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XL1509A-12E1
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XLSEMI(芯龙) DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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XL1509A-12E1
XLSEMI(芯龙) · DC-DC Converters · SOP-8
XL1509A-12E1 from XLSEMI(芯龙), 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 | VIN | power_in | Power supply input pin, supporting a DC 4.5V to 50V wide operating voltage range; an electrolytic capacitor must be connected in parallel between VIN and GND to eliminate noise. |
| 2 | SW | output | Power switch output pin; SW is the switching node of the output power, with VSW limited to -0.3V to VIN per the absolute maximum ratings. |
| 3 | FB | input | Feedback pin that senses the output voltage through an external resistor divider to regulate it; the reference voltage is 1.23V for the adjustable version. |
| 4 | EN | input | Enable pin, active low: a low level turns the device on and a high level (above 1.4V) shuts it down, and it is pulled low when left floating. |
| 5 | GND | power_in | Ground pin. |
| 6 | GND | power_in | Ground pin. |
| 7 | GND | power_in | Ground pin. |
| 8 | GND | power_in | Ground pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI(芯龙) |
| 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 |
|---|---|---|---|---|---|---|---|
| 输出电压 | VOUT | 11.82 | 12 | 12.18 | V | VIN =24V IOUT=0.25A | 4 |
| 工作电压 | VIN | 4.5 | 50 | V | 5 | ||
| 振荡频率 | FOSC | 135 | 150 | 165 | KHz | 5 | |
| 关机电流 | IS | 46 | 100 | uA | VEN =2V | 5 | |
| 静态电流 | IQ | 1.3 | 2 | mA | 注 2: 12V版本 VFB=15V | 5 | |
| EN引脚阈值电压 高电平（关断） | VEN_H | 1.4 | V | 高电平（关断） | 5 | ||
| EN引脚阈值电压 低电平（开启） | VEN_L | 0.8 | V | 低电平（开启） | 5 | ||
| 饱和压降 | VCE | 1.1 | 1.3 | V | VFB=0V IOUT=2A | 5 | |
| 最大占空比 | DMAX | 100 | % | VFB=0V | 5 | ||
| 输入电压 | VIN | -0.3 | 60 | V | 3 | ||
| 反馈引脚电压 | VFB | -0.3 | 20 | V | 3 | ||
| 使能引脚电压 | VEN | -0.3 | 7 | V | 3 | ||
| 输出开关引脚电压 | VSW | -0.3 | V | max printed as VIN | 3 | ||
| 操作结温 | TJ | -40 | 150 | oC | 3 | ||
| 贮存温度范围 | TSTG | -65 | 150 | oC | 3 | ||
| 引脚温度(焊接10秒) | TLEAD | 260 | oC | 焊接10秒 | 3 | ||
| ESD (HBM) | ESD | 8000 | V | HBM; printed as >8000 | 3 | ||
| 开关电流限值 | IL | 3 | A | VFB =0V | 5 | ||
| EN引脚电流 | IEN | 5 | uA | VEN =2.0V | 5 | ||
| 热关断温度 | TSD | 180 | ℃ | 5 | |||
| 热关断迟滞 | TD | 50 | ℃ | 5 | |||
| 热阻 (SOP8) 结到环境 | RJA | 100 | oC /W | 结到环境，无外部散热片 | 3 |
CAD (KiCad official)
- Symbol:
XL1509A-12E1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
xl1509a-12e1-etched.step/xl1509a-12e1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xl1509a-12e1.step/xl1509a-12e1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XLSEMI(芯龙) datasheet (17 pp, sha256
a4865b1dcf3ac763, retrieved 2026-10-17, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).
# XL1509A-12E1
**XLSEMI(芯龙)** · DC-DC Converters · SOP-8
XL1509A-12E1 from XLSEMI(芯龙), 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 | VIN | power_in | Power supply input pin, supporting a DC 4.5V to 50V wide operating voltage range; an electrolytic capacitor must be connected in parallel between VIN and GND to eliminate noise. |
| 2 | SW | output | Power switch output pin; SW is the switching node of the output power, with VSW limited to -0.3V to VIN per the absolute maximum ratings. |
| 3 | FB | input | Feedback pin that senses the output voltage through an external resistor divider to regulate it; the reference voltage is 1.23V for the adjustable version. |
| 4 | EN | input | Enable pin, active low: a low level turns the device on and a high level (above 1.4V) shuts it down, and it is pulled low when left floating. |
| 5 | GND | power_in | Ground pin. |
| 6 | GND | power_in | Ground pin. |
| 7 | GND | power_in | Ground pin. |
| 8 | GND | power_in | Ground pin. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI(芯龙) |
| 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 |
|---|---|---|---|---|---|---|---|
| 输出电压 | VOUT | 11.82 | 12 | 12.18 | V | VIN =24V IOUT=0.25A | 4 |
| 工作电压 | VIN | 4.5 | | 50 | V | | 5 |
| 振荡频率 | FOSC | 135 | 150 | 165 | KHz | | 5 |
| 关机电流 | IS | | 46 | 100 | uA | VEN =2V | 5 |
| 静态电流 | IQ | | 1.3 | 2 | mA | 注 2: 12V版本 VFB=15V | 5 |
| EN引脚阈值电压 高电平（关断） | VEN_H | 1.4 | | | V | 高电平（关断） | 5 |
| EN引脚阈值电压 低电平（开启） | VEN_L | | | 0.8 | V | 低电平（开启） | 5 |
| 饱和压降 | VCE | | 1.1 | 1.3 | V | VFB=0V IOUT=2A | 5 |
| 最大占空比 | DMAX | | | 100 | % | VFB=0V | 5 |
| 输入电压 | VIN | -0.3 | | 60 | V | | 3 |
| 反馈引脚电压 | VFB | -0.3 | | 20 | V | | 3 |
| 使能引脚电压 | VEN | -0.3 | | 7 | V | | 3 |
| 输出开关引脚电压 | VSW | -0.3 | | | V | max printed as VIN | 3 |
| 操作结温 | TJ | -40 | | 150 | oC | | 3 |
| 贮存温度范围 | TSTG | -65 | | 150 | oC | | 3 |
| 引脚温度(焊接10秒) | TLEAD | | | 260 | oC | 焊接10秒 | 3 |
| ESD (HBM) | ESD | 8000 | | | V | HBM; printed as >8000 | 3 |
| 开关电流限值 | IL | | 3 | | A | VFB =0V | 5 |
| EN引脚电流 | IEN | | 5 | | uA | VEN =2.0V | 5 |
| 热关断温度 | TSD | | 180 | | ℃ | | 5 |
| 热关断迟滞 | TD | | 50 | | ℃ | | 5 |
| 热阻 (SOP8) 结到环境 | RJA | | 100 | | oC /W | 结到环境，无外部散热片 | 3 |
## CAD (KiCad official)
- Symbol: `XL1509A-12E1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `xl1509a-12e1-etched.step` / `xl1509a-12e1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xl1509a-12e1.step` / `xl1509a-12e1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [XLSEMI(芯龙) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8613804065881280512) (17 pp, sha256 `a4865b1dcf3ac763`, retrieved 2026-10-17, 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/xl1509a-12e1-datasheet.pdf)