component
L-CJ78M05
Public Made by Adomby adom
Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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L-CJ78M05
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
L-CJ78M05 from Changjing, in a TO-252-2. 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 terminal; the absolute maximum input voltage Vi is 35 V, and regulation is specified for 7 V ≤ Vi ≤ 20 V (up to 25 V in the line-regulation test), with a 0.33 μF input bypass capacitor recommended. |
| 2 | GND | power_in | Ground terminal of the regulator, printed as pin 2 in the TO-252-2L pinout; the datasheet gives no separate electrical limit for this pin. |
| 3 | OUT | power_out | Regulated 5 V output (4.75 V to 5.25 V over 7 V ≤ Vi ≤ 20 V and 5 mA to 350 mA), with a maximum output current IOM of 0.5 A and a 0.1 μF output capacitor recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2 |
| 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 | Vo | 4.85 | 5 | 5.15 | V | Vi=10V, Io=350mA, Ci=0.33μF, Co=0.1μF, unless otherwise specified (table header) | 1 |
| Output Voltage | Vo | 4.75 | 5 | 5.25 | V | 7V≤Vi≤20V, Io=5mA-350mA | 1 |
| Load Regulation | ΔVo | 15 | 100 | mV | Io=5mA-0.5A, TJ=25℃ | 1 | |
| Load Regulation | ΔVo | 5 | 50 | mV | Io=5mA-200mA, TJ=25℃ | 1 | |
| Line Regulation | ΔVo | 3 | 100 | mV | 7V≤Vi≤25V, Io=200mA, TJ=25℃ | 1 | |
| Line Regulation | ΔVo | 1 | 50 | mV | 8V≤Vi≤25V, Io=200mA, TJ=25℃ | 1 | |
| Quiescent Current | Iq | 4.2 | 6 | mA | 1 | ||
| Quiescent Current Change | ΔIq | 0.8 | mA | 8V≤Vi≤25V, Io=200mA | 1 | ||
| Quiescent Current Change | ΔIq | 0.5 | mA | 5mA≤IO≤350mA | 1 | ||
| Output Noise Voltage | VN | 40 | 200 | μV | 10Hz≤f≤100KHz, TJ=25℃ | 1 | |
| Ripple Rejection | RR | 62 | 80 | dB | 8V≤Vi≤18V, f=120Hz, Io=300mA | 1 | |
| Dropout Voltage | Vd | 2 | 2.5 | V | Io=350mA, TJ=25℃ | 1 | |
| Short Circuit Current | Isc | 300 | mA | Vi=10V, TJ=25℃ | 1 | ||
| Peak Current | Ipk | 0.5 | A | 1 | |||
| Input Voltage | Vi | 35 | V | 1 | |||
| Continuous Total Dissipation | PD | 1.25 | W | 1 | |||
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | 1 | ||
| Operating Junction Temperature Range | TOPR | -40 | 125 | ℃ | 1 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 80 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
L-CJ78M05 - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files:
l-cj78m05-etched.step/l-cj78m05-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l-cj78m05.step/l-cj78m05.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
bf26fbc3285af88c, retrieved 2026-10-18, 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).
# L-CJ78M05
**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
L-CJ78M05 from Changjing, in a TO-252-2. 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 terminal; the absolute maximum input voltage Vi is 35 V, and regulation is specified for 7 V ≤ Vi ≤ 20 V (up to 25 V in the line-regulation test), with a 0.33 μF input bypass capacitor recommended. |
| 2 | GND | power_in | Ground terminal of the regulator, printed as pin 2 in the TO-252-2L pinout; the datasheet gives no separate electrical limit for this pin. |
| 3 | OUT | power_out | Regulated 5 V output (4.75 V to 5.25 V over 7 V ≤ Vi ≤ 20 V and 5 mA to 350 mA), with a maximum output current IOM of 0.5 A and a 0.1 μF output capacitor recommended. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2 |
| 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 | Vo | 4.85 | 5 | 5.15 | V | Vi=10V, Io=350mA, Ci=0.33μF, Co=0.1μF, unless otherwise specified (table header) | 1 |
| Output Voltage | Vo | 4.75 | 5 | 5.25 | V | 7V≤Vi≤20V, Io=5mA-350mA | 1 |
| Load Regulation | ΔVo | | 15 | 100 | mV | Io=5mA-0.5A, TJ=25℃ | 1 |
| Load Regulation | ΔVo | | 5 | 50 | mV | Io=5mA-200mA, TJ=25℃ | 1 |
| Line Regulation | ΔVo | | 3 | 100 | mV | 7V≤Vi≤25V, Io=200mA, TJ=25℃ | 1 |
| Line Regulation | ΔVo | | 1 | 50 | mV | 8V≤Vi≤25V, Io=200mA, TJ=25℃ | 1 |
| Quiescent Current | Iq | | 4.2 | 6 | mA | | 1 |
| Quiescent Current Change | ΔIq | | | 0.8 | mA | 8V≤Vi≤25V, Io=200mA | 1 |
| Quiescent Current Change | ΔIq | | | 0.5 | mA | 5mA≤IO≤350mA | 1 |
| Output Noise Voltage | VN | | 40 | 200 | μV | 10Hz≤f≤100KHz, TJ=25℃ | 1 |
| Ripple Rejection | RR | 62 | 80 | | dB | 8V≤Vi≤18V, f=120Hz, Io=300mA | 1 |
| Dropout Voltage | Vd | | 2 | 2.5 | V | Io=350mA, TJ=25℃ | 1 |
| Short Circuit Current | Isc | | 300 | | mA | Vi=10V, TJ=25℃ | 1 |
| Peak Current | Ipk | | 0.5 | | A | | 1 |
| Input Voltage | Vi | | | 35 | V | | 1 |
| Continuous Total Dissipation | PD | | | 1.25 | W | | 1 |
| Storage Temperature Range | TSTG | -65 | | 150 | ℃ | | 1 |
| Operating Junction Temperature Range | TOPR | -40 | | 125 | ℃ | | 1 |
| Thermal Resistance from Junction to Ambient | RθJA | | 80 | | ℃/W | | 1 |
## CAD (KiCad official)
- Symbol: `L-CJ78M05`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files: `l-cj78m05-etched.step` / `l-cj78m05-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l-cj78m05.step` / `l-cj78m05.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/8589834551121391616) (5 pp, sha256 `bf26fbc3285af88c`, retrieved 2026-10-18, 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/l-cj78m05-datasheet.pdf)