RT7278
Current Limit vs. Temperature
6.0
Currrent Limit vs. Input Voltage
6.0
5.6
5.6
Current Limit (A)
Currrent Limit (A)
V
IN
= 12V, V
OUT
= 1.05V
5.2
5.2
4.8
4.8
4.4
4.4
V
OUT
= 1.05V
4.0
4
6
8
10
12
14
16
18
4.0
-50
-25
0
25
50
75
100
125
Temperature (°C)
Input Voltage (V)
Load Transient Response
Load Transient Response
V
OUT
(50mV/Div)
V
OUT
(20mV/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 10mA to 3A
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 1A to 3A
Time (250μs/Div)
Time (100μs/Div)
Output Ripple Voltage
Output Ripple Voltage
V
OUT
(10mV/Div)
V
OUT
(10mV/Div)
V
LX
(10V/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
V
LX
(10V/Div)
V
IN
= 12V, V
OUT
= 5V, I
OUT
= 3A
Time (1μs/Div)
Time (1μs/Div)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS7278-00 January 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
