RT7270
Current Limit vs. Temperature
7.0
6.5
4.4
4.3
4.2
Input UVLO vs. Temperature
Current Limit (A)
6.0
Input UVLO (V)
4.1
4.0
3.9
3.8
3.7
3.6
5.5
5.0
4.5
4.0
3.5
Rising
Falling
V
IN
= 12V, V
OUT
= 3.3V
3.0
-50
-25
0
25
50
75
100
125
3.5
3.4
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
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
(10mV/Div)
V
OUT
(10mV/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 (2.5μs/Div)
Time (2.5μs/Div)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7270-01
September 2012
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
