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CJ78M05 3%
Public Made by Adomby adom
Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. 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
markdownCJ78M05 3%
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252
CJ78M05 3% from Changjing, in a TO-252. 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 | input | Input to the device; the absolute maximum input voltage is 35 V, and the datasheet recommends not exceeding 17 V in surge-prone circuits, with a 0.33 µF CIN placed as close as possible to the IN and GND pins. |
| 2 | GND | power_in | Regulator ground, which is the network ground reference for all voltages in the datasheet and should be the return point for CIN and COUT. |
| 3 | OUT | output | Output of the regulator, rated up to 500 mA at TJ = 25°C with a recommended 0.1 µF COUT between OUT and GND (not to exceed 20 µF). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252 |
| 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 (VIN = 7 to 20V, IOUT = 5 to 350mA) | VOUT | 4.75 | 5 | 5.25 | V | VIN = 7 to 20V, IOUT = 5 to 350mA | 7 |
| Output voltage | VOUT | 4.85 | 5 | 5.15 | V | 7 | |
| Line regulation (VIN = 7 to 25V, IOUT = 200mA) | LNR | 3 | 100 | mV | VIN = 7 to 25V, IOUT = 200mA | 7 | |
| Line regulation (VIN = 8 to 25V, IOUT = 200mA) | LNR | 1 | 50 | mV | VIN = 8 to 25V, IOUT = 200mA | 7 | |
| Load regulation (IOUT = 5 to 500mA) | LDR | 15 | 100 | mV | IOUT = 5 to 500mA | 7 | |
| Load regulation (IOUT = 5 to 200mA) | LDR | 5 | 50 | mV | IOUT = 5 to 200mA | 7 | |
| Quiescent current | IQ | 4.2 | 6 | mA | 7 | ||
| Quiescent current change (VIN = 8 to 25V, IOUT = 200mA) | ∆IQ | 0.8 | mA | VIN = 8 to 25V, IOUT = 200mA | 7 | ||
| Quiescent current change (IOUT = 5 to 350mA) | ∆IQ | 0.5 | mA | IOUT = 5 to 350mA | 7 | ||
| Output noise voltage | VN | 40 | 200 | μV | f = 10 to 100kHz | 7 | |
| Ripple rejection | RR | 62 | 80 | dB | VIN = 8 to 18V, IOUT = 300mA, f = 120Hz | 7 | |
| Dropout voltage | VD | 2 | 2.5 | V | IOUT = 350mA | 7 | |
| Operating junction temperature | TJ | -40 | 125 | °C | 5 | ||
| Maximum input voltage | VIN | 35 | V | 5 | |||
| Maximum junction temperature | TJ Max | 150 | °C | 5 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 5 | ||
| Soldering temperature | Tsolder | 260 | °C | 10s | 5 | ||
| Junction-to-ambient thermal resistance (TO-252-2L) | RΘJA | 80 | °C/W | TO-252-2L, still air, TA = 25°C, 1 in² FR-4 with 2 oz copper | 6 | ||
| Junction-to-case thermal resistance (TO-252-2L) | RΘJC | 6 | °C/W | TO-252-2L | 6 | ||
| Reference maximum power dissipation (TO-252-2L) | PD Ref | 1.25 | W | TO-252-2L | 6 |
CAD (KiCad official)
- Symbol:
CJ78M05 3% - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files:
cj78m05-3-etched.step/cj78m05-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj78m05-3.step/cj78m05-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (26 pp, sha256
12af2a83111652a5, retrieved 2026-10-19, 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).