component
XL9027
Public Made by Adomby adom
XLSEMI DC-DC Converters, TO-263-7L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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XL9027
XLSEMI · DC-DC Converters · TO-263-7L
XL9027 from XLSEMI, in a TO-263-7L. 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 | CSP | input | Positive current-sense input used for the constant-current loop (absolute maximum -0.3V to VIN). |
| 2 | CSN | input | Negative current-sense input used for the constant-current loop (absolute maximum -0.3V to VIN). |
| 3 | GND | power_in | Ground pin. |
| 4 | SW | output | Power switch output and switching node of the output power stage (absolute maximum -0.3V to VIN). |
| 5 | FB | input | Feedback input that senses the output voltage through an external resistor divider, with a 1.25V reference voltage. |
| 6 | VC | passive | Internal voltage regulator bypass capacitor pin, requiring a 1uF capacitor connected between VIN and VC. |
| 7 | VIN | power_in | Power supply input supporting a 5V to 45V DC operating range, requiring an electrolytic capacitor between VIN and GND to suppress noise. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| Package | TO-263-7L |
| Category | Power Management (PMIC) |
| Pins | 7 |
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 | 1.225 | 1.25 | 1.275 | V | VIN=12V, VOUT=5.0V, IOUT=0.5A | 4 |
| Operating voltage | VIN | 5 | 45 | V | TA=25C, VIN=12V | 4 | |
| Quiescent current | IQ | 2.3 | 5 | mA | VFB=2V | 4 | |
| Oscillation frequency | FOSC | 96 | 120 | 144 | KHz | 4 | |
| Input voltage (absolute maximum) | VIN | -0.3 | 50 | V | 3 | ||
| VC pin voltage | VC | -0.3 | V | -0.3 to VIN | 3 | ||
| CSP pin voltage | VCSP | -0.3 | V | -0.3 to VIN | 3 | ||
| CSN pin voltage | VCSN | -0.3 | V | -0.3 to VIN | 3 | ||
| Feedback pin voltage | VFB | -0.3 | 7 | V | 3 | ||
| SW pin voltage | VSW | -0.3 | V | -0.3 to VIN | 3 | ||
| Operating junction temperature | TJ | -40 | 150 | oC | 3 | ||
| Storage temperature range | TSTG | -65 | 150 | oC | 3 | ||
| Lead temperature | TLEAD | 260 | oC | soldering 10 s | 3 | ||
| ESD (HBM) | 6000 | V | >6000 | 3 | |||
| Recommended input voltage | VIN | 5 | 45 | V | 1 | ||
| Ambient operating temperature | TA | -40 | 125 | ℃ | Grade 1 | 1 | |
| Output voltage range | VOUT | 1.25 | 40 | V | 1 | ||
| Thermal resistance junction to ambient | RθJA | 30 | oC/W | TO263-7L, no external heatsink | 3 | ||
| Switch current limit | IL | 4 | A | VFB=0V | 4 | ||
| High-side on resistance | RDS(ON)H | 68 | mΩ | 4 | |||
| Low-side on resistance | RDS(ON)L | 50 | mΩ | 4 | |||
| Thermal shutdown temperature | TSD | 170 | ℃ | 4 | |||
| Thermal shutdown hysteresis | TD | 50 | ℃ | 4 | |||
| Maximum duty cycle | DMAX | 100 | % | 4 | |||
| Efficiency | η | 94.2 | % | VIN=12V, VOUT=5.0V, IOUT=1.0A | 4 | ||
| Efficiency | η | 96 | % | VIN=24V, VOUT=12V, IOUT=1.5A | 4 |
CAD (KiCad official)
- Symbol:
XL9027 - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin4 - 3D model: TO-263-7L (KiCad packages3D, STEP)
- 3D model files:
xl9027-etched.step/xl9027-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xl9027.step/xl9027.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XLSEMI datasheet (14 pp, sha256
72b89914c33c4eeb, retrieved 2026-10-26, tier: manufacturer) - 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-sonnet-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).
# XL9027
**XLSEMI** · DC-DC Converters · TO-263-7L
XL9027 from XLSEMI, in a TO-263-7L. 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 | CSP | input | Positive current-sense input used for the constant-current loop (absolute maximum -0.3V to VIN). |
| 2 | CSN | input | Negative current-sense input used for the constant-current loop (absolute maximum -0.3V to VIN). |
| 3 | GND | power_in | Ground pin. |
| 4 | SW | output | Power switch output and switching node of the output power stage (absolute maximum -0.3V to VIN). |
| 5 | FB | input | Feedback input that senses the output voltage through an external resistor divider, with a 1.25V reference voltage. |
| 6 | VC | passive | Internal voltage regulator bypass capacitor pin, requiring a 1uF capacitor connected between VIN and VC. |
| 7 | VIN | power_in | Power supply input supporting a 5V to 45V DC operating range, requiring an electrolytic capacitor between VIN and GND to suppress noise. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| Package | TO-263-7L |
| Category | Power Management (PMIC) |
| Pins | 7 |
## 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 | 1.225 | 1.25 | 1.275 | V | VIN=12V, VOUT=5.0V, IOUT=0.5A | 4 |
| Operating voltage | VIN | 5 | | 45 | V | TA=25C, VIN=12V | 4 |
| Quiescent current | IQ | | 2.3 | 5 | mA | VFB=2V | 4 |
| Oscillation frequency | FOSC | 96 | 120 | 144 | KHz | | 4 |
| Input voltage (absolute maximum) | VIN | -0.3 | | 50 | V | | 3 |
| VC pin voltage | VC | -0.3 | | | V | -0.3 to VIN | 3 |
| CSP pin voltage | VCSP | -0.3 | | | V | -0.3 to VIN | 3 |
| CSN pin voltage | VCSN | -0.3 | | | V | -0.3 to VIN | 3 |
| Feedback pin voltage | VFB | -0.3 | | 7 | V | | 3 |
| SW pin voltage | VSW | -0.3 | | | V | -0.3 to VIN | 3 |
| Operating junction temperature | TJ | -40 | | 150 | oC | | 3 |
| Storage temperature range | TSTG | -65 | | 150 | oC | | 3 |
| Lead temperature | TLEAD | | | 260 | oC | soldering 10 s | 3 |
| ESD (HBM) | | 6000 | | | V | >6000 | 3 |
| Recommended input voltage | VIN | 5 | | 45 | V | | 1 |
| Ambient operating temperature | TA | -40 | | 125 | ℃ | Grade 1 | 1 |
| Output voltage range | VOUT | 1.25 | | 40 | V | | 1 |
| Thermal resistance junction to ambient | RθJA | | 30 | | oC/W | TO263-7L, no external heatsink | 3 |
| Switch current limit | IL | | 4 | | A | VFB=0V | 4 |
| High-side on resistance | RDS(ON)H | | 68 | | mΩ | | 4 |
| Low-side on resistance | RDS(ON)L | | 50 | | mΩ | | 4 |
| Thermal shutdown temperature | TSD | | 170 | | ℃ | | 4 |
| Thermal shutdown hysteresis | TD | | 50 | | ℃ | | 4 |
| Maximum duty cycle | DMAX | | 100 | | % | | 4 |
| Efficiency | η | | 94.2 | | % | VIN=12V, VOUT=5.0V, IOUT=1.0A | 4 |
| Efficiency | η | | 96 | | % | VIN=24V, VOUT=12V, IOUT=1.5A | 4 |
## CAD (KiCad official)
- Symbol: `XL9027`
- Footprint: `Package_TO_SOT_SMD:TO-263-7_TabPin4`
- 3D model: TO-263-7L (KiCad packages3D, STEP)
- 3D model files: `xl9027-etched.step` / `xl9027-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xl9027.step` / `xl9027.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [XLSEMI datasheet](docs/xl9027-datasheet.pdf) (14 pp, sha256 `72b89914c33c4eeb`, retrieved 2026-10-26, tier: manufacturer)
- **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-sonnet-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/xl9027-datasheet.pdf)