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SI-3033LU View Datasheet(PDF) - Sanken Electric co.,ltd.

Part Name
Description
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SI-3033LU Datasheet PDF : 4 Pages
1 2 3 4
qSI-3000LU Series
sBlock Diagram
VIN 4
SI-3012LU
VC 3
+
REF
TSD
5 VO
SI-3018LU, SI-3025LU, SI-3033LU, SI-3050LU
VIN 4
5 VO
1 Adj
2 GND
3
+
REF
TSD
1 Adj
2 GND
sStandard External Circuit
SI-3018LU, SI-3025LU, SI-3033LU, SI-3050LU
+
CIN
VIN
VO
4
5
VC
VDJ
3
1
2
GND
+
CO
SI-3012LU
VIN
4
VO
5
+ CIN
3
R1
+
1
VIN
2
R2
GND
CO
VC
CO : Output capacitor (10µF or larger)
The SI-3000LU series can be operated on the circuit
even if a low ESR ceramic capacitor is used as the output
capacitor.
CIN : Input capacitor (0.1 to 10 µF)
This capacitor is required in the case of an inductive input
line or long wiring.
Settings for 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 kis recommended
R1=(VO–VADJ)/(VADJ/R2)
sReference Data
Copper Laminate Area vs Power Dissipation
Tj=100°C PWB size 40×40
1
Ta=25°C
0.9
Ta=40°C
0.8
Ta=60°C
Ta=85°C
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
10
100
1000
Copper Laminate Area (mm2)
• A monolithic IC is mounted.The inner frame stage is connected
to the GND pin (pin 2). Therefore, enlarging the copper lami-
nate area leading to the GND pin achieves a heat radiation
effect.
• How to calculate the junction temperature
Measure the temperature (TC) of the GND pin (pin 2) lead
section using a thermistor, etc. Substitute this value in the
following formula and calculate the junction temperature.
Tj=PD×θj–c+Tc (θj–c=5°C/W)
 

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