RT7285C
6
DS7285C-03 July 2014
www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Typical Operating Characteristics
Referecnec Voltage vs. Input Voltage
0.590
0.595
0.600
0.605
0.610
4.5
6.5
8.5
10.5
12.5
14.5
16.5
18.5
Input Voltage (V)
R
e
fe
re
cnec Vol
tage (
V
)
V
IN
= 4.5V to 18V, V
OUT
= 1.2V, I
OUT
= 0A
Switching Frequency vs. Input Voltage
500
520
540
560
580
600
4
6
8
10
12
14
16
18
Input Voltage (V)
S
w
itci
ng Fr
equenc
y (
kH
z)
1
V
OUT
= 1.2V, I
OUT
= 0A
Output Voltage vs. Load Current
1.190
1.194
1.198
1.202
1.206
1.210
1.214
1.218
1.222
1.226
1.230
0
0.3
0.6
0.9
1.2
1.5
Load Current (A)
O
u
tp
u
t V
o
lta
g
e
(V
)
V
IN
= 4.5V to 18V, V
OUT
= 1.2V
V
IN
= 18V
V
IN
= 12V
V
IN
= 9V
V
IN
= 5V
V
IN
= 4.5V
Reference vs. Temperature
0.590
0.595
0.600
0.605
0.610
-50
-25
0
25
50
75
100
125
Temperature (°C)
R
e
fe
rence Vol
tage (
V
)
I
OUT
= 0A
V
IN
= 12V
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0
0.3
0.6
0.9
1.2
1.5
Load Current (A)
E
ffi
ci
ency (
%
)
V
OUT
= 1.2V
V
IN
= 5V
V
IN
= 9V
V
IN
= 12V
V
IN
= 18V
Efficiency vs. Load Current
0
10
20
30
40
50
60
70
80
90
100
0
0.3
0.6
0.9
1.2
1.5
Load Current (A)
E
ffi
ci
ency (
%
)
V
OUT
= 5V
V
IN
= 12V
V
IN
= 15V
V
IN
= 18V
