# XT1861B332SR-G

**NATLINEAR** · DC-DC Converters · SOT-23-5L

XT1861B332SR-G from NATLINEAR, in a SOT-23-5L. 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 | CE | input | Chip enable pin (使能端) that turns the PFM boost converter on and off; the datasheet gives no logic thresholds in text, only a CE high-voltage vs. temperature curve. |
| 2 | VOUT | power_out | Boost converter output; the absolute maximum voltage on VOUT and VLX is 6.5 V. |
| 3 | NC | unconnected | No connection (悬空), leave unconnected. |
| 4 | GND | power_in | Ground pin (接地端) for the converter. |
| 5 | LX | output | Switching node (开关) of the boost converter; the absolute maximum LX current is 1000 mA and the voltage limit is 6.5 V. |

## Key specifications

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

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 输出电压精度 (output voltage accuracy) | ΔVOUT | -2.5 |  | 2.5 | % |  | 4 |
| 最大输入电压 (maximum input voltage) | VINMAX | 0.9 |  | 6.5 | V |  | 4 |
| 启动电压 (start voltage) | VSTART |  |  | 0.8 | V | ILOAD=1mA,VIN:0→2V | 4 |
| 保持电压 (hold voltage) | VHOLD | 0.6 |  |  | V | ILOAD=1mA,VIN:2→0V | 4 |
| 振荡信号占空比 (oscillation signal duty cycle) | DCOSC |  |  | 78 | % |  | 4 |
| 效率 (efficiency) | η |  | 90 | 94 | % |  | 4 |
| 限流 (current limit) | ILIMIT | 600 | 800 | 1000 | mA |  | 4 |
| LX端最大电流 (LX maximum current) | ILXmax |  | 1000 |  | mA |  | 4 |
| 最大功耗 SOT23-5L 封装 (max power dissipation, SOT23-5L) | PD |  | 350 |  | mW | SOT23-5L package | 4 |
| 工作温度范围 (operating temperature range) | Tmin-max | -40 |  | 85 | °C |  | 4 |
| 存储温度范围 (storage temperature range) | Tstorage | -40 |  | 165 | °C |  | 4 |
| 人体静电耐压 (ESD human body model) | VESD |  | 4000 |  | V |  | 4 |
| 供给 VOUT 和 VLX 端的最大电压 (maximum voltage on VOUT and VLX) | Vmax |  | 6.5 |  | V | VOUT and VLX pins | 4 |

## CAD (KiCad official)

- Symbol: `XT1861B332SR-G`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files: `xt1861b332sr-g-etched.step` / `xt1861b332sr-g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xt1861b332sr-g.step` / `xt1861b332sr-g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NATLINEAR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589794677810356224) (12 pp, sha256 `6aefb3994990857c`, retrieved 2026-10-13, 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:** 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/xt1861b332sr-g-datasheet.pdf)