component
CJ7812B-TFN-ARG
Public Made by Adomby adom
Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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CJ7812B-TFN-ARG
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2L
CJ7812B-TFN-ARG from Changjing, in a TO-252-2L. 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 | IN | power_in | Input of the device; the recommended input voltage range for the CJ7812B is up to 32 V, with an absolute maximum input of 36 V. |
| 2 | GND | power_in | Regulator ground. |
| 3 | OUT | power_out | Output of the device, providing the fixed 12 V output of the CJ7812B with output current up to 1 A at TJ = 25°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2L |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage, TJ = 25°C, ±2% grade | VOUT | 11.75 | 12 | 12.25 | V | TJ = 25°C; ±2% grade | 14 |
| Output voltage over line, load and temperature | VOUT | 11.5 | 12 | 12.5 | V | IOUT = 5mA to 1A, VIN = 14.8 to 27V, TJ = -40 to 125°C, PD ≤ 15W | 14 |
| Line regulation | ΔVRLINE | 25 | 120 | mV | VIN = 14.8 to 27V, IOUT = 500mA | 14 | |
| Load regulation | ΔVRLOAD | 40 | 120 | mV | VIN = 19V, IOUT = 5mA to 1A | 14 | |
| Quiescent current | IQ | 3.4 | 6 | mA | VIN = 19V, TJ = -40 to 125°C, IOUT = 0mA | 14 | |
| Quiescent current change | ΔIQ | 0.1 | 0.8 | mA | VIN = 19V, IOUT = 5mA to 1A | 14 | |
| Quiescent current change | ΔIQ | 0.3 | 0.8 | mA | VIN = 14.8 to 30V, IOUT = 500mA | 14 | |
| Short circuit current | ISC | 200 | mA | VIN = 35V, TA = 25°C | 14 | ||
| Maximum input voltage range | VIN MAX | 36 | V | 8 | |||
| Maximum output current | IOUT MAX | 1 | A | 8 | |||
| Maximum junction temperature | TJ Max | 150 | °C | 8 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 8 | ||
| Soldering temperature | Tsolder | 260 | °C | 10s | 8 | ||
| Input voltage range, CJ7812B | VIN | 32 | V | CJ7812B | 8 | ||
| Operating junction temperature | TJ | -40 | 125 | °C | 8 | ||
| Junction-to-ambient thermal resistance, TO-252-2L | RΘJA | 78.9 | °C/W | TO-252-2L; TA = 25°C; soldered on PCB in still air without extra heat dissipation pads | 9 | ||
| Junction-to-case thermal resistance, TO-252-2L | RΘJC | 5.8 | °C/W | TO-252-2L | 9 | ||
| Reference maximum power dissipation for continuous operation, TO-252-2L | PD Ref | 1.25 | W | TO-252-2L; TA = 25°C; soldered on PCB in still air | 9 |
CAD (KiCad official)
- Symbol:
CJ7812B-TFN-ARG - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2L (KiCad packages3D, STEP)
- 3D model files:
cj7812b-tfn-arg-etched.step/cj7812b-tfn-arg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj7812b-tfn-arg.step/cj7812b-tfn-arg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (33 pp, sha256
2bf7e0142c58a2c8, retrieved 2026-10-17, 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).
# CJ7812B-TFN-ARG
**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2L
CJ7812B-TFN-ARG from Changjing, in a TO-252-2L. 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 | IN | power_in | Input of the device; the recommended input voltage range for the CJ7812B is up to 32 V, with an absolute maximum input of 36 V. |
| 2 | GND | power_in | Regulator ground. |
| 3 | OUT | power_out | Output of the device, providing the fixed 12 V output of the CJ7812B with output current up to 1 A at TJ = 25°C. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2L |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage, TJ = 25°C, ±2% grade | VOUT | 11.75 | 12 | 12.25 | V | TJ = 25°C; ±2% grade | 14 |
| Output voltage over line, load and temperature | VOUT | 11.5 | 12 | 12.5 | V | IOUT = 5mA to 1A, VIN = 14.8 to 27V, TJ = -40 to 125°C, PD ≤ 15W | 14 |
| Line regulation | ΔVRLINE | | 25 | 120 | mV | VIN = 14.8 to 27V, IOUT = 500mA | 14 |
| Load regulation | ΔVRLOAD | | 40 | 120 | mV | VIN = 19V, IOUT = 5mA to 1A | 14 |
| Quiescent current | IQ | | 3.4 | 6 | mA | VIN = 19V, TJ = -40 to 125°C, IOUT = 0mA | 14 |
| Quiescent current change | ΔIQ | | 0.1 | 0.8 | mA | VIN = 19V, IOUT = 5mA to 1A | 14 |
| Quiescent current change | ΔIQ | | 0.3 | 0.8 | mA | VIN = 14.8 to 30V, IOUT = 500mA | 14 |
| Short circuit current | ISC | 200 | | | mA | VIN = 35V, TA = 25°C | 14 |
| Maximum input voltage range | VIN MAX | | | 36 | V | | 8 |
| Maximum output current | IOUT MAX | | | 1 | A | | 8 |
| Maximum junction temperature | TJ Max | | | 150 | °C | | 8 |
| Storage temperature | Tstg | -65 | | 150 | °C | | 8 |
| Soldering temperature | Tsolder | | | 260 | °C | 10s | 8 |
| Input voltage range, CJ7812B | VIN | | | 32 | V | CJ7812B | 8 |
| Operating junction temperature | TJ | -40 | | 125 | °C | | 8 |
| Junction-to-ambient thermal resistance, TO-252-2L | RΘJA | | 78.9 | | °C/W | TO-252-2L; TA = 25°C; soldered on PCB in still air without extra heat dissipation pads | 9 |
| Junction-to-case thermal resistance, TO-252-2L | RΘJC | | 5.8 | | °C/W | TO-252-2L | 9 |
| Reference maximum power dissipation for continuous operation, TO-252-2L | PD Ref | | 1.25 | | W | TO-252-2L; TA = 25°C; soldered on PCB in still air | 9 |
## CAD (KiCad official)
- Symbol: `CJ7812B-TFN-ARG`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2L (KiCad packages3D, STEP)
- 3D model files: `cj7812b-tfn-arg-etched.step` / `cj7812b-tfn-arg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj7812b-tfn-arg.step` / `cj7812b-tfn-arg.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590918647181357056) (33 pp, sha256 `2bf7e0142c58a2c8`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/cj7812b-tfn-arg-datasheet.pdf)