component
DS8403-33S5
Public Made by Adomby 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.
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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Contents
README
markdownDS8403-33S5
DSTECH · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
DS8403-33S5 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 and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Input of supply voltage, specified from 2.5V to 40V in the electrical characteristics, with a 1uF or larger input capacitor placed close to the VIN and GND pins. |
| 2 | GND | power_in | Ground reference for the regulator; input and output capacitor grounds must return to this pin through as wide and short a copper trace as practical. |
| 3 | EN | input | Enable control input; pulling EN low shuts the regulator down with a typical shutdown current of 100nA, with VIH 1.1V rising and VIL 0.4V falling thresholds. |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Output of the regulator, fixed at 3.3V for this variant; stable with a ceramic or tantalum output capacitor of 1uF to 22uF with minimum 1mOhm ESR, placed close to VOUT and GND. |
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 | ||
| Output Current Limit | ILIM | 501 | 700 | mA | VOUT =0 | 6 | |
| Line Regulation | ΔLINE | 0.8 | % | ILOAD =1mA, 10V ≤ VIN ≤ 20V | 6 | ||
| Shutdown Ground Current | ISD | 0.1 | 0.5 | μA | VEN = 0V, VOUT = 0V | 6 | |
| EN Input Current | IEN | 10 | 100 | nA | VEN = 24V | 6 | |
| Absolute max: VIN, EN to GND | -0.3 | 40 | V | 5 | |||
| Absolute max: VOUT to GND | -0.3 | 14 | V | 5 | |||
| Absolute max: VOUT to VIN | -45 | 0.3 | V | 5 | |||
| Junction Temperature | 150 | °C | 5 | ||||
| Storage Temperature Range | -40 | 150 | °C | 5 | |||
| ESD Susceptibility HBM | 2 | KV | 5 | ||||
| ESD Susceptibility MM | 200 | V | 5 | ||||
| Input Voltage VIN (recommended) | VIN | 2.5 | 36 | V | 5 | ||
| Junction Temperature Range (recommended) | TJ | -40 | 125 | °C | 5 | ||
| Ambient Temperature Range (recommended) | TA | -40 | 85 | °C | 5 | ||
| Dropout Voltage (3.3V output) | VDROP_3.3V | 0.38 | V | ILOAD =100mA; VOUT = 3.3V | 6 | ||
| Ground Current | IQ | 2 | μA | 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 | ΔLOAD | 0.5 | % | 10mA≤ ILOAD ≤ 0.1A | 6 | ||
| Power Supply Rejection Ratio | PSRR | 70 | dB | VOUT =3.3V, ILOAD =30mA, VIN = 12V, f = 1KHz | 6 | ||
| Thermal Shutdown Hysteresis | ΔTSD | 30 | °C | 6 | |||
| Thermal Shutdown Temperature | TSD | 160 | °C | ILOAD =10mA | 6 | ||
| Package Thermal Resistance SOT-23-5 | θJA | 220 | °C/W | Note 2: TA = 25°C, 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 (land: KiCad; 3D: generated from the datasheet)
- Symbol:
DS8403-33S5 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5, generated on the KiCad land (body 1.6 x 2.896 mm, terminals on the pads, 1.092 mm tall, datasheet A, midpoint of min and max). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files:
ds8403-33s5-etched.step/ds8403-33s5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ds8403-33s5.step/ds8403-33s5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DSTECH datasheet (12 pp, sha256
f2a7ea1ae70f9ad0, retrieved 2026-11-12, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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: land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).