RT7272B
Typical Operating Characteristics
Efficiency vs. Output Current
100
90
80
100
90
80
Efficiency vs. Output Current
Efficiency (%)
Efficiency (%)
70
60
50
40
30
20
10
0
0.01
70
60
50
40
30
20
V
IN
=
V
IN
=
V
IN
=
V
IN
=
4.5V
12V
24V
36V
V
IN
=
V
IN
=
V
IN
=
V
IN
=
4.5V
12V
24V
36V
V
OUT
= 3.3V
0.1
10
0
0
0.5
1
1.5
2
V
OUT
= 3.3V
2.5
3
Output Current (A)
Output Current (A)
Reference Voltage vs. Input Voltage
0.810
0.808
0.810
Reference vs. Temperature
Reference Voltage (V)
Reference Voltage(V)
0.805
0.803
0.800
0.798
0.795
0.793
0.805
0.800
0.795
V
IN
=
V
IN
=
V
IN
=
V
IN
=
4.5V
12V
24V
36V
V
OUT
= 3.3V, I
OUT
= 0.3A
V
IN
= 4.5V to 36V, V
OUT
= 3.3V, I
OUT
= 0.3A
0.790
2
9.6
17.2
24.8
32.4
40
0.790
-50
-25
0
25
50
75
100
125
Input Voltage(V)
Temperature (°C)
Output Voltage vs. Output Current
3.38
500
Switching Frequency vs. Input Voltage
Switching Frequency (kHz)
1
495
490
485
480
475
470
465
460
455
450
4
8
12
16
20
3.37
3.36
Output Voltage (V)
3.35
3.34
3.33
3.32
3.31
3.30
3.29
0
0.5
1
1.5
2
2.5
3
V
IN
=
V
IN
=
V
IN
=
V
IN
=
4.5V
12V
24V
36V
V
OUT
= 3.3V, I
OUT
= 0.1A to 3A
V
OUT
= 3.3V, I
OUT
= 0.3A
24
28
32
36
Output Current (A)
Input Voltage (V)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7272B-01 January 2013
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
