RT8057A
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
80
Output Voltage vs. Input Voltage
2.38
2.36
V
IN
= 5V
Efficiency (%)
70
60
50
40
30
20
10
0
0.0
0.2
0.4
0.6
0.8
1.0
Output Voltage (V)
V
IN
= 3.3V
2.34
2.32
2.30
2.28
2.26
2.24
V
OUT
= 2.3V
2.22
2.5
3.0
3.5
4.0
V
OUT
= 2.3V, I
OUT
= 0A
4.5
5.0
5.5
Output Current (A)
Input Voltage (V)
Frequency vs. Input Voltage
2.40
2.35
2.30
2.25
Frequency vs. Temperature
V
IN
= 3.3V
Frequency (MHz)1
Frequency (MHz)1
2.30
2.25
2.20
2.15
2.10
2.05
2.00
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.20
2.15
2.10
2.05
2.00
1.95
V
IN
= 5V
V
IN
= 5V, V
OUT
= 2.3V,
I
OUT
= 0.2A
V
OUT
= 2.3V, I
OUT
= 0.2A
1.90
-50
-25
0
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
Output Current Limit vs. Input Voltage
1.6
1.5
1.4
1.3
1.2
1.1
1.6
1.5
1.4
1.3
1.2
1.1
Output Current Limit vs. Temperature
Output Current limit (A)
V
OUT
= 2.3V
1.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.0
-50
-25
0
25
Output Current Limit (A)
V
IN
= 5V, V
OUT
= 2.3V
50
75
100
125
Input Voltage (V)
Temperature (°C)
DS8057A-00 March 2011
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5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
