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