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CJ7812B-TBN-ATG
Public Made by Adomby adom
Changjing Linear Voltage Regulators (LDO), TO-220-3L. 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
markdownCJ7812B-TBN-ATG
Changjing · Linear Voltage Regulators (LDO) · TO-220-3L
CJ7812B-TBN-ATG from Changjing, in a TO-220-3L. 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; recommended input voltage for CJ7812B is up to 32V (absolute maximum 36V). |
| 2 | GND | power_in | Regulator ground. |
| 3 | OUT | power_out | Regulated output of the device, fixed 12V for CJ7812B with output current up to 1A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-220-3L |
| Category | Power Management |
| 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 (±2% grade) | VOUT | 11.75 | 12 | 12.25 | V | TJ = 25°C, VIN = 19V, IOUT = 500mA | 14 |
| Output voltage over 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 (load) | ΔIQ | 0.1 | 0.8 | mA | VIN = 19V, IOUT = 5mA to 1A | 14 | |
| Quiescent current change (line) | ΔIQ | 0.3 | 0.8 | mA | VIN = 14.8 to 30V, IOUT = 500mA | 14 | |
| Maximum input voltage | 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 | ||
| Input voltage range (CJ7812B) | VIN | 32 | V | 8 | |||
| Operating junction temperature | TJ | -40 | 125 | °C | 8 | ||
| ESD human body model | VESD-HBM | 6000 | V | 9 | |||
| ESD machine model | VESD-MM | 500 | V | 9 | |||
| Junction-to-ambient thermal resistance TO-220-3L | RΘJA | 65.1 | °C/W | TA = 25°C, typical, soldered on PCB in still air | 9 | ||
| Junction-to-case thermal resistance TO-220-3L | RΘJC | 5.4 | °C/W | TA = 25°C, typical | 9 | ||
| Reference max power dissipation TO-220-3L | PD Ref | 1.53 | W | continuous operation, TA = 25°C | 9 | ||
| Output voltage temperature coefficient | ΔVOUT / ΔT | 0.96 | mV/°C | 14 | |||
| Output voltage temperature coefficient (relative) | ΔVOUT / (VOUT × ΔT) | 80 | ppm/°C | 14 | |||
| Output noise voltage | VN | 10 | μV / VO | f = 10 to 100k Hz, TA = 25°C | 14 | ||
| Ripple rejection | RR | 60 | dB | f = 120Hz, VIN = 15 to 25V, IOUT = 500mA | 14 | ||
| Dropout voltage | VD | 2 | V | IOUT = 1A | 14 | ||
| Output resistance | ROUT | 11 | mΩ | f = 1kHz | 14 | ||
| Short circuit current | ISC | 200 | mA | VIN = 35V, TA = 25°C | 14 | ||
| Peak current | IPK | 2.2 | A | VIN = 18V | 14 |
CAD (KiCad official)
- Symbol:
CJ7812B-TBN-ATG - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220-3L (KiCad packages3D, STEP)
- 3D model files:
cj7812b-tbn-atg-etched.step/cj7812b-tbn-atg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj7812b-tbn-atg.step/cj7812b-tbn-atg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (33 pp, sha256
2bf7e0142c58a2c8, retrieved 2026-10-22, 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).