component
CJ431B
Public Made by Adomby adom
Changjing Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 23d ago |
| viewers | 23d ago |
| cj431b-etched.glb | 23d ago |
| cj431b-etched.step | 23d ago |
| cj431b-hero.glb | 23d ago |
| cj431b-hero.overlay.json | 23d ago |
| cj431b.glb | 23d ago |
| cj431b.kicad_mod | 23d ago |
| cj431b.kicad_sym | 23d ago |
| cj431b.lbr | 23d ago |
| cj431b.step | 23d ago |
| package.json | 23d ago |
| page.json | 17d ago |
| README.md | 17d ago |
CJ431B
Changjing · Voltage Reference · SOT-23
CJ431B from Changjing, in a SOT-23. 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, where Vref is approximately 2.5V and the reference input current is rated from 0.05 mA to 10 mA. |
| 2 | CATHODE | passive | Cathode terminal of the shunt regulator, rated for a cathode voltage of 40 V maximum and a continuous cathode current of -100 mA to +150 mA. |
| 3 | ANODE | passive | Anode terminal of the shunt regulator; the datasheet gives no pin-specific electrical limit for this terminal beyond the device ratings. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| 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 | 2.483 | 2.495 | 2.508 | V | VKA=VREF, IKA=10mA | 2 |
| Deviation of reference input voltage over temperature (note) | ΔVref/ΔT | 8 | 17 | mV | VKA=VREF, IKA=10mA; note TMIN=-25℃, TMAX=+125℃ | 2 | |
| Ratio of change in reference input voltage to change in cathode voltage | ΔVref/ΔVKA | -1 | -2.7 | mV/V | IKA=10mA; ΔVKA=10V~VREF | 2 | |
| Ratio of change in reference input voltage to change in cathode voltage | ΔVref/ΔVKA | -0.4 | -2 | mV/V | IKA=10mA; ΔVKA=36V~10V | 2 | |
| Reference input current | Iref | 0.5 | 1.2 | μA | IKA=10mA, R1=10kΩ, R2=∞ | 2 | |
| Deviation of reference input current over full temperature range | ΔIref/ΔT | 0.4 | 1.2 | μA | IKA=10mA, R1=10kΩ, R2=∞; full temperature range | 2 | |
| Minimum cathode current for regulation | IKA(min) | 0.08 | 0.3 | mA | VKA=VREF | 2 | |
| Off-state cathode current | IKA(OFF) | 0.01 | 0.8 | μA | VKA=36V, VREF=0 | 2 | |
| Dynamic impedance | ZKA | 0.1 | 0.37 | Ω | VKA=VREF, IKA=0.2 to 100mA, f≤1.0kHz | 2 | |
| Temperature coefficient (features) | 25 | ppm/°C | 1 | ||||
| Cathode Voltage | VKA | 40 | V | 1 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | Continuous | 1 | |
| Reference Input Current Range | Iref | 0.05 | 10 | mA | 1 | ||
| Power Dissipation | PD | 300 | mW | 1 | |||
| Lead Temperature | T | 260 | ℃ | 1.6mm aside from the case, 10 seconds | 1 | ||
| Operating Ambient Temperature Range | Tj | -40 | 125 | ℃ | 1 | ||
| Storage Temperature Range | Tstg | -65 | 150 | ℃ | 1 | ||
| ESD (HBM) | VESD | 2.5 | kV | HBM | 1 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 417 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
CJ431B - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cj431b-etched.step/cj431b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj431b.step/cj431b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (7 pp, sha256
ee6071469d503f9f, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).