component
SCJT1117B-1.8-A
Public Made by Adomby adom
Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SCJT1117B-1.8-A
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
SCJT1117B-1.8-A from Changjing, in a SOT-223. 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 | ADJ/GND | power_in | Shared pin labelled ADJ/GND: it is the ground reference for the fixed-output SCJT1117B-1.8-A (the adjust function applies only to the ADJ version, where IAdj is about 50uA per the datasheet). |
| 2 | OUTPUT | power_out | Regulated output of the 1.8V fixed version, which provides up to 1A with 1.3V typical dropout and is protected by current limiting and thermal shutdown. |
| 3 | IN | power_in | Unregulated input supply; the ratings table lists an input voltage of 20 V (absolute ratings) and 15 V (recommended operating conditions), with a 1.3V typical dropout at 1A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-223 |
| 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 | 1.764 | 1.8 | 1.836 | V | IOUT=10mA, VIN=3.8V | 3 |
| Output Voltage | VO | 1.755 | 1.8 | 1.845 | V | 10mA≤IOUT≤1A, 3.3V≤VIN≤12V | 3 |
| Line Regulation | LNR | 0.03 | 0.2 | % | IOUT=10mA, 1.5V≤VIN-VOUT≤10.2V | 3 | |
| Load Regulation | LDR | 9 | 36 | mV | VIN-VOUT=1.5V, 10mA≤IOUT≤1A | 3 | |
| Minimum Load Current | IL | 2 | 10 | mA | 3 | ||
| Quiescent Current | Iq | 2 | 5 | mA | VIN=12V | 3 | |
| Ripple Rejection | RR | 60 | dB | f=1kHz, CIN=10μF/25V, COUT=10μF/25V, VIN-VOUT=2V, IOUT=10mA | 3 | ||
| Input Voltage | Vi | 20 | V | 2 | |||
| Operating Junction Temperature | Tj | -40 | 150 | ℃ | 2 | ||
| Storage Temperature | Tstg | -40 | 150 | ℃ | 2 | ||
| Lead Temperature (Soldering, 10s) | TL | 260 | ℃ | Soldering, 10s | 2 | ||
| ESD Rating Human Body Model | HBM | 8 | kV | Human Body Model | 2 | ||
| Input Voltage | Vi | 15 | V | 2 | |||
| Operating Junction Temperature | Tj | -20 | 125 | ℃ | 2 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 100 | ℃/W | 2 | |||
| Thermal Resistance (SOT-223, as stated in text) | 20 | °C/W | 5 | ||||
| Thermal Resistance (5cm*5cm copper, two sides, as stated in text) | 30 | °C/W | 5cm*5cm copper area, two sides | 5 | |||
| Thermal Resistance (no good heat-dissipation copper, as stated in text) | 120 | °C/W | No good heat dissipation copper area in PCB | 5 | |||
| Reference Temperature Coefficient (bandgap) | 100 | ppm/°C | 4 |
CAD (KiCad official)
- Symbol:
SCJT1117B-1.8-A - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
scjt1117b-1-8-a-etched.step/scjt1117b-1-8-a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);scjt1117b-1-8-a.step/scjt1117b-1-8-a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (9 pp, sha256
11fe3bf2c0fe51b0, 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).
# SCJT1117B-1.8-A
**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
SCJT1117B-1.8-A from Changjing, in a SOT-223. 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 | ADJ/GND | power_in | Shared pin labelled ADJ/GND: it is the ground reference for the fixed-output SCJT1117B-1.8-A (the adjust function applies only to the ADJ version, where IAdj is about 50uA per the datasheet). |
| 2 | OUTPUT | power_out | Regulated output of the 1.8V fixed version, which provides up to 1A with 1.3V typical dropout and is protected by current limiting and thermal shutdown. |
| 3 | IN | power_in | Unregulated input supply; the ratings table lists an input voltage of 20 V (absolute ratings) and 15 V (recommended operating conditions), with a 1.3V typical dropout at 1A. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-223 |
| 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 | 1.764 | 1.8 | 1.836 | V | IOUT=10mA, VIN=3.8V | 3 |
| Output Voltage | VO | 1.755 | 1.8 | 1.845 | V | 10mA≤IOUT≤1A, 3.3V≤VIN≤12V | 3 |
| Line Regulation | LNR | | 0.03 | 0.2 | % | IOUT=10mA, 1.5V≤VIN-VOUT≤10.2V | 3 |
| Load Regulation | LDR | | 9 | 36 | mV | VIN-VOUT=1.5V, 10mA≤IOUT≤1A | 3 |
| Minimum Load Current | IL | | 2 | 10 | mA | | 3 |
| Quiescent Current | Iq | | 2 | 5 | mA | VIN=12V | 3 |
| Ripple Rejection | RR | | 60 | | dB | f=1kHz, CIN=10μF/25V, COUT=10μF/25V, VIN-VOUT=2V, IOUT=10mA | 3 |
| Input Voltage | Vi | | | 20 | V | | 2 |
| Operating Junction Temperature | Tj | -40 | | 150 | ℃ | | 2 |
| Storage Temperature | Tstg | -40 | | 150 | ℃ | | 2 |
| Lead Temperature (Soldering, 10s) | TL | | | 260 | ℃ | Soldering, 10s | 2 |
| ESD Rating Human Body Model | HBM | | | 8 | kV | Human Body Model | 2 |
| Input Voltage | Vi | | | 15 | V | | 2 |
| Operating Junction Temperature | Tj | -20 | | 125 | ℃ | | 2 |
| Thermal Resistance from Junction to Ambient | RθJA | | 100 | | ℃/W | | 2 |
| Thermal Resistance (SOT-223, as stated in text) | | | 20 | | °C/W | | 5 |
| Thermal Resistance (5cm*5cm copper, two sides, as stated in text) | | | 30 | | °C/W | 5cm*5cm copper area, two sides | 5 |
| Thermal Resistance (no good heat-dissipation copper, as stated in text) | | | 120 | | °C/W | No good heat dissipation copper area in PCB | 5 |
| Reference Temperature Coefficient (bandgap) | | | | 100 | ppm/°C | | 4 |
## CAD (KiCad official)
- Symbol: `SCJT1117B-1.8-A`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `scjt1117b-1-8-a-etched.step` / `scjt1117b-1-8-a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `scjt1117b-1-8-a.step` / `scjt1117b-1-8-a.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/8588944715140382720) (9 pp, sha256 `11fe3bf2c0fe51b0`, 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/scjt1117b-1-8-a-datasheet.pdf)