CJ432
Public Made by Adomby adom
Changjing Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
| Name | Last updated |
|---|---|
| docs | |
| viewers | |
| cj432-etched.fit.json | |
| cj432-etched.glb | |
| cj432-etched.step | |
| cj432.glb | |
| cj432.kicad_mod | |
| cj432.kicad_sym | |
| cj432.lbr | |
| cj432.step | |
| package.json | |
| pads.json | |
| page.json | |
| README.md |
CJ432
Changjing · Voltage Reference · SOT-23
CJ432 from Changjing, 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 pin. Voltage on this pin (1.2214-1.2586V, typ 1.24V) is compared internally against the bandgap reference; regulates the shunt when Vref threshold is exceeded. Reference input current is on the order of hundreds of nA (max 6μA over range). |
| 2 | CATHODE | passive | Cathode (K) of the shunt regulator. Sinks current from the load when Vref exceeds the internal bandgap. Max continuous cathode current 100mA, max cathode voltage 18V, dynamic impedance 0.5Ω typ. |
| 3 | ANODE | passive | Anode (A) of the shunt regulator. Normally tied to circuit ground / low-side return; forms the current return path for the shunt element. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | 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 | 1.2214 | 1.2586 | V | VKA=VREF, IKA=10mA (Fig 1) | 2 | |
| Deviation of reference voltage over full temperature range | △Vref(DEV) | 16 | mV | VKA=VREF, IKA=10mA, 0℃≤Ta≤70℃ (Fig 1) | 2 | ||
| Ratio of change in reference input voltage to change in cathode voltage | △Vref / △VKA | 2.4 | mV/V | IKA=10mA, △VKA=1.25V~15V (Fig 2) | 2 | ||
| Deviation of reference input current over full temperature range | △Iref / △T | 0.6 | μA | IKA=10mA, R1=10kΩ, R2=∞, 0℃≤Ta≤70℃ (Fig 2) | 2 | ||
| Minimum cathode current for regulation | IKA(min) | 0.1 | mA | VKA=VREF | 2 | ||
| Off-state cathode current | Ioff | 0.5 | μA | VKA=15V, VREF=0 (Fig 3) | 2 | ||
| Dynamic impedance | ZKA | 0.5 | Ω | VKA=VREF, IKA=0.1~20mA, f≤1.0kHz | 2 | ||
| Cathode Voltage | VKA | 18 | V | 1 | |||
| Cathode Current Range (continuous) | IKA | 100 | mA | continuous | 1 | ||
| Reference Input Current Range | Iref | 6 | μA | 1 | |||
| Power Dissipation | PD | 350 | mW | 1 | |||
| Thermal Resistance from Junction to Ambient | RθJA | 357 | ℃/W | 1 | |||
| Operating Junction Temperature Range | TJ | -40 | 125 | ℃ | 1 | ||
| Storage Temperature Range | Tstg | -65 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
CJ432 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cj432-etched.step/cj432-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj432.step/cj432.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
cj432.step |
59 KB | You want the bare part, or you mark your own boards. |
cj432-etched.step |
1.1 MB | You want the part with CJ432 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 268 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (7 pp, sha256
6ff031d80f2f1bfd, 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).