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