RT7256B
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
80
70
Output Voltage vs. Input Voltage
4.2
4.0
Output Voltage (V)
V
OUT
= 3.3V
V
IN
= 12V
V
IN
= 17V
3.8
3.6
3.4
3.2
3.0
2.8
2.6
Efficiency (%)
60
50
40
30
20
10
0
0.01
0.1
1
10
V
OUT
= 3.3V, I
OUT
= 0.6A
2.4
4
5
6
7
8
9
10 11 12 13 14 15 16 17
Output Current (A)
Input Voltage (V)
Output Voltage vs. Temperature
4.0
3.8
4.0
Output Voltage vs. Load Current
3.6
Output Voltage (V)
3.6
3.4
3.2
3.0
Output Voltage (V)
3.2
2.8
V
IN
= 17V
V
IN
= 12V
V
IN
= 6V
2.4
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0.6A
2.8
-50
-25
0
25
50
75
100
125
2.0
0
0.5
1
1.5
2
V
OUT
= 3.3V
2.5
3
Temperature (°C)
Load Current (A)
Switching Frequency vs. Input Voltage
1400
1350
1400
1350
Switching Frequency vs. Temperature
Frequency (kHz)1
Frequency (kHz)1
V
OUT
= 3.3V, I
OUT
= 0.6A
1300
1250
1200
1150
1100
4.5
7
9.5
12
14.5
17
1300
1250
1200
1150
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0.6A
1100
-50
-25
0
25
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
DS7256B-00
February 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
