component
CJU1117B-3.3
Public Made by Adomby adom
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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cju1117b-3-3: factory component page (tier=lcsc)
4 files changed
+42−33
README.md+5−4@@ -8,9 +8,10 @@ CJU1117B-3.3 from Changjing, in a TO-252-2. Pinout and pin descriptions extracte | Pin | Name | Type | Function | |---|---|---|---|-| 1 | GND | power_in | Ground reference for the fixed-output CJU1117B-3.3 variant. On the ADJ variant this pin is the ADJ feedback input tied to a resistor divider; on fixed-voltage variants it is tied directly to the system ground. |-| 2 | OUTPUT | power_out | Regulated 3.3V output (3.234V-3.366V over line/load). Rated for 1A continuous. Requires a 22 uF tantalum output capacitor for stability per the typical application circuit. |-| 3 | IN | power_in | Unregulated input supply. Recommended operating range 4.8V-12V for the 3.3V variant (Vin absolute max 20V). Requires a 10 uF tantalum input capacitor. |+| 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 @@ -19,7 +20,7 @@ CJU1117B-3.3 from Changjing, in a TO-252-2. Pinout and pin descriptions extracte | Manufacturer | Changjing | | Package | TO-252-2 | | Category | PMIC |-| Pins | 3 |+| Pins | 4 | ## Ordering variants
cju1117b-3-3.kicad_sym+5−1@@ -16,7 +16,11 @@ (name "OUTPUT" (effects (font (size 1.27 1.27)))) (number "2" (effects (font (size 1.27 1.27)))) )- (pin power_in line (at 17.78 0.00 180) (length 5.08)+ (pin power_out line (at 17.78 0.00 180) (length 5.08)+ (name "OUTPUT (TAB)" (effects (font (size 1.27 1.27))))+ (number "4" (effects (font (size 1.27 1.27))))+ )+ (pin power_in line (at 17.78 -2.54 180) (length 5.08) (name "IN" (effects (font (size 1.27 1.27)))) (number "3" (effects (font (size 1.27 1.27)))) )
cju1117b-3-3.lbr+18−17@@ -50,7 +50,7 @@ <layer number="98" name="Guide" color="6" fill="1" visible="yes" active="yes"/> </layers> <library>-<description></description>+<description>TO-252-2 (symbol synthesized from footprint pads)</description> <packages> <package name="TO-252-2"> <description>3 pads, 10.6 x 5.8 mm. TO-252/DPAK SMD package</description>@@ -87,30 +87,31 @@ </package> </packages> <symbols>-<symbol name="CJU1117B-3.3">- <wire x1="-12.7" y1="2.54" x2="12.7" y2="2.54" width="0.254" layer="94"/>- <wire x1="12.7" y1="2.54" x2="12.7" y2="-5.08" width="0.254" layer="94"/>- <wire x1="12.7" y1="-5.08" x2="-12.7" y2="-5.08" width="0.254" layer="94"/>- <wire x1="-12.7" y1="-5.08" x2="-12.7" y2="2.54" width="0.254" layer="94"/>- <text x="0.0000" y="5.0800" size="1.27" layer="95" align="center">>NAME</text>- <text x="0.0000" y="-7.6200" size="1.27" layer="96" align="center">>VALUE</text>- <pin name="GND" x="-17.78" y="0" length="middle" direction="pwr"/>- <pin name="OUTPUT" x="-17.78" y="-2.54" length="middle" direction="out"/>- <pin name="IN" x="17.78" y="0" length="middle" direction="pwr" rot="R180"/>+<symbol name="TO-252-2">+ <description>TO-252-2 (symbol synthesized from footprint pads)</description>+ <wire x1="-7.62" y1="3.81" x2="7.62" y2="3.81" width="0.254" layer="94"/>+ <wire x1="7.62" y1="3.81" x2="7.62" y2="-3.81" width="0.254" layer="94"/>+ <wire x1="7.62" y1="-3.81" x2="-7.62" y2="-3.81" width="0.254" layer="94"/>+ <wire x1="-7.62" y1="-3.81" x2="-7.62" y2="3.81" width="0.254" layer="94"/>+ <text x="0" y="6.35" size="1.27" layer="95" align="bottom-center">>NAME</text>+ <text x="0" y="-6.35" size="1.27" layer="96" align="top-center">>VALUE</text>+ <pin name="1" x="-12.7" y="2.54" length="short" direction="pas"/>+ <pin name="2" x="-12.7" y="0" length="short" direction="pas"/>+ <pin name="3" x="12.7" y="2.54" length="short" direction="pas" rot="R180"/> </symbol> </symbols> <devicesets>-<deviceset name="CJU1117B-3.3" prefix="U">- <description></description>+<deviceset name="TO-252-2" prefix="U">+ <description>TO-252-2 (symbol synthesized from footprint pads)</description> <gates>- <gate name="G$1" symbol="CJU1117B-3.3" x="0" y="0"/>+ <gate name="G$1" symbol="TO-252-2" x="0" y="0"/> </gates> <devices> <device name="" package="TO-252-2"> <connects>- <connect gate="G$1" pin="GND" pad="1"/>- <connect gate="G$1" pin="OUTPUT" pad="2"/>- <connect gate="G$1" pin="IN" pad="3"/>+ <connect gate="G$1" pin="1" pad="1"/>+ <connect gate="G$1" pin="2" pad="2"/>+ <connect gate="G$1" pin="3" pad="3"/> </connects> <technologies><technology name=""/></technologies> </device>
page.json+14−11@@ -15,7 +15,7 @@ "mpn": "CJU1117B-3.3", "manufacturer": "Changjing", "package": "TO-252-2",- "pin_count": 3,+ "pin_count": 4, "category": "PMIC", "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators", "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2206081716_Jiangsu-Changjing-Electronics-Technology-Co---Ltd--CJU1117B-3-3_C3031942.pdf",@@ -32,19 +32,25 @@ "number": "1", "name": "GND", "type": "power_in",- "description": "Ground reference for the fixed-output CJU1117B-3.3 variant. On the ADJ variant this pin is the ADJ feedback input tied to a resistor divider; on fixed-voltage variants it is tied directly to the system ground."+ "description": "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." }, { "number": "2", "name": "OUTPUT", "type": "power_out",- "description": "Regulated 3.3V output (3.234V-3.366V over line/load). Rated for 1A continuous. Requires a 22 uF tantalum output capacitor for stability per the typical application circuit."+ "description": "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." }, { "number": "3", "name": "IN", "type": "power_in",- "description": "Unregulated input supply. Recommended operating range 4.8V-12V for the 3.3V variant (Vin absolute max 20V). Requires a 10 uF tantalum input capacitor."+ "description": "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."+ },+ {+ "number": "4",+ "name": "OUTPUT (TAB)",+ "type": "power_out",+ "description": "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)." } ], "provenance": {@@ -57,8 +63,8 @@ }, "cad": "KiCad official (CC-BY-SA 4.0)", "pins": {- "total": 3,- "described": 3,+ "total": 4,+ "described": 4, "cites_pages": true, "refuses_to_fabricate": true }@@ -73,7 +79,7 @@ "Manufacturer": "Changjing", "Package": "TO-252-2", "Category": "PMIC",- "Pins": "3"+ "Pins": "4" } }, "sections": [@@ -108,8 +114,5 @@ "docs/cju1117b-3-3-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": {- "public": true- }+ ] }