RT7258
Current Limit vs. Temperature
18
17
Load Transient Response
Output Current (A)
16
15
14
13
12
11
V
OUT
(100mV/Div)
I
OUT
(5A/Div)
V
IN
= 12V, V
OUT
= 3.3V
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A to 8A
10
-50
-25
0
25
50
75
100
125
Time (500μs/Div)
Temperature (°C)
Load Transient Response
V
OUT
(5mV/Div)
V
OUT
(100mV/Div)
V
SW
(10V/Div)
I
OUT
(5A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 4A to 8A
Output Ripple Voltage
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 4A
Time (500μs/Div)
Time (1μs/Div)
Output Ripple Voltage
V
OUT
(5mV/Div)
V
IN
(5V/Div)
V
OUT
(2V/Div)
I
L
(5A/Div)
I
L
(10A/Div)
Power On from VIN
V
SW
(10V/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 8A
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 8A
Time (1μs/Div)
Time (5ms/Div)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7258-00 January 2012
www.richtek.com
9
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
