RT8008
Typical Operating Characteristics
Efficiency vs. Input Voltage
Efficiency vs. Load Current
100
90
80
70
60
50
40
100
IOUT = 300mA
VIN = 3.3V
90
80
IOUT = 600mA
VIN = 5V
70
60
50
VOUT = 1.2V
5.5
VOUT = 1.2V
0.51 0.61
40
0.01
0.11
0.21
0.31
0.41
2.5
3
3.5
4
4.5
5
Input Voltage (V)
Load Current (A)
Output Voltage vs. Load Current
Current Limit vs. Input Voltage
1.220
1.215
1.210
1.205
1.200
1.195
1.190
1.185
1.180
2.5
2.0
1.5
1.0
0.5
0.0
VIN = 3.3V
VIN = 5V
VIN = 2.5V
VOUT = 1.2V
VOUT = 1.2V
5.5
0
0.1
0.2
0.3
0.4
0.5
0.6
2.5
3
3.5
4
4.5
5
Load Current (A)
Input Voltage (V)
Frequency vs. Input Voltage
Frequency vs. Temperature
1.50
1.48
1.45
1.43
1.40
1.38
1.35
1.50
1.48
1.45
1.43
1.40
1.38
1.35
VOUT = 1.2V, IOUT = 300mA
VOUT = 1.2V, IOUT = 300mA
4.5 5.5
-50
-25
0
25
50
75
100
125
2.5
3
3.5
4
5
Temperature
(°C)
Input Voltage (V)
www.richtek.com
6
DS8008-04 March 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
