component
AS431BRTR-G1
Public Made by Adomby adom
Diodes Incorporated Voltage References, SOT-89-3. 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
markdownAS431BRTR-G1
Diodes Incorporated · Voltage References · SOT-89-3
AS431BRTR-G1 from Diodes Incorporated, in a SOT-89-3. 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 | REF | input | Reference input that sets the regulated cathode voltage; VREF is 2.5V typical and the absolute maximum reference input current is 10mA. |
| 2 | ANODE | power_in | Anode terminal, normally tied to ground, which carries the shunt current sunk from the cathode (cathode current range -100 to 150mA absolute maximum). |
| 3 | CATHODE | passive | Cathode terminal of the shunt regulator, operating from VREF up to 36V (40V absolute maximum) with 1mA to 100mA recommended cathode current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-89-3 |
| Category | Power Supply Chip |
| Pins | 3 |
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 (1.0% tolerance) | VREF | 2.475 | 2.5 | 2.525 | V | VKA = VREF, IKA = 10mA | 5 |
| Deviation of Reference Voltage Over Full Temperature Range (0 to +70°C) | ∆VREF | 4.5 | 8 | mV | VKA = VREF, IKA = 10mA, 0 to +70°C | 5 | |
| Deviation of Reference Voltage Over Full Temperature Range (-40 to +85°C) | ∆VREF | 4.5 | 10 | mV | VKA = VREF, IKA = 10mA, -40 to +85°C | 5 | |
| Deviation of Reference Voltage Over Full Temperature Range (-40 to +125°C) | ∆VREF | 4.5 | 16 | mV | VKA = VREF, IKA = 10mA, -40 to +125°C | 5 | |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (10V to VREF) | ∆VREF/∆VKA | -1 | -2.7 | mV/V | ∆VKA = 10V to VREF, IKA = 10mA | 5 | |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (36V to 10V) | ∆VREF/∆VKA | -0.5 | -2 | mV/V | ∆VKA = 36V to 10V, IKA = 10mA | 5 | |
| Reference Current | IREF | 0.7 | 4 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Deviation of Reference Current Over Full Temperature Range | ∆IREF | 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 (recommended operating, maximum) | VKA | 36 | V | 4 | |||
| Cathode Current (recommended operating) | IKA | 1 | 100 | mA | 4 | ||
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | 4 | ||
| Cathode Voltage (absolute maximum) | VKA | 40 | V | 4 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | Continuous | 4 | |
| Reference Input Current Range | IREF | 10 | mA | 4 | |||
| Power Dissipation (Z, R package; R = SOT89) | PD | 770 | mW | Z, R package | 4 | ||
| Junction Temperature | TJ | 150 | °C | 4 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| ESD (Human Body Model) | ESD | 2000 | V | Human Body Model | 4 | ||
| Thermal Resistance (SOT89) | θJC | 29.8 | °C/W | 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 |
|---|---|---|---|---|
| housing | Abs | ESD ESD (Human Body Model) 2000 V Note 5: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and | 4 |
CAD (KiCad official)
- Symbol:
AS431BRTR-G1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
as431brtr-g1-etched.step/as431brtr-g1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);as431brtr-g1.step/as431brtr-g1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (20 pp, sha256
03f54aac77941ed9, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).