component
ALJTL431A
Public Made by Adomby adom
ALJ Voltage Reference, TO-92. 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
markdownALJTL431A
ALJ · Voltage Reference · TO-92
ALJTL431A from ALJ, in a TO-92. 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 | REFERENCE | input | Reference input of the adjustable shunt regulator, with reference input current of 1.8 µA typ and 4 µA max, and reference voltage of 2.495 V typ (2.445 to 2.545 V). |
| 2 | ANODE | power_in | Anode of the shunt reference, normally connected to ground; cathode current range is -100 to +150 mA continuous. |
| 3 | CATHODE | passive | Cathode of the shunt reference, adjustable to a maximum of 40 V (VKA) with a 1 to 100 mA sink capability and 0.5 mA typ minimum cathode current for regulation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ALJ |
| Package | TO-92 |
| 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 input voltage | Vref | 2.445 | 2.495 | 2.545 | V | VKA=VREF, IKA=10mA | 2 |
| Deviation of reference input voltage over temperature | △Vref/△T | 3 | 17 | mV | VKA=VREF, IKA=10mA, Tmin≤Ta≤Tmax (0℃ to +70℃) | 2 | |
| Ratio of change in Vref to change in cathode voltage | △Vref/△VKA | -1.4 | -2.7 | mV/V | IKA=10mA, △VKA=10V~VREF | 2 | |
| Ratio of change in Vref to change in cathode voltage | △Vref/△VKA | -1 | -2 | mV/V | IKA=10mA, △VKA=36V~10V | 2 | |
| Reference input current | Iref | 1.8 | 4 | μA | IKA=10mA, R1=10kΩ, R2=∞ | 2 | |
| Deviation of reference input current over full temperature range | △Iref/△T | 0.4 | 1.2 | μA | IKA=10mA, R1=10kΩ, R2=∞, Ta=full Temperature | 2 | |
| Minimum cathode current for regulation | IKA(min) | 0.5 | 1 | mA | VKA=VREF | 2 | |
| Off-state cathode current | IKA(OFF) | 0.05 | 1 | μA | VKA=36V, VREF=0 | 2 | |
| Dynamic impedance | ZKA | 0.2 | 0.5 | Ω | VKA=VREF, f≤1.0kHz, IKA=1 to 100mA | 2 | |
| Cathode voltage | VKA | 40 | V | 1 | |||
| Cathode current range (continuous) | IKA | -100 | 150 | mA | 1 | ||
| Reference input current range | Iref | 0.05 | 10 | mA | 1 | ||
| Power dissipation | PD | 700 | mW | 1 | |||
| Operating ambient temperature range | Topr | -60 | 125 | °C | 1 | ||
| Operating junction temperature | Tj | -25 | 150 | °C | 1 | ||
| Storage temperature range | Tstg | -65 | 150 | °C | 1 | ||
| Thermal resistance from junction to ambient | RθJA | 178 | °C/W | 1 | |||
| Equivalent temperature coefficient over full temperature range | 50 | ppm/°C | typical value over whole temperature scope | 1 | |||
| ESD tolerance (human body model) | 4000 | V | human body model | 1 | |||
| Operating temperature range | -60 | 125 | °C | 1 |
CAD (KiCad official)
- Symbol:
ALJTL431A - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
aljtl431a-etched.step/aljtl431a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);aljtl431a.step/aljtl431a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ALJ datasheet (4 pp, sha256
d3ea72e66a26a9dd, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-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).