DS8048-01 Datasheet, PDF (6/11 Pages) Richtek Technology Corporation – 3MHz 1A Step-Down Converter

RT8048
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
80
VIN = 3.3V
70
VIN = 5V
60
50
40
30
20
10
VOUT = 1.2V, L = 1μH
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
Reference Voltage vs. Temperature
0.620
0.615
0.610
0.605
0.600
0.595
0.590
0.585
0.580
-50 -25
0
25 50 75
Temperature (°C)
100 125
2.6
2.3
2.0
1.7
1.4
1.1
0.8
0.5
2.5
Current Limit vs. Input Voltage
VOUT = 1.2V
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
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6
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs. Output Current
VIN = 5V, VOUT = 3.3V, L = 1μH
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
-50
Frequency vs. Temperature
VIN = 5V, VOUT = 3.3V, IOUT = 0.3A
-25
0
25 50 75 100 125
Temperature (°C)
Current Limit vs. Temperature
2.1
1.9
VOUT = 1.2
1.7
1.5
VOUT = 3.3
1.3
1.1
-50 -25
VIN = 5V
0
25 50 75 100 125
Temperature (°C)
DS8048-01 June 2011