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SI-3120KM View Datasheet(PDF) - Sanken Electric co.,ltd.

Part NameSI-3120KM SANKEN
Sanken Electric co.,ltd. SANKEN
DescriptionSurface Mount, Low Current Consumption, Low Dropout Voltage Linear Regulator ICs
SI-3120KM Datasheet PDF : 3 Pages
1 2 3
1-1-1 Linear Regulator ICs
Block Diagram
SI-3010KM/SI-3012KM
VIN 2
VC 1
-
+
REF
TSD
4 VOUT
5 ADJ
3 GND
SI-3025KM/SI-3033KM/SI-3050KM/SI-3090KM/SI-3120KM
VIN 2
VC 1
-
+
REF
TSD
4 VO
5
Sense
3 GND
Typical Connection Diagram
SI-3025KM/SI-3033KM/SI-3050KM/
SI-3090KM/SI-3120KM
+
CIN
D1*2
VIN
VO
2
4
VC
1
sense
GND 5
3
*1
+
CO
SI-3010KM/SI-3012KM
+
CIN
D1*2
VIN
VO
2
4
VC GND ADJ
1 35
*3
R3
*1
R1
+
CO
R2
CIN: Input capacitor (22 µF or larger)
CO: Output capacitor
*1: SI-3012KM/3025KM/3033KM (22 µF or larger)
It comes with a circuit configuration that uses a low ESR capacitor for the output
capacitor.
If an electrolytic capacitor is used, oscillation may occur at a low temperature.
SI-3010KM/3050KM/3090KM/3120KM (47 µF or larger)
If a low ESR capacitor is used, oscillation may occur.
*2: D1: Reverse bias protection diode
This diode is required for protection against reverse biasing between the input
and output.
(Sanken SJPL-H2 is recommended.)
This diode is not required at VO 3.3 V.
R1, R2: Output voltage setting resistors
Output voltage can be set by connecting R1 and R2 as shown
above.
R2: 10 kis recommended (24 kfor SI-3012KM).
R1=(VO–VADJ)÷(VADJ/R2)
*3: For SI-3010KM, insert R3 in case of setting VO to VO
1.5V.
Recommended value for R3 is 10k.
Reference Data
Copper Laminate Area-Thermal Resistance
100
90
80
70
60
50
40
10
Glass-epoxy board : 30×30mm
100
Copper Laminate Area (mm2)
1000
Copper Laminate Area-Power Dissipation
Glass-epoxy board : 30×30mm
1.5
Ta=25°C
1
40°C
0.5
0
10
100
Copper Laminate Area (mm2)
60°C
85°C
1000
• Obtaining the junction temperature
Measure the temperature TC at the lead part
of the GND pin with a thermocouple, etc.
Then, substitute this value in the following
formula to obtain the junction temperature.
Tj=PD × θj–C + TC ( θj–C = 6°C/W)
Case temperature Tc
measurement point
18 ICs
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