RT7297B
Current Limit vs. Temperature
7.0
6.5
6.0
5.5
5.0
Current Limit vs. Input Voltage
Current Limit (A)
Current Limit (A)
V
IN
= 12V, V
OUT
= 3.3V
6.0
5.5
5.0
4.5
4.0
3.5
3.0
-50
-25
0
25
50
75
100
125
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
4.5
7
9.5
12
14.5
17
V
IN
= 4.5V to 17V, V
OUT
= 3.3V
Temperature (°C)
Input Voltage (V)
Load Transient Response
Load Transient Response
V
OUT
(100mV/Div)
V
OUT
(100mV/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A to 3A
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1.5A to 3A
Time (100μs/Div)
Time (100μs/Div)
Switching
V
OUT
(5mV/Div)
V
OUT
(5mV/Div)
Switching
V
SW
(10V/Div)
V
SW
(10V/Div)
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1.5A
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 3A
Time (500ns/Div)
Time (500ns/Div)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7297B-02
September 2012
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
