RT7257C
Current Limit vs. Temperature
8
7
Load Transient Response
Current Limit (A)
6
5
4
3
V
OUT
(100mV/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0.2A to 3A
2
-50
-25
0
25
50
75
100
125
Time (250μs/Div)
Temperature (°C)
Load Transient Response
V
OUT
(10mV/Div)
Switching
V
OUT
(100mV/Div)
V
SW
(10V/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1.5A to 3A
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 3A
Time (250μs/Div)
Time (1μs/Div)
Power On from VIN
Power Off from VIN
V
IN
(5V/Div)
V
OUT
(2V/Div)
I
L
(2A/Div)
V
IN
(5V/Div)
V
OUT
(2V/Div)
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 3A
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 3A
Time (5ms/Div)
Time (5ms/Div)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7257C-02
September 2012
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
