RT7248
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
80
Output Voltage vs. Input Voltage
3.330
Efficiency (%)
70
60
50
40
30
20
10
0
0
0.25
Output Voltage (V)
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
3.320
3.310
3.300
3.290
3.280
V
OUT
= 3.3V
3.270
0.5
0.75
1
1.25
1.5
1.75
2
V
OUT
= 3.3V, I
OUT
= 1A
4
6
8
10
12
14
16
18
Output Current (A)
Input Voltage (V)
Reference Voltage vs. Temperature
0.950
0.945
Output Voltage vs. Output Current
3.310
3.308
Reference Voltage (V)
0.935
0.930
0.925
0.920
0.915
0.910
0.905
0.900
-50
-25
0
25
50
75
100
125
Output Voltage (V)
0.940
3.306
3.304
3.302
3.300
3.298
3.296
3.294
V
IN
= 17V
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 4.5V
V
IN
= 17V
V
IN
= 12V
V
OUT
= 3.3V
3.292
0
0.25
0.5
0.75
1
1.25
V
OUT
= 3.3V
1.5
1.75
2
Temperature (°C)
Output Current (A)
Switching Frequency vs. Input Voltage
380
380
Switching Frequency vs. Temperature
Switching Frequency (kHz)
1
370
360
350
340
330
320
310
Switching Frequency (kHz)
1
370
360
350
340
330
320
310
V
IN
= 17V
V
IN
= 12V
V
IN
= 4.5V
V
OUT
= 3.3V, I
OUT
= 0A
300
3
6
9
12
15
18
300
-50
-25
0
25
50
75
V
OUT
= 3.3V
100
125
Input Voltage (V)
Temperature (°C)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7248-01
September 2012
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
