RT8271
Typical Operating Characteristics
Efficiency vs. Load Current
100
90
80
4.0
Current Limit vs. Duty Ratio
3.8
V
OUT
= 3.3V
V
OUT
= 2.5V
60
50
40
30
20
10
0
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
Current Limit (A)
V
IN
= 12V
Efficiency (%)
70
3.6
3.4
3.2
3.0
2.8
2.6
0
10
20
30
40
50
60
70
80
90
Load Current (A)
Duty Ratio (%)
Reference Voltage vs. Temperature
0.930
0.925
0.920
0.915
0.910
0.905
2.528
2.526
Output Voltage vs. Load Current
Reference Voltage (V)
Output Voltage (V)
V
IN
= 12V, I
OUT
= 0A
2.524
2.522
2.520
2.518
V
IN
= 12V
2.516
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
0.900
-50
-25
0
25
50
75
100
125
Temperature (°C)
Load Current (A)
Quiescent Current vs. Temperature
0.80
0.75
0.70
0.65
0.60
0.55
22
21
20
19
18
17
16
Shutdown Current vs. Input Voltage
V
IN
= 12V
0.50
-50
-25
0
25
50
75
100
125
3
6
9
12
15
18
21
24
Shutdown Current (µA)1
Quiescent Current (mA)
Temperature (°C)
Input Voltage (V)
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6
DS8271-02 March 2011
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
