RT7237A
Current Limit vs. Temperature
6
5
Load Transient Response
Current Limit (A)
V
OUT
(200mV/Div)
V
IN
= 12V
V
IN
= 17V
4
3
2
1
High Side Switch, V
OUT
= 3.3V
0
-50
-25
0
25
50
75
100
125
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 0.5A to 2A
Time (100μs/Div)
Temperature (°C)
Load Transient Response
V
OUT
(5mV/Div)
V
OUT
(200mV/Div)
V
SW
(5V/Div)
Output Ripple Voltage
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1A to 2A
I
L
(1A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 2A
Time (100μs/Div)
Time (2.5μs/Div)
Power On from VIN
Power Off from VIN
V
IN
(5V/Div)
V
OUT
(2V/Div)
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 2A
V
IN
(5V/Div)
V
OUT
(2V/Div)
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 2A
Time (10ms/Div)
Time (10ms/Div)
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS7237A-01
September 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
