RT7251A/B
Typical Operating Characteristics
Efficiency vs. Load Current
100
90
80
Efficiency vs. Load Current
100
90
Efficiency (%)
Efficiency (%)
70
60
50
40
30
20
10
0
0.01
0.1
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 1.2V
80
70
60
50
40
30
20
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 1.2V
RT7251A, V
IN
= 12V
1
10
10
0
0.01
0.1
RT7251B, V
IN
= 12V
1
10
Load Current (A)
Load Current (A)
Output Voltage vs. Load Current
3.32
3.30
3.38
3.36
Output Voltage vs. Load Current
Output Voltage (V)
3.26
3.24
3.22
3.20
Output Voltage (V)
RT7251A, V
IN
= 12V, V
OUT
= 3.3V
3.28
3.34
3.32
3.30
3.28
3.26
3.18
0
0.25
0.5
0.75
1
1.25
1.5
RT7251B, V
IN
= 12V, V
OUT
= 3.3V
3.24
0
0.25
0.5
0.75
1
1.25
1.5
Load Current (A)
Load Current (A)
Reference Voltage vs. Temperature
0.82
0.81
0.80
0.79
0.78
0.77
Reference Voltage vs. Temperature
0.82
0.81
0.80
0.79
0.78
0.77
Reference Voltage (V)
Reference Voltage (V)
RT7251A, V
IN
= 12V, I
OUT
= 0.3A
0.76
-50
-25
0
25
50
75
100
125
RT7251B, V
IN
= 12V, I
OUT
= 0.3A
0.76
-50
-25
0
25
50
75
100
125
Temperature (°C)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
Temperature (°C)
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS7251A/B-01 April 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
