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SI-3012LU Datasheet(PDF) 2 Page - Sanken electric

Part No. SI-3012LU
Description  Surface-Mount, Low Current Consumption, Low Dropout Voltage
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Maker  SANKEN [Sanken electric]
Homepage  http://www.sanken-ele.co.jp/en
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SI-3012LU Datasheet(HTML) 2 Page - Sanken electric

   
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69
ICs
SI-3000LU Series
■External Dimensions (SOT89-5)
Pin Assignment
q ADJ
w GND
e VC
r VIN
t VO
Plastic Mold Package Type
Flammability: UL94V-0
Product Mass: Approx. 0.05g
(Unit : mm)
4.5±0.05
0.1±0.05
0.4±0.03
1.6±0.05
4.2±0.05
4.2±0.05
4.2±0.05
4.2±0.05
4.2±0.05
4.7±0.05
1.5±0.05
1.5±0.05
( 1.0
±0.0
5 )
φ
tr
qw
e
■Block Diagram
■Typical Connection Diagram
■Reference Data
CO: Output capacitor (10 µF or larger)
For SI-3000LU series, Co has to be a low ESR capacitor such as a
ceramic capacitor.
CIN: Input capacitor (10 µF approx.)
Setting of SI-3012LU output voltage (recommended voltage: 1.5 V to 15 V)
R1 and R2: Resistors for output setting
The output voltage can be set by connecting R1 and R2 as shown in the
diagram on the left.
R2: 100 kΩ is recommended
R1=(VO–VADJ)/(VADJ/R2)
SI-3012LU
REF
TSD
+
VIN
VC
VO
GND
4
3
5
2
ADJ
1
Copper Laminate Area vs Power Dissipation
Tj=100°C PCB size 40×40
SI-3012LU
4
3
2
5
1
+
VIN
VIN
VC
VO
ADJ
CIN
R1
R2
GND
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
10
100
1000
Copper Laminate Area (mm2)
Ta=25°C
Ta=40°C
Ta=60°C
Ta=85°C
Case temperature Tc
measurement point
•A monolithic ICs mounts an inner frame stage that is connected to the GND
pin (pin 2). Therefore, enlarging the copper laminate area connected to the
GND pin improves heat radiation effect.
• Obtaining the junction temperature
Measure the temperature TC at the lead part of the GND pin (pin 2) with a
thermocouple, etc. Then, substitute this value in the following formula to
obtain the junction temperature.
Tj=PD×θj–c+Tc
(θj–c=5°C/W)


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