芯美 子
Preliminary
EUP8080
Typical Operating Characteristics (Continued)
BUCK Efficiency vs Load Current (Vout=1.5V)
BUCK Efficiency vs Load Current (Vout=1.2V)
Power Save
100
100
90
80
70
60
50
40
30
20
10
0
Power Save
90
80
70
BAT=2.7V
BAT=2.7V
60
BAT=2.7V
BAT=3.8V
BAT=3.8V
BAT=2.7V
50
BAT=4.2V
BAT=3.8V
BAT=4.2V
40
BAT=3.8V
PWM
PWM
BAT=4.2V
30
BAT=4.2V
L=2.2uH
C=10uF
L=2.2uH
20
C=10uF
10
0
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
BUCK Efficiency vs Input Voltage (PWM Vout=1.8V)
Reference Voltage vs Temperature (VIN=3.8V)
100
0.610
0.605
0.600
0.595
0.590
0.585
95
90
85
80
75
70
65
60
55
50
IOUT=100mA
IOUT=600mA
IOUT=10mA
L=2.2uH
C=10uF
L=2.2uH
C=10uF
2
3
4
5
6
-40
-20
0
20
40
60
80
TEMPERATURE (oC)
INPUT VOLTAGE (V)
Output Voltage vs Temperature (BAT=3.8V,ILoad=1mA)(Power Save)
Output Voltage vs Temperature (BAT=3.8V,ILoad=1mA)(PWM)
1.96
1.94
1.92
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.92
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.70
1.68
L=2.2uH
C=10uF
R1=620Kohm
R2=300Kohm
1.66
1.64
1.62
1.60
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
TEMPERATURE (oC)
TEMPERATURE (oC)
DS8080 Ver 0.1 Aug. 2007
9
系 ：15999644579 83151715
EUTECH [ EUTECH MICROELECTRONICS INC ]
