AZ431AN-ATRG1

@@ -0,0 +1,43 @@+# AZ431AN-ATRG1++**Diodes Incorporated** · Voltage Reference · SOT-23++AZ431AN-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 | REF | input | Reference input to the internal error amplifier. The device regulates so that V(REF) equals the internal 2.5 V bandgap reference. Reference input current range is +/-10 mA absolute max; typical bias current is in the microamp range. Connect to the tap of the external resistor divider from CATHODE to ANODE that sets the shunt regulation voltage: V_KA = (1 + R1/R2) * V_REF. |+| 2 | CATHODE | passive | Cathode of the shunt regulator (equivalent to a programmable Zener cathode). Sinks the regulated current (I_KA) from the load through an internal pass transistor when V_KA reaches the programmed threshold. Rated V_KA up to 40 V absolute max (36 V recommended), continuous cathode current -100 to +150 mA absolute max (1-100 mA recommended operating). |+| 3 | ANODE | passive | Anode of the shunt regulator; the internal reference and error amplifier ground return. Connect to the negative side of the shunt (typically circuit ground / the low side of the R1/R2 divider). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | SOT-23 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `AZ431AN-ATRG1`+- `AZ431AN-ATRG1AZ431ANTR-G1`++## CAD (KiCad official)++- Symbol: `AZ431AN-ATRG1`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AZ431AN-ATRG1.pdf) (19 pp, sha256 `af7f4848d81a3997`, 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).++[Datasheet PDF](docs/az431an-atrg1-datasheet.pdf)

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