RT5028E
Typical Operating Characteristics
CH1 Buck Efficiency vs. Output Current
CH2 Buck Efficiency vs. Output Current
100
100
90
80
70
60
50
40
30
20
10
0
90
80
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 5V
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 5V
70
60
50
40
30
20
10
0
VIN = 5.5V
VIN = 5.5V
VOUT = 1.5V, L = 2.2μH, COUT = 10μF
VOUT = 1.35V, L = 2.2μH, COUT = 10μF
100 1000 10000
10
10
100
1000
10000
Output Current (mA)
Output Current (mA)
CH3 Buck Efficiency vs. Output Current
CH4 Buck Efficiency vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 4.5V
VIN = 5V
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 5V
VIN = 5.5V
VIN = 5.5V
VOUT = 1.2V, L = 2.2μH, COUT = 10μF
VOUT = 3.3V, L = 2.2μH, COUT = 10μF
10
100
1000
10000
10
100
1000
10000
Output Current (mA)
Output Current (mA)
CH1 Buck Output Voltage vs. Output Current
CH2 Buck Output Voltage vs. Output Current
1.39
1.53
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 5V
1.38
1.37
1.36
1.35
1.34
1.33
1.32
1.52
1.51
1.50
1.49
1.48
1.47
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 5V
VIN = 5.5V
VIN = 5.5V
L = 2.2μH, COUT = 10μF
L = 2.2μH, COUT = 10μF
1000 1500 2000
0
300 600 900 1200 1500 1800 2100 2400
Output Current (mA)
0
500
Output Current (A)
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10
DS5028E-00 October 2016
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
