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CJU1117B-3.3

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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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docs cju1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
viewers cju1117b-3-3: viewers · Ray
cju1117b-3-3-etched.fit.json cju1117b-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cju1117b-3-3-etched.glb cju1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
cju1117b-3-3-etched.step cju1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
cju1117b-3-3.glb Publish 0.1.0 · Ray
cju1117b-3-3.kicad_mod Publish 0.1.0 · Ray
cju1117b-3-3.kicad_sym cju1117b-3-3: factory component page (tier=lcsc) · Ray
cju1117b-3-3.lbr cju1117b-3-3: factory component page (tier=lcsc) · Ray
cju1117b-3-3.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json cju1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
README.md cju1117b-3-3: specified limits as data (metadata.characteristics, 16 rows from the datasheet) · Ray

CJU1117B-3.3

Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

CJU1117B-3.3 from Changjing, in a TO-252-2. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground return pin. On the fixed-voltage CJU1117B-3.3, pin 1 is the device ground reference. A 10uF tantalum bypass on the input side is referenced to this pin.
2 OUTPUT power_out Regulated 3.3V output pin (3.234V to 3.366V over 10mA-1A load, 4.8V <= VIN <= 12V). Requires a 22uF tantalum output capacitor for stability. Electrically shorted to the DPAK thermal tab.
3 IN power_in Unregulated input supply pin. Operating range 4.8V to 12V for the -3.3 variant (absolute max 20V). Requires a 10uF tantalum input capacitor for line-transient stability.
4 OUTPUT (TAB) power_out Exposed thermal tab on the back of the TO-252-2L package. Electrically connected to OUTPUT (pin 2) and used as the primary heat-sinking path; solder to a copper pour to reach the rated RthetaJA (46 C/W with adequate copper).

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-252-2
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • CJU1117B-3.3

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 (CJU1117B-3.3), 25 C row VO 3.251 3.3 3.35 V VIN≤10V, TJ=25℃ unless otherwise specified 3
Output Voltage (CJU1117B-3.3), second row VO 3.234 3.3 3.366 V 3
Dropout Voltage VD 1.3 V ΔVREF=1%, IOUT=1.0A 3
Ripple Rejection (PSRR) PSRR 60 70 dB f=10kHz, COUT=22μF Tantalum, VIN-VOUT=3V, IOUT=1A 3
Temperature Stability 0.5 % 3
Long-Term Stability 0.3 % TA=125℃, 1000h 3
RMS Output Noise (% of VOUT) 0.003 % TA=25℃, 10Hz≤f≤10kHz 3
Input Voltage (absolute maximum) Vi 20 V 2
Maximum Junction Temperature TJ Max -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, 10 sec.) TL 260 ℃ 10 s soldering 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

CAD (KiCad official)

  • Symbol: CJU1117B-3.3
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2 (KiCad packages3D, STEP)
  • 3D model files: cju1117b-3-3-etched.step / cju1117b-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cju1117b-3-3.step / cju1117b-3-3.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Changjing datasheet (9 pp, sha256 9b166ec2c4e32cc8, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF