RT7272B
Typical Operating Characteristics
Efficiency vs. Output Current
Efficiency vs. Output Current
100
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
VIN = 4.5V
VIN = 12V
VIN = 24V
VIN = 4.5V
50
VIN = 36V
V
V
IN = 12V
IN = 24V
40
30
20
10
0
VIN = 36V
VOUT = 3.3V
0.1
VOUT = 3.3V
2.5 3
0.01
0
0.5
1
1.5
2
Output Current (A)
Output Current (A)
Reference Voltage vs. Input Voltage
Reference vs. Temperature
0.810
0.808
0.805
0.803
0.800
0.798
0.795
0.793
0.790
0.810
0.805
0.800
0.795
0.790
VIN = 4.5V
VIN = 12V
VIN = 24V
VIN = 36V
VOUT = 3.3V, IOUT = 0.3A
25 50 75 100 125
VIN = 4.5V to 36V, VOUT = 3.3V, IOUT = 0.3A
9.6 17.2 24.8 32.4
2
40
-50
-25
0
Input Voltage(V)
Temperature (°C)
Output Voltage vs. Output Current
Switching Frequency vs. Input Voltage
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.30
3.29
500
495
490
485
480
475
470
465
460
455
450
VIN = 4.5V
VIN = 12V
VIN = 24V
VIN = 36V
VOUT = 3.3V, IOUT = 0.1A to 3A
VOUT = 3.3V, IOUT = 0.3A
0
0.5
1
1.5
2
2.5
3
4
8
12
16
20
24
28
32
36
Output Current (A)
Input Voltage (V)
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7272B-05 June 2015
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
