component
AZ431LBNTR-G1
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
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PCB Footprint
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Datasheet
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Contents
README
markdownAZ431LBNTR-G1
Diodes Incorporated · Voltage Reference · SOT-23
AZ431LBNTR-G1 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 | REF | input | Reference input to the internal error amplifier (non-inverting node compared to the internal 1.240V bandgap). Typically tied to the R1/R2 divider from CATHODE to set Vout = (1 + R1/R2) * VREF. Reference input current IREF ~0.15 uA typ (0.4 uA max). |
| 2 | CATHODE | passive | Cathode of the shunt regulator (equivalent to a zener cathode). Sinks the regulated shunt current IKA from 0.1 mA up to 100 mA; absolute-max VKA = 20 V, recommended VKA = VREF to 18 V. Dynamic impedance ~0.05 ohm typ at 1 kHz. |
| 3 | ANODE | passive | Anode of the shunt regulator, the common return terminal usually connected to circuit ground / the low side of the resistor divider. Return path for the cathode shunt current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
AZ431LBNTR-G1AZ431LBNTR-G1AZ431LANTR-G1AZ431LBNTR-G1AZ431LANTR-E1AZ431LBNTR-G1AZ431LAZTR-G1AZ431LBNTR-G1AZ431LBZTR-G1AZ431LBNTR-G1AZ431LAKTR-G1AZ431LBNTR-G1AZ431LBKTR-G1AZ431LBNTR-G1AZ431LARTR-G1AZ431LBNTR-G1AZ431LBRTR-G1
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Cathode Voltage (absolute maximum) | VKA | 20 | V | 4 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 100 | mA | 4 | ||
| Reference Input Current Range | IREF | 10 | mA | 4 | |||
| Junction Temperature | TJ | 150 | °C | 4 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| Cathode Voltage (recommended) | VKA | 18 | V | 4 | |||
| Cathode Current (recommended) | IKA | 0.1 | 100 | mA | 4 | ||
| Operating Ambient Temperature Range | -40 | 125 | °C | 4 | |||
| Reference Voltage (1.0% grade) | VREF | 1.228 | 1.24 | 1.252 | V | VKA = VREF, IKA = 10mA; TA = +25°C | 5 |
| Deviation of Reference Voltage Over Full Temperature Range (0°C to +70°C) | ΔVREF | 2 | 10 | mV | VKA = VREF, IKA = 10mA; 0°C to +70°C | 5 | |
| Deviation of Reference Voltage Over Full Temperature Range (-40°C to +85°C) | ΔVREF | 3 | 10 | mV | VKA = VREF, IKA = 10mA; -40°C to +85°C | 5 | |
| Deviation of Reference Voltage Over Full Temperature Range (-40°C to +125°C) | ΔVREF | 4 | 15 | mV | VKA = VREF, IKA = 10mA; -40°C to +125°C | 5 | |
| Ratio of Change in VREF to the Change in Cathode Voltage | ΔVREF/ΔVKA | -0.5 | -1.5 | mV/V | IKA = 10mA; ΔVKA: VREF to 16V | 5 | |
| Reference Input Current | IREF | 0.15 | 0.4 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Deviation of Reference Current Over Full Temperature Range | ΔIREF | 0.1 | 0.4 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞, TA = -40°C to +125°C | 5 | |
| Minimum Cathode Current for Regulation | IKA(Min) | 55 | 80 | µA | VKA = VREF | 5 | |
| Off-State Cathode Current | IKA(Off) | 0.04 | 0.1 | µA | VREF = 0, VKA = 18V | 5 | |
| Off-State Cathode Current | IKA(Off) | 0.01 | 0.05 | µA | VKA = 6, VREF = 0 | 5 | |
| Dynamic Impedance | ZKA | 0.05 | 0.15 | Ω | VKA = VREF, IKA = 1 to 100mA, f ≤ 1.0kHz | 5 | |
| Equivalent Full-Range Temperature Coefficient | 20 | ppm/°C | 1 | ||||
| Thermal Resistance (SOT23) | θJC | 84.84 | °C/W | 5 |
CAD (KiCad official)
- Symbol:
AZ431LBNTR-G1 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
az431lbntr-g1-etched.step/az431lbntr-g1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);az431lbntr-g1.step/az431lbntr-g1.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
az431lbntr-g1.step |
59 KB | You want the bare part, or you mark your own boards. |
az431lbntr-g1-etched.step |
1.8 MB | You want the part with AZ431LBNTR-G1 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 463 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 (19 pp, sha256
6b8c6ed92d8e1c2d, 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).