component
AN431AN-ATRG1
Public Made by Adomby adom
Diodes Incorporated Voltage Reference, SOT-23. Pinout extracted from 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
markdownAN431AN-ATRG1
Diodes Incorporated · Voltage Reference · SOT-23
AN431AN-ATRG1 from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CATHODE | input | Cathode (K). Current-sink terminal of the shunt regulator; regulates VKA (VREF≤VKA≤36 V) by sinking 1-100 mA (100 mA continuous max, ±150 mA absolute max). Off-state leakage ≤1 µA at VKA=36 V. |
| 2 | REF | input | Reference input. High-impedance sense pin compared internally against the 2.500 V bandgap reference; drive from an external divider between CATHODE and ANODE to program VKA=VREF·(1+R1/R2). Reference input current ≤4 µA typ, absolute max IREF=10 mA. |
| 3 | ANODE | power_in | Anode (A). Return terminal of the shunt regulator; typically tied to circuit ground. Sinks the combined cathode plus reference-input current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
AN431AN-ATRG1
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reference Voltage (0.5% grade) | VREF | 2.487 | 2.5 | 2.512 | V | VKA=VREF, IKA=10mA | 5 |
| Deviation of Reference Voltage Over 0 to +70°C | ΔVREF | 4.5 | 8 | mV | VKA=VREF, IKA=10mA, 0 to +70°C | 5 | |
| Deviation of Reference Voltage Over -40 to +85°C | ΔVREF | 4.5 | 10 | mV | VKA=VREF, IKA=10mA, -40 to +85°C | 5 | |
| Deviation of Reference Voltage Over -40 to +125°C | ΔVREF | 4.5 | 16 | mV | VKA=VREF, IKA=10mA, -40 to +125°C | 5 | |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (ΔVKA=10V to VREF) | ΔVREF/ΔVKA | -1 | -2.7 | mV/V | IKA=10mA, ΔVKA=10V to VREF | 5 | |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (ΔVKA=36V to 10V) | ΔVREF/ΔVKA | -0.5 | -2 | mV/V | IKA=10mA, ΔVKA=36V to 10V | 5 | |
| Reference Current | IREF | 0.7 | 4 | µA | IKA=10mA, R1=10KΩ, R2=∞ | 5 | |
| Deviation of Reference Current Over Full Temperature Range | ΔIREF | 0.4 | 1.2 | µA | IKA=10mA, R1=10KΩ, R2=∞, TA=-40 to +125°C | 5 | |
| Minimum Cathode Current for Regulation | IKA (Min) | 0.4 | 1 | mA | VKA=VREF | 5 | |
| Off-state Cathode Current | IKA (Off) | 0.05 | 1 | µA | VKA=36V, VREF=0 | 5 | |
| Dynamic Impedance | ZKA | 0.15 | 0.5 | Ω | VKA=VREF, IKA=1 to 100mA, f≤1.0kHz | 5 | |
| Cathode Voltage | VKA | 36 | V | Minimum printed as VREF (not a numeric value) | 4 | ||
| Cathode Current | IKA | 1 | 100 | mA | 4 | ||
| Operating Ambient Temperature Range | TA | -40 | 125 | ºC | 4 | ||
| Cathode Voltage | VKA | 40 | V | 4 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | Continuous | 4 | |
| Reference Input Current Range | IREF | 10 | mA | 4 | |||
| Power Dissipation | PD | 370 | mW | 4 | |||
| Junction Temperature | TJ | 150 | ºC | 4 | |||
| Storage Temperature Range | TSTG | -65 | 150 | ºC | 4 | ||
| ESD (Human Body Model) | ESD | 2000 | V | Human Body Model | 4 | ||
| Thermal Resistance, Junction to Case | θJC | 135 | ºC/W | SOT-23 | 5 |
CAD (KiCad official)
- Symbol:
AN431AN-ATRG1 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
an431an-atrg1-etched.step/an431an-atrg1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);an431an-atrg1.step/an431an-atrg1.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
an431an-atrg1.step |
59 KB | You want the bare part, or you mark your own boards. |
an431an-atrg1-etched.step |
1.7 MB | You want the part with AN431AN-ATRG1 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 445 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (13 pp, sha256
abb5965f39adbd33, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).