component
ATL431LIBQDBZR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-3. 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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README
markdownATL431LIBQDBZR
Texas Instruments · Voltage Reference · SOT-23-3
ATL431LIBQDBZR from Texas Instruments, in a SOT-23-3. 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 | output | Regulated output cathode node; provides adjustable voltage output from VREF (2.5V) to 36V; sinks programmable load current from 0.1mA to 15mA maximum. |
| 2 | REF | input | Reference feedback input; receives feedback voltage for closed-loop output voltage regulation; requires input current of 0.2µA to 0.4µA maximum. |
| 3 | ANODE | power_in | Anode ground reference node; typically connected to system ground; provides the voltage reference for the shunt regulator operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| 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 (ATL431LIBx, 25°C) | VREF | 2487 | 2500 | 2512 | mV | VKA = Vref, IKA = 1mA | 5 |
| Reference voltage deviation over temperature range (Q grade) | VI(dev) | 10 | 27 | mV | VKA = Vref, IKA = 1mA | 5 | |
| Reference voltage change to cathode voltage change ratio | ΔVref/ΔVKA | -1.4 | -2.7 | mV/V | IKA = 1mA, ΔVKA = 10V - Vref | 5 | |
| Reference voltage change to cathode voltage change ratio | ΔVref/ΔVKA | -1 | -2 | mV/V | IKA = 1mA, ΔVKA = 36V - 10V | 5 | |
| Reference input current | Iref | 0.2 | 0.4 | µA | IKA = 1mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Reference input current deviation over temperature range | II(dev) | 0.1 | 0.3 | µA | IKA = 1mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Minimum cathode current for regulation | Imin | 65 | 80 | µA | VKA = Vref | 5 | |
| Off-state cathode current | Ioff | 0.1 | 1 | µA | VKA = 36V, Vref = 0 | 5 | |
| Dynamic impedance | /ZKA/ | 0.3 | 0.65 | Ω | VKA = Vref, IKA = 1mA to 15mA | 5 | |
| Cathode voltage (absolute maximum) | VKA | 37 | V | 4 | |||
| Continuous cathode current range (absolute maximum) | IKA | -10 | 18 | mA | 4 | ||
| Reference input current (absolute maximum) | II(ref) | -5 | 10 | mA | 4 | ||
| Operating junction temperature range (absolute maximum) | TJ | -40 | 150 | C | 4 | ||
| Storage temperature range (absolute maximum) | Tstg | -65 | 150 | C | 4 | ||
| Cathode voltage (recommended) | VKA | 36 | V | Minimum printed as VREF (not a number); Vref nominal 2.5 V | 4 | ||
| Continuous cathode current range (recommended) | IKA | 0.1 | 15 | mA | 4 | ||
| Operating free-air temperature (Q grade, ATL43xLIxQ) | TA | -40 | 125 | C | ATL43xLIxQ, natural convection | 4 | |
| Junction-to-ambient thermal resistance | RθJA | 371.7 | C/W | DBZ package, 3 pins | 4 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 145.9 | C/W | DBZ package, 3 pins | 4 | ||
| Junction-to-board thermal resistance | RθJB | 104.7 | C/W | DBZ package, 3 pins | 4 | ||
| Junction-to-top characterization parameter | ψJT | 23.9 | C/W | DBZ package, 3 pins | 4 | ||
| Junction-to-board characterization parameter | ψJB | 102.9 | C/W | DBZ package, 3 pins | 4 |
CAD (KiCad official)
- Symbol:
ATL431LIBQDBZR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
atl431libqdbzr-etched.step/atl431libqdbzr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atl431libqdbzr.step/atl431libqdbzr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (40 pp, sha256
68e0ac1b6eb6b764, retrieved 2026-09-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).