EUP8086
Typical Operating Characteristics-Step-Down Converter
BUCK Efficiency vs Load Current (Vout=1.5V)
BUCK Efficiency vs Load Current (Vout=1.8V)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN=2.7V
VIN=3.8V
VIN=4.2V
VIN=2.7V
VIN=3.6V
VIN=4.2V
L=2.2uH
C=10uF
L=2.2uH
C=10uF
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
BUCK Efficiency vs Load Current (VOUT=1.2V)
Reference Voltage vs Temperature (VIN=3.6V)
100
90
80
70
60
50
40
30
20
10
0
0.610
0.605
0.600
0.595
0.590
0.585
VIN=2.7V
VIN=3.6V
VIN=4.2V
L=2.2uH
C=10uF
L=2.2uH
C=10uF
0.1
1
10
100
1000
-40
-20
0
20
40
60
80
TEMPERATURE (oC)
LOAD CURRENT (mA)
Output Voltage vs Temperature (VIN=3.6V,ILoad=1mA)
Output Voltage vs Input Voltage (VIN=3.6V,ILoad=1mA)
1.92
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.96
1.92
1.88
1.84
1.80
1.76
1.72
1.68
1.64
1.60
L=2.2uH
C=10uF
RFB1=620Kohm
RFB2=300Kohm
L=2.2uH
C=10uF
RFB1=620Kohm
RFB2=300Kohm
2.5
3.0
3.5
4.0
4.5
5.0
-40
-20
0
20
40
60
80
100
TEMPERATURE (oC)
INPUT VOLTAGE (V)
DS8086 Ver 1.0 Apr. 2008
10
EUTECH [ EUTECH MICROELECTRONICS INC ]
