RT7270
Typical Operating Characteristics
Efficiency vs. Load Current
100
90
80
3.34
3.33
Output Voltage vs. Input Voltage
Efficiency (%)
70
60
50
40
30
20
10
0
0
0.5
1
Output Voltage(V)
V
OUT
= 3.3V
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
3.32
3.31
3.30
3.29
3.28
3.27
V
IN
= 4.5V to 17V
3.26
3
4
6
8
10
12
14
16
18
1.5
2
2.5
Load Current (A)
Input Voltage(V)
Output Voltage vs. Temperature
3.34
3.33
Output Voltage vs. Output Current
3.34
3.33
Output Voltage (V)
Output Voltage (V)
3.32
3.31
3.30
3.29
3.28
3.27
3.32
3.31
3.30
3.29
3.28
3.27
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 17V
V
IN
= 12V, V
OUT
= 3.3V
3.26
-50
-25
0
25
50
75
100
125
V
OUT
= 3.3V
3.26
0
0.5
1
1.5
2
2.5
3
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
IN
= 4.5V to 17V, V
OUT
= 3.3V, I
OUT
= 0A
300
4.5
7
9.5
12
14.5
17
300
-50
-25
0
25
V
OUT
= 3.3V, I
OUT
= 0A
50
75
100
125
Input Voltage (V)
Temperature (°C)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS7270-01
September 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
