component
CJA1117B-ADJ
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Changjiang Electronics Tech (CJ) 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
markdownCJA1117B-ADJ
Changjiang Electronics Tech (CJ) · Linear Voltage Regulators (LDO) · SOT-89-3L
CJA1117B-ADJ from Changjiang Electronics Tech (CJ), 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 | ADJ | passive | Adjust pin on the CJA1117B-ADJ (shown as ADJ/GND), sets the output voltage between 1.25V and 5V with two external resistors; adjust pin current is 60 µA typ and 120 µA max. |
| 2 | OUTPUT | power_out | Regulated output delivering up to 1A with a dropout of 1.15V at 1A output current. |
| 3 | IN | power_in | Input supply pin, with a recommended operating input voltage of 15V and an absolute maximum of 20V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOT-89-3L |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference Voltage | VREF | 1.231 | 1.25 | 1.269 | V | IOUT=10mA, VIN-VOUT=3.23 | 3 |
| Reference Voltage | VREF | 1.225 | 1.25 | 1.275 | V | 10mA≤IOUT≤1A, 2.75V≤VIN-VOUT≤13.25V | 3 |
| Line Regulation | LNR | 0.035 | 0.2 | % | IOUT=10mA, 1.5V≤VIN-VOUT≤12V | 3 | |
| Load Regulation | LDR | 0.2 | 0.4 | % | VIN-VOUT=1.5V, 10mA≤IOUT≤1A | 3 | |
| Dropout Voltage | VD | 1.3 | V | ΔVREF=1%, IOUT=1.0A | 3 | ||
| Current Limit | Ilimit | 1 | A | VIN-VOUT=2V | 3 | ||
| Adjust Pin Current | 60 | 120 | μA | 3 | |||
| Minimum Load Current | IL | 1.7 | 5 | μA | 1.5V≤VIN-VOUT≤12V (ADJ only) | 3 | |
| Quiescent Current | Iq | 5 | 10 | mA | VIN=VOUT+1.25V(ADJ except) | 3 | |
| Ripple Rejection | RR | 60 | 75 | dB | f=120Hz, COUT=22μF Tantalum, VIN-VOUT=3V, IOUT=1A | 3 | |
| Temperature Stability | 0.5 | % | 3 | ||||
| Long-Term Stability | 0.3 | % | TA=125℃, 1000hrs | 3 | |||
| RMS Output Noise (% of VOUT) | 0.003 | % | TA=25℃, 10Hz≤f≤10kHz | 3 | |||
| Thermal Shutdown Hysteresis | 25 | ℃ | 3 | ||||
| Input Voltage (recommended) | Vi | 15 | V | 2 | |||
| Operating Junction Temperature | Tj | -25 | 125 | ℃ | 2 | ||
| Input Voltage (absolute maximum) | Vi | 20 | V | Ta=25℃ | 2 | ||
| Maximum Junction Temperature | Tj | 150 | ℃ | Ta=25℃ | 2 | ||
| Storage Temperature | Tstg | -55 | 150 | ℃ | Ta=25℃ | 2 | |
| Lead Temperature (Soldering, 10sec.) | TL | 260 | ℃ | Ta=25℃ | 2 | ||
| ESD Voltage (Machine Model) | VESD | 400 | V | Ta=25℃ | 2 | ||
| Thermal Resistance Junction to Ambient | RθJA | 250 | ℃/W | 2 |
CAD (KiCad official)
- Symbol:
CJA1117B-ADJ - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
cja1117b-adj-etched.step/cja1117b-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cja1117b-adj.step/cja1117b-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjiang Electronics Tech (CJ) datasheet (6 pp, sha256
fc47d4c515190804, 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).