SC220EVB Semtech, SC220EVB Datasheet - Page 6

• Manufacturer Part Number: SC220EVB
• Description: SC220 20 MHz Step-Down Regulator (SOIC-8) Evaluation Board
• Manufacturer: Semtech

Typical Characteristics
100 %
100 %
20 %
10 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
17.5
12.5
10.0
22.5
20.0
15.0
7.5
5.0
2.5
0
0
0
0.001
0.001
V
V
V
2.5
OUT
OUT
OUT
= 1.8V
I
= 1.8V
OUT
= 1.8V
= 200mA
V
Switching Frequency vs. V
IN
3.0
Effi ciency vs. Load Current
Effi ciency vs. Load Current
= 2.7V
V
(Chip Inductor vs. X-EMI
IN
= 3.7V
I
OUT
0.01
0.01
I
3.5
= 650mA
Dashed Lines: Effi ciency with X-EMI
OUT
V
Load Current (A)
Load Current (A)
IN
= 450mA
Input Voltage (V)
= 3.7V
I
OUT
Solid Lines: Effi ciency with chip Inductor
V
IN
= 300mA
V
= 4.2V
4.0
IN
= 2.7V
TM
0.1
0.1
Inductor)
4.5
V
IN
= 4.2V
TM
5.0
IN
Inductor
5.5
1
1
100 %
10.0
20 %
10 %
17.5
12.5
90 %
80 %
70 %
60 %
50 %
40 %
30 %
22.5
20.0
15.0
7.5
5.0
2.5
1.77
1.79
1.78
1.80
0
0
2.5
0.001
V
V
2.5
Nominal V
OUT
OUT
= 1.8V
= 1.0V
Switching Frequency vs. V
3.0
3.0
OUT
V
V
IN
V
= 1.8V
IN
Load Regulation
= 4.2V
IN
I
Effi ciency vs. V
= 5.0V
OUT
I
= 2.7V
OUT
0.01
= 650mA
3.5
= 1mA
Load Current (A)
Input Voltage (V)
3.5
Input Voltage (V)
V
4.0
I
IN
OUT
I
= 3.7V
OUT
I
I
OUT
= 300mA
OUT
4.0
= 200mA
= 300mA
= 450mA
IN
I
0.1
OUT
4.5
= 50mA
4.5
SC220
IN
5.0
5.0
5.5
1
6