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UM15428S

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Union Semiconductor Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsum15428sfactory-2.0.0extractor-text

Verified UM15428S

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 5 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: UM15428S · SOT-23-5 · 5 pins
  • ✓copper: 5 copper pads, none touching another net
  • ✓datasheet: all 5 pin names found in the 17-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOT-23-5
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-4dbgz2vl/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 5 pins = 5 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 5 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ um15428s.kicad_sym✓ um15428s.kicad_mod✓ um15428s.step
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Contents

README

markdown

UM15428S

Union Semiconductor · Linear Voltage Regulators (LDO) · SOT-23-5

UM15428S from Union Semiconductor, 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 VIN power_in Power supply input for the regulator, with a recommended supply range of 2.2V to 5.5V and an absolute maximum rating of -0.3V to +6.5V.
2 GND power_in Ground reference pin for the regulator.
3 EN input Active-high enable input that disables the regulator when driven low; VIH is at least 1.0V, VIL is at most 0.4V, and the absolute maximum is -0.3V to +6.5V.
4 NC unconnected Not connected; the datasheet assigns no function to this pin.
5 VOUT power_out Regulated voltage output, rated for 100mA at VIN≥3V and 200mA at VIN≥3.5V, with an absolute maximum rating of -0.3V to +6.5V.

Key specifications

Parameter Value
Manufacturer Union Semiconductor
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 Range VIN 2.2 5.5 V 7
Output Voltage Range VOUT 1.3 5 V 7
Quiescent Current IQ 1.2 3 μA IOUT=0mA,VIN=5.0V 7
Standby Current ISHDN 2 μA VEN=0V 7
Enable High Current IENH 1 μA VEN=5.5V 7
Enable Low Current IENL 1 μA VEN=0V 7
Enable Input High Voltage VIH 1 V 7
Enable Input Low Voltage VIL 0.4 V 7
Output Current IOUT 100 mA VIN≥3V 7
Output Current IOUT 200 mA VIN≥3.5V 7
Output Voltage Accuracy -2 2 % VIN=VOUT+1V (VIN≥3V), 1mA≤IOUT≤30mA 7
Dropout Voltage ΔVDO 0.13 V VOUT≥2.5V, IOUT=30mA 7
Line Regulation -0.5 0.3 0.5 % VOUT+1V≤VIN≤5.5V (VIN≥3V), IOUT=30mA 7
Load Regulation 10 mV VIN=VOUT+1V (VIN≥3V), 1mA≤IOUT≤100mA 7
Current Limit ILIMIT 300 mA 7
Output Voltage TC 150 ppm/°C 7
Thermal-Shutdown Temperature TSHDN 160 °C 7
Thermal-Shutdown Hysteresis ΔTSHDN 20 °C 7
Power Supply Ripple Rejection PSRR 55 dB VIN=VOUT+1V, IOUT=10mA, f=10Hz 7
Power Supply Ripple Rejection PSRR 45 dB VIN=VOUT+1V, IOUT=10mA, f=100Hz 7
Supply Voltage on IN Pin VIN -0.3 6.5 V 6
Voltage on OUT Pin VOUT -0.3 6.5 V 6
Voltage on EN Pin VEN -0.3 6.5 V 6
Operating Junction Temperature TJ -40 125 °C Note 2, 3 6
Storage Temperature Range TSTG -65 150 °C 6
Lead Temperature for Soldering TL 300 °C 10 seconds 6
Supply Input Voltage VIN 2.2 5.5 V 6
Junction Temperature Range TJ -40 125 °C 6
Ambient Temperature Range TA -40 85 °C 6

CAD (KiCad official)

  • Symbol: UM15428S
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: um15428s-etched.step / um15428s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); um15428s.step / um15428s.glb are the bare package body.

Provenance

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

  • Datasheet: Union Semiconductor datasheet (17 pp, sha256 882e5b238ca82024, retrieved 2026-10-30, tier: lcsc)
  • 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