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SCJA1117B-ADJ-A
Public Made by Adomby adom
Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, 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
markdownSCJA1117B-ADJ-A
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L
SCJA1117B-ADJ-A 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 | ADJ/GND | passive | Adjust pin of the adjustable version, where the reference voltage of 1.25V is developed across R1 to ground and the adjust current is about 50μA (55μA typ., 120μA max. per the electrical table), so R1 should be 125Ω or lower to meet the 10mA minimum load and no higher than 625Ω for stability. |
| 2 | OUTPUT | power_out | Regulated output that can deliver up to 1A, with the adjustable version set from 1.25V to 12V by two external resistors and a minimum 10μF tantalum output capacitor required for stability and transient response. |
| 3 | IN | power_in | Unregulated input supply with a 20V absolute maximum rating and 15V recommended maximum, requiring a 10μF tantalum input bypass capacitor and a dropout of about 1.3V (typ.) at 0.8A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-89-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | Vi | 20 | V | 2 | |||
| Maximum Junction Temperature | Tj | -40 | 150 | ℃ | 2 | ||
| Storage Temperature | Tstg | -40 | 150 | ℃ | 2 | ||
| Lead Temperature (Soldering, 10s) | TL | 260 | ℃ | Soldering, 10s | 2 | ||
| ESD Rating | HBM | 8 | kV | Human Body Model | 2 | ||
| Operating Ambient Temperature | TA | -40 | 85 | ℃ | 2 | ||
| Input Voltage (recommended) | Vi | 15 | V | 2 | |||
| Operating Junction Temperature | Tj | -40 | 125 | ℃ | 2 | ||
| Adjustable output voltage range | VOUT | 1.25 | 12 | V | Adjustable version, set with two external resistors | 1 | |
| Output capacitor (minimum) | COUT | 10 | μF | Tantalum capacitor at output | 1 | ||
| R1 (ADJ to output resistor, recommended) | R1 | 125 | ohm | Recommended to meet minimum load current (>10mA) | 5 | ||
| R1 (ADJ to output resistor, upper limit) | R1 | 625 | ohm | Not allowed to be higher; part stable at load current about 2mA | 5 | ||
| Reference Voltage | VREF | 1.219 | 1.25 | 1.281 | V | IOUT=10mA, VIN=3.25V; 10mA≤IOUT≤1A, 2.75V≤VIN-VOUT≤12V | 3 |
| Adjust Pin Current | IAdj | 55 | 120 | μA | VIN=5V, IOUT=10mA | 3 | |
| Adjust Pin Current Change | Ichange | 0.2 | 10 | μA | VIN=5V, 10mA≤IOUT≤1A | 3 | |
| Quiescent Current | Iq | 5 | mA | VIN=10V | 3 | ||
| Reference voltage temperature coefficient | 100 | ppm/°C | Bandgap reference, temperature coefficient under 100 ppm/°C | 4 | |||
| Thermal Resistance from Junction to Ambient | RθJA | 250 | ℃/W | Junction to ambient; footnote: varies from 46 to >90 ℃/W with mounting and copper area | 2 |
CAD (KiCad official)
- Symbol:
SCJA1117B-ADJ-A - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
scja1117b-adj-a-etched.step/scja1117b-adj-a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);scja1117b-adj-a.step/scja1117b-adj-a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (10 pp, sha256
cf3aa4b349c86dbb, retrieved 2026-10-17, 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).