RT8251
Typical Operating Characteristics
Efficiency vs. Load Current
100
90
80
Efficiency vs. Load Current
100
V
IN
= 12V
V
IN
= 24V
V
IN
= 12V
V
IN
= 24V
90
80
Efficiency (%)
60
50
40
30
20
10
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Efficiency(%)
V
OUT
= 3.3V
70
70
60
50
40
30
20
10
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
V
OUT
= 5V
Load Current (A)
Load Current (A)
Output Voltag Deviation vs. Load Current
2
Output Voltage Deviation vs. Input Voltage
2
V
IN
= 24V
I
OUT
= 5A
I
OUT
= 3A
I
OUT
= 0A
Output Voltage Deviation (%)1
Output Voltage Deviation (%)1
1.5
1
0.5
0
-0.5
-1
-1.5
V
IN
= 12V
V
IN
= 5V
1.5
1
0.5
0
-0.5
-1
-1.5
V
OUT
= 3.3V
-2
0.001
0.01
0.1
1
10
V
OUT
= 3.3V
-2
4
6.5
9
11.5
14
16.5
19
21.5
24
Load Current (A)
Input Voltage (V)
Quiescent Current vs. Temperature
1.2
1
0.816
0.811
Reference Voltage vs. Temperature
Quiescent Current (mA)
Reference Voltage (V)
V
IN
= 12V
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
75
100
125
0.806
0.801
0.796
0.791
V
IN
= 12V
0.786
-50
-25
0
25
50
75
100
125
Temperature (
°
C)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
Temperature (
°
C)
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS8251-04 February 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
