RT7285C
7
DS7285C-03 July 2014
www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Time (1
μ
s/Div)
Switching
V
OUT
(20mV/Div)
I
L
(1A/Div)
V
IN
= 12V, V
OUT
= 1.2V, I
OUT
= 1.5A
V
SW
(10V/Div)
Time (1
μ
s/Div)
Switching
V
IN
= 12V, V
OUT
= 1.2V, I
OUT
= 0.75A
V
OUT
(20mV/Div)
I
L
(1A/Div)
V
SW
(10V/Div)
Time (100
μ
s/Div)
Load Transient Response
V
OUT
(20mV/Div)
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 1.2V, I
OUT
= 0.75A to 1.5A
Switching Frequency vs. Temperature
450
470
490
510
530
550
570
590
610
630
650
-50
-25
0
25
50
75
100
125
Temperature (°C)
Sw
itc
h
ing Fr
equency (
kH
z)
1
V
OUT
= 1.2V
V
IN
= 6V
V
IN
= 12V
V
IN
= 18V
V
IN
= 4.5V
Current Limit vs. Temperature
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
-50
-25
0
25
50
75
100
125
Temperature (°C)
C
u
rre
n
t L
im
it (A
)
V
IN
= 6V
V
IN
= 12V
V
IN
= 18V
Time (100
μ
s/Div)
Load Transient Response
V
OUT
(20mV/Div)
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 1.2V, I
OUT
= 0A to 1.5A
