component
CJ78L15C-P3T-ARG
Public Made by Adomby adom
Changjing Linear Voltage Regulators (LDO), SOT-89-3L. 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
markdownCJ78L15C-P3T-ARG
Changjing · Linear Voltage Regulators (LDO) · SOT-89-3L
CJ78L15C-P3T-ARG from Changjing, in a SOT-89-3L. 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 | OUT | output | Output of the regulator, which is 15 V nominal for the CJ78L15C with output current up to 100 mA. |
| 2 | GND | power_in | Regulator ground; all voltages are referenced to the network ground terminal. |
| 3 | IN | input | Input to the device; the CJ78L15C recommended input voltage range extends up to 35 V, and the absolute maximum input voltage is 36 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-89-3L |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | 35 | V | 13 | |||
| Output voltage (±3% grade) | VOUT | 14.55 | 15 | 15.45 | V | TJ = 25°C, ±3% grade | 13 |
| Output voltage over line, load and temperature | VOUT | 14.25 | 15 | 15.75 | V | VIN = 17.5 to 30V, TJ = -40 to 125°C, IOUT = 1 to 100mA, PD ≤ 0.75W | 13 |
| Output current | IOUT | 100 | mA | TJ = 25°C | 13 | ||
| Quiescent current | IQ | 3 | 6 | mA | IOUT = 0mA | 13 | |
| Quiescent current change (line) | ΔIQ | 1.5 | mA | VIN = 20 to 30V, TJ = -40 to 125°C | 13 | ||
| Quiescent current change (load) | ΔIQ | 0.1 | mA | IOUT = 1 to 40mA, TJ = -40 to 125°C | 13 | ||
| Dropout voltage | VDO | 1.7 | 2 | V | IOUT = 40mA | 13 | |
| Dropout voltage | VDO | 1.8 | 2.3 | V | IOUT = 100mA | 13 | |
| Line regulation | ΔVLINE | 25 | 250 | mV | VIN = 17.5 to 30V | 13 | |
| Load regulation | ΔVLOAD | 25 | 150 | mV | IOUT = 1 to 100mA | 13 | |
| Ripple rejection | RR | 34 | 39 | dB | VIN = 18.5 to 28.5V, f = 120Hz | 13 | |
| Input voltage | VIN MAX | 36 | V | 6 | |||
| Maximum junction temperature | TJ Max | 150 | °C | 6 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 6 | ||
| Soldering temperature | Tsolder | 260 | °C | 10 s | 6 | ||
| Input voltage range | VIN | 35 | V | CJ78L15C | 6 | ||
| Operating junction temperature | TJ | -40 | 125 | °C | 6 | ||
| Junction-to-ambient thermal resistance (SOT-89-3L) | RΘJA | 121.6 | °C/W | Still air, TA = 25°C, 1 in² FR-4 board, 2 oz copper | 7 | ||
| Junction-to-case thermal resistance (SOT-89-3L) | RΘJC | 29.4 | °C/W | Still air, TA = 25°C, 1 in² FR-4 board, 2 oz copper | 7 | ||
| Reference maximum power dissipation for continuous operation (SOT-89-3L) | PD Ref | 0.82 | W | Still air, TA = 25°C, 1 in² FR-4 board, 2 oz copper | 7 |
CAD (KiCad official)
- Symbol:
CJ78L15C-P3T-ARG - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
cj78l15c-p3t-arg-etched.step/cj78l15c-p3t-arg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj78l15c-p3t-arg.step/cj78l15c-p3t-arg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (31 pp, sha256
796e71efc59e8ce7, retrieved 2026-11-05, 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).