Voltage | VEN | 1.1 | 1.4 | 2 | V | VEN Rising | 4 |
| EN Lockout Threshold Voltage |  | 2.2 | 2.5 | 2.7 | V |  | 4 |
| Input UVLO Threshold Rising | UVLO | 3.8 | 4.05 | 4.4 | V | VEN Rising | 4 |
| Input Supply Voltage |  | 4.5 |  | 27 | V |  | 4 |
| Operating Junction Temperature |  | -20 |  | 125 | °C |  | 4 |
| Input Supply Voltage |  | -0.3 |  | 30 | V |  | 3 |
| SW Voltage |  | -0.3 |  |  | V |  | 3 |
| EN, FB, COMP Voltage |  | -0.3 |  |  | V |  | 3 |
| Maximum Junction Temperature |  |  |  | 150 | °C |  | 3 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 3 |
| Junction to Ambient Thermal Resistance | θJA |  | 87 |  | °C/W | Test on approximately 3 in2 copper area 1oz copper FR4 board | 3 |

## CAD (KiCad official)

- Symbol: `HT1482ARZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ht1482arz-etched.step` / `ht1482arz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht1482arz.step` / `ht1482arz.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/8590208088181026816) (12 pp, sha256 `52e332ba257088b9`, retrieved 2026-10-17, 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/ht1482arz-datasheet.pdf)