RT8010/A
Typical Operating Characteristics
Efficiency vs. Output Current
Efficiency vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
100
90
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
70
80
VIN = 5.0V
VIN = 3.3V
VIN = 2.5V
60
50
40
30
20
10
VOUT = 1.2V, COUT = 4.7μF, L = 4.7μH
VOUT = 3.3V, COUT = 4.7μF, L = 4.7μH
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Output Current (A)
1
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Output Current (A)
1
Efficiency vs. Output Current
UVLO Voltage vs.Temperature
100
90
80
70
60
50
40
30
20
10
0
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
Rising
VIN = 5.0V
VIN = 3.3V
VIN = 2.5V
Falling
VOUT = 1.2V, IOUT = 0A
VOUT = 1.2V, COUT = 10μF, L = 2.2μH
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Output Current (A)
1
-40 -25 -10
5
20 35 50 65 80 95 110 125
(°C)
Temperature
EN Pin Threshold vs. Input Voltage
EN Pin Threshold vs. Temperature
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
Rising
Falling
Rising
Falling
VOUT = 1.2V, IOUT = 0A
VIN = 3.6V, VOUT = 1.2V, IOUT = 0A
2.5 2.8 3.1 3.4 3.7
4
4.3 4.6 4.9 5.2 5.5
-40 -25 -10
5
20 35 50 65 80 95 110 125
(°C)
Temperature
Input Voltage (V)
www.richtek.com
6
DS8010/A-02 March 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
