component
XL9021
Public Made by Adomby adom
XLSEMI DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownXL9021
XLSEMI · DC-DC Converters · SOP-8
XL9021 from XLSEMI, 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 | FB | input | Feedback pin that senses the output voltage through an external resistor divider, with a reference voltage of 1.25V. |
| 2 | EN | input | Enable pin, active low (low level runs, high level shuts down, floating is treated as low); VEN_H threshold is 1.4V and VEN_L is 0.8V, absolute maximum -0.3 to 7V. |
| 3 | VC | passive | Bypass capacitor pin for the internal voltage regulator, requiring a 1uF capacitor connected between VIN and VC. |
| 4 | VIN | power_in | Power input pin supporting 5V to 36V operation (absolute maximum 40V), requiring an electrolytic capacitor between VIN and GND to suppress noise. |
| 5 | SW | output | Power switch output pin, the switching node of the output power stage (pins 5 and 6 are both SW). |
| 6 | SW | output | Power switch output pin, the switching node of the output power stage (pins 5 and 6 are both SW). |
| 7 | GND | power_in | Ground pin (pins 7 and 8 are both GND). |
| 8 | GND | power_in | Ground pin (pins 7 and 8 are both GND). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| 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 | 1.225 | 1.25 | 1.275 | V | VIN=12V, VOUT=5.0V, IOUT=0.5A | 4 |
| Operating voltage | VIN | 5 | 36 | V | TA=25℃, VEN=0V | 4 | |
| Oscillation frequency | FOSC | 127 | 150 | 172 | KHz | TA=25℃, VIN=12V, VEN=0V | 4 |
| Shutdown current | IS | 77 | 200 | uA | VEN=2V | 4 | |
| Quiescent current | IQ | 2.5 | 5 | mA | VFB=2V | 4 | |
| Switch current limit | IL | 2.5 | A | VFB=0V | 4 | ||
| EN threshold high (shutdown) | VEN_H | 1.4 | V | 高电平（关断） | 4 | ||
| EN threshold low (on) | VEN_L | 0.8 | V | 低电平（开启） | 4 | ||
| Input voltage | VIN | -0.3 | 40 | V | 3 | ||
| Enable pin voltage | VEN | -0.3 | 7 | V | 3 | ||
| Feedback pin voltage | VFB | -0.3 | 7 | V | 3 | ||
| Output switch pin voltage | VSW | -0.3 | V | max is VIN (printed -0.3~VIN) | 3 | ||
| VC pin voltage | VC | -0.3 | V | max is VIN (printed -0.3~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) | ESD | 8000 | V | HBM, printed >8000 | 3 | ||
| Thermal resistance junction to ambient (SOP8) | RJA | 100 | oC/W | no external heat sink | 3 | ||
| Recommended operating voltage | VIN | 5 | 36 | V | 1 | ||
| Ambient operating temperature (grade 1) | TA | -40 | 125 | ℃ | 1 | ||
| EN pin current | IEN | 5 | uA | VEN=2.0V | 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 | 160 | ℃ | 4 | |||
| Thermal shutdown hysteresis | TD | 30 | ℃ | 4 |
CAD (KiCad official)
- Symbol:
XL9021 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
xl9021-etched.step/xl9021-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xl9021.step/xl9021.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XLSEMI datasheet (15 pp, sha256
e6e400b8c0eefdd7, retrieved 2026-10-23, 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).