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DS8403-50S5

Public Made by Adom

by adom

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

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DS8403-50S5

DSTECH · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

DS8403-50S5 from DSTECH, 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 Input of supply voltage, recommended range 2.5V to 36V with an absolute maximum of 40V, and a 1µF or larger input capacitor should be placed close to the VIN and GND pins.
2 GND power_in Ground reference pin, to which the input and output capacitor grounds should return through as wide and as short a copper trace as is practical.
3 EN input Enable control input with a rising threshold of 1.1V minimum and a falling threshold of 0.4V maximum; pulling it low shuts the regulator down, and the absolute maximum on this pin is 40V.
4 NC unconnected No internal connection on the fixed-output DS8403-AABB SOT-23-5 package (the SNS sense function is only on the DS8403N variant).
5 VOUT power_out Output of the regulator, fixed at 5.0V for the -50 option, with an absolute maximum of 14V to GND and a ceramic output capacitor between 1µF and 22µF with at least 1mΩ ESR placed close to the VOUT and GND pins.

Key specifications

Parameter Value
Manufacturer DSTECH
Package SOT-23-5
Category Power Management (PMIC)
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
Supply Voltage VIN 2.5 40 V 6
DC Output Voltage Accuracy -1 1 % ILOAD =0.1mA 6
Dropout Voltage VDROP 0.35 V ILOAD =100mA; VOUT >= 5V 6
Shutdown Ground Current ISD 0.1 0.5 uA VEN = 0V, VOUT = 0V 6
EN Input Current IEN 10 100 nA VEN = 24V 6
Line Regulation DLINE 0.8 % ILOAD =1mA, 10V <= VIN <= 20V 6
Output Current Limit ILIM 501 700 mA VOUT =0 6
Input Voltage VIN, EN to GND -0.3 40 V 5
VOUT to GND -0.3 14 V 5
VOUT to VIN -45 0.3 V 5
Junction Temperature 150 degC 5
Storage Temperature Range -40 150 degC 5
ESD Susceptibility HBM 2 KV 5
ESD Susceptibility MM 200 V 5
Input Voltage VIN VIN 2.5 36 V 5
Junction Temperature Range -40 125 degC 5
Ambient Temperature Range -40 85 degC 5
Ground Current IQ 2 uA ILOAD = 0mA; VOUT <= 5V 6
Enable Threshold Voltage (rising) VIH 1.1 V EN Rising 6
Enable Threshold Voltage (falling) VIL 0.4 V EN Falling 6
Load Regulation DLOAD 0.5 % 10mA <= ILOAD <= 0.1A 6
Thermal Shutdown Temperature TSD 160 degC ILOAD =10mA 6
Thermal Shutdown Hysteresis DTSD 30 degC 6
Package Thermal Resistance, SOT-23-5 junction-to-ambient thetaJA 220 degC/W TA=25 degC, DSTECH EVB board 5

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper must be back to the DS8403 ground pin using as wide and as short of a copper trace as is practical. 10

CAD (KiCad official)

  • Symbol: DS8403-50S5
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ds8403-50s5-etched.step / ds8403-50s5-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ds8403-50s5.step / ds8403-50s5.glb are the bare package body.

Provenance

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

  • Datasheet: DSTECH datasheet (12 pp, sha256 f2a7ea1ae70f9ad0, retrieved 2026-10-18, 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