RT7297C
Current Limit vs. Temperature
6.0
7
6
Current Limit vs. Input Voltage
5.6
Current Limit (A)
Current Limit (A)
5
4
3
2
1
5.2
V
OUT
= 1.2V
V
OUT
= 5V
4.8
4.4
V
IN
= 12V, V
OUT
= 3.3V
4.0
-50
-25
0
25
50
75
100
125
0
4
6
8
10
12
14
16
18
Temperature (°C)
Input Voltage (V)
Load Transient Response
Load Transient Response
V
OUT
(100mV/Div)
V
OUT
(100mV/Div)
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0A to 2.5A
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1A to 3A
Time (100μs/Div)
Time (100μs/Div)
Output Ripple Voltage
Output Ripple Voltage
V
SW
(10V/Div)
V
OUT
(10mV/Div)
V
SW
(10V/Div)
V
OUT
(10mV/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 (1μs/Div)
Time (1μs/Div)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS7297C-01
September 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
