# AS431HMBNTR-G1

**Diodes Incorporated** · Voltage Reference · SOT-23

AS431HMBNTR-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 | CATHODE | passive | Shunt regulator cathode. Sinks 0.5 mA to 100 mA, absolute-max cathode voltage 40 V (recommended max 36 V). Dynamic impedance ~0.15 Ω typ. In the mirror pin-out (AS431HM...), pin 1 is CATHODE (vs. REF in the normal pin-out). |
| 2 | REF | input | Reference (feedback) input. Internally compared against the 2.495 V bandgap reference; tie via a resistor divider from cathode to set the regulated cathode voltage between VREF and 36 V. Reference input current ~0.7 µA typ (4 µA max), IREF absolute max 10 mA. |
| 3 | ANODE | passive | Shunt regulator anode (return / ground for the shunt current path). Cathode current returns through this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `AS431HMBNTR-G1`
- `AS431HMBNTR-G1MANTR-G1`
- `AS431HMBNTR-G1ANTR-G1`
- `AS431HMBNTR-G1AZTR-G1`
- `AS431HMBNTR-G1BZTR-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 |
|---|---|---|---|---|---|---|---|
| Reference Voltage (1.0% tolerance) | VREF | 2.47 | 2.495 | 2.52 | V | VKA = VREF, IKA = 10mA | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | ΔVREF |  | 5 | 8 | mV | VKA = VREF, IKA = 10mA, 0 to +70°C | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | ΔVREF |  | 5 | 14 | mV | VKA = VREF, IKA = 10mA, -40 to +85°C | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | ΔVREF |  | 5 | 16 | mV | VKA = VREF, IKA = 10mA, -40 to +125°C | 5 |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage | 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 | 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) |  | 0.35 | 0.5 | mA | VKA = VREF | 5 |
| Off-state Cathode Current | IKA(Off) |  | 0.002 | 0.5 | µA | VKA = 36V, VREF = 0 | 5 |
| Dynamic Impedance | ZKA |  | 0.15 | 0.5 | Ω | VKA = VREF, IKA = 0.5 to 100mA, f ≤ 1.0KHz | 5 |
| Cathode Voltage (absolute maximum) | VKA |  |  | 40 | V |  | 4 |
| Cathode Current Range (Continuous) (absolute maximum) | IKA | -100 |  | 150 | mA | Continuous | 4 |
| Reference Input Current Range (absolute maximum) | IREF |  |  | 10 | mA |  | 4 |
| Junction Temperature (absolute maximum) | TJ |  |  | 150 | °C |  | 4 |
| Storage Temperature Range (absolute maximum) | TSTG | -65 |  | 150 | °C |  | 4 |
| ESD Human Body Model (absolute maximum) | ESD |  |  | 2000 | V | Human Body Model | 4 |
| Cathode Voltage (recommended operating) | VKA |  |  | 36 | V | Min printed as VREF | 4 |
| Cathode Current (recommended operating) | IKA | 0.5 |  | 100 | mA |  | 4 |
| Operating Ambient Temperature Range (recommended operating) | TA | -40 |  | 125 | °C |  | 4 |
| Thermal Resistance Junction-to-Ambient, SOT23 (absolute maximum table) | θJA |  | 380 |  | °C/W | SOT23 | 4 |
| Thermal Resistance Junction-to-Case, SOT23 | θJC |  | 136 |  | °C/W | SOT23 | 5 |

## CAD (KiCad official)

- Symbol: `AS431HMBNTR-G1`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `as431hmbntr-g1-etched.step` / `as431hmbntr-g1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `as431hmbntr-g1.step` / `as431hmbntr-g1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](docs/as431hmbntr-g1-datasheet.pdf) (None pp, sha256 `53df2842f0c152f0`, retrieved 2026-08-17, tier: lcsc)
- **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).

[Datasheet PDF](docs/as431hmbntr-g1-datasheet.pdf)