RT7253A
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
80
Reference Voltage vs. Input Voltage
0.820
0.815
0.810
0.805
0.800
0.795
0.790
0.785
Efficiency (%)
70
60
50
40
30
20
10
0
0
0.5
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 18V
Reference Voltage (V)
V
OUT
= 3.3V
0.780
1
1.5
2
2.5
3
V
OUT
= 3.3V, I
OUT
= 0A
4
6
8
10
12
14
16
18
Output Current (A)
Input Voltage (V)
Reference Voltage vs. Temperature
0.820
0.815
Output Voltage vs. Output Current
3.340
3.330
Reference Voltage (V)
Output Voltage (V)
0.810
0.805
0.800
0.795
0.790
0.785
3.320
3.310
3.300
3.290
3.280
3.270
V
IN
= 12V
V
IN
= 17V
V
IN
= 12V, V
OUT
= 3.3V
0.780
-50
-25
0
25
50
75
100
125
3.260
3.250
0
0.5
1
1.5
2
V
OUT
= 3.3V
2.5
3
Temperature (°C)
Output Current (A)
Frequency vs. Input Voltage
380
370
Frequency vs. Temperature
380
370
Frequency (kHz)
Frequency (kHz)
360
350
340
330
320
310
360
350
340
330
320
310
V
OUT
= 3.3V, I
OUT
= 0A
300
4
6
8
10
12
14
16
18
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A
300
-50
-25
0
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
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6
DS7253A-02 March 2011
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
