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QX2303L50F

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QX Micro Devices DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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QX2303L50F

QX Micro Devices · DC-DC Converters · SOT-23-5

QX2303L50F from QX Micro Devices, in a SOT-23-5. 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 EN input Chip enable, active high; a low level (below 0.2 V) puts the chip in shutdown with standby input current of 1 uA max, high level is at least 0.4*VOUT, and the voltage range is -0.3 V to VOUT+0.3 V.
2 VOUT power_in Input voltage pin per the pin table (boost output/supply node, 5.0 V for this QX2303L50F option); absolute maximum 7 V.
3 NC unconnected Not connected internally on the QX2303LXXF SOT23-5 version; leave floating.
4 GND power_in Power ground.
5 LX output Switching signal output to the inductor from the internal MOS switch; maximum LX current 1000 mA, maximum voltage 7 V, typical current limit 800 mA.

Key specifications

Parameter Value
Manufacturer QX Micro Devices
Package SOT-23-5
Category Power Management ICs
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
Input voltage VINMAX 0.7 V 6
Current limit ILIMIT 600 800 1000 mA 6
Output voltage accuracy ΔVOUT -2.5 2.5 % 6
Standby input current IINQ 1 uA no load, EN low 6
EN low voltage 0.2 V 6
EN high input current 0.1 uA 6
EN low input current -0.1 uA 6
Maximum voltage at VOUT and LX VMAX 7 V 5
EN pin voltage range VMIN_MAX -0.3 V upper limit VOUT+0.3 5
Maximum LX current ILX_MAX 1000 mA 5
SOT-23-5 maximum power dissipation PSOT-23-5 0.25 W 5
Operating temperature range TA -20 85 °C 5
Storage temperature range TSTG -40 125 °C 5
Soldering temperature TSD 230 240 °C time less than 30 s 5
ESD voltage (HBM) VESD 2000 V human body model 5
Output voltage temperature coefficient 100 ppm/°C printed as less than 100 ppm/°C 8
Start-up voltage VSTART 0.8 V ILOAD=1mA, VIN from 0V to 2V 6
Hold voltage VHOLD 0.6 V ILOAD=1mA, VIN from 2V to 0V 6
No-load input current IIN0 15 uA VIN=1.8V, VOUT=3.3V 6
Maximum oscillation frequency FMAX 300 KHz 6
Maximum duty cycle DCOSC 83 % 6

CAD (KiCad official)

  • Symbol: QX2303L50F
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: qx2303l50f-etched.step / qx2303l50f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); qx2303l50f.step / qx2303l50f.glb are the bare package body.

Provenance

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

  • Datasheet: QX Micro Devices datasheet (14 pp, sha256 80cb4ae49c2e83f6, retrieved 2026-10-22, 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-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