RT7297B
6
DS7297B-02 September 2012
www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Typical Operating Characteristics
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
3
Load Current (A)
E
ff
ici
ency (
%
)
V
OUT
= 3.3V
V
IN
= 12V
V
IN
= 17V
Output Voltage vs. Temperature
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
-50
-25
0
25
50
75
100
125
Temperature (°C)
O
u
tp
ut
V
o
lt
age (
V
)
V
IN
= 12V, V
OUT
= 3.3V
Output Voltage vs. Load Current
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
0
0.5
1
1.5
2
2.5
3
Load Current (A)
O
u
tp
ut
V
o
lt
age (
V
)
V
OUT
= 3.3V
V
IN
= 12V
V
IN
= 17V
Switching Frequency vs. Temperature
1.10
1.11
1.12
1.13
1.14
1.15
1.16
1.17
1.18
1.19
1.20
1.21
1.22
1.23
1.24
-50
-25
0
25
50
75
100
125
Temperature (°C)
S
w
it
chi
ng Fr
equency (
k
H
z
)
1
V
OUT
= 3.3V, I
OUT
= 0A
V
IN
= 17V
V
IN
= 12V
Switching Frequency vs. Input Voltage
1.16
1.17
1.18
1.19
1.20
1.21
1.22
1.23
1.24
1.25
1.26
4.5
7
9.5
12
14.5
17
Input Voltage (V)
Sw
it
chi
n
g Fr
equency (
M
H
z
)
1
V
IN
= 4.5V to 17V, V
OUT
= 3.3V, I
OUT
= 0A
Output Voltage vs. Input Voltage
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
4
6
8
10
12
14
16
18
Input Voltage (V)
O
u
tput
Vol
tage (
V
)
V
IN
= 4.5V to 17V
