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SCJU1117B-3.3
Public Made by Adomby adom
Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. 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
markdownSCJU1117B-3.3
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2L
SCJU1117B-3.3 from Changjing, in a TO-252-2L. 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 | GND / ADJ | power_in | Ground reference for the fixed-voltage versions, and the ADJ pin on the adjustable version, where the output is set by external resistors R1 and R2. |
| 2 | OUTPUT | power_out | Regulated output of the 3.3V fixed version, with dropout of 1.3V at 1A output current and trimmed current limit. |
| 3 | IN | power_in | Unregulated input supply; the absolute maximum input voltage is 20V and the recommended maximum is 15V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2L |
| 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 (absolute maximum) | Vi | 20 | V | 2 | |||
| Maximum Junction Temperature | TJ | -40 | 150 | ℃ | 2 | ||
| Storage Temperature | Tstg | -40 | 150 | ℃ | 2 | ||
| Operating Ambient Temperature | TA | -40 | 85 | ℃ | 2 | ||
| ESD Voltage (Machine Model) | VESD | 250 | V | Machine Model | 2 | ||
| Lead Temperature (Soldering) | TL | 260 | ℃ | Soldering, 10 s | 2 | ||
| Input Voltage (recommended) | Vi | 15 | V | 2 | |||
| Operating Junction Temperature | TJ | -40 | 125 | ℃ | 2 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 80 | ℃/W | 2 | |||
| Output Voltage | VO | 3.251 | 3.3 | 3.35 | V | 3 | |
| Output Voltage | VO | 3.234 | 3.3 | 3.366 | V | 3 | |
| Dropout Voltage | VD | 1.3 | V | ΔVREF=1%, IOUT=1.0A | 3 | ||
| Minimum Load Current | 5 | 10 | μA | 3 | |||
| Quiescent Current | Iq | 1.7 | 5 | mA | VIN≤10V, TJ=25℃ (table note) | 3 | |
| Ripple Rejection | 60 | 70 | dB | f=10kHz, COUT=22μF Tantalum, VIN-VOUT=3V, IOUT=1A | 3 | ||
| Long-Term Stability | 0.3 | % | TA=125℃, 1000h | 3 | |||
| RMS Output Noise (% of VOUT) | 0.003 | % | TA=25℃, 10Hz≤f≤10kHz | 3 | |||
| Thermal Shutdown Hysteresis | 25 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
SCJU1117B-3.3 - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2L (KiCad packages3D, STEP)
- 3D model files:
scju1117b-3-3-etched.step/scju1117b-3-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);scju1117b-3-3.step/scju1117b-3-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (9 pp, sha256
9e03a4b61bf18ec4, 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).