RT8272
Current Limit vs. Duty Cycle
6.2
5.8
Quiescent Current vs. Temperature
0.90
0.85
0.80
0.75
0.70
0.65
0.60
Current Limit (A)
5.4
5.0
4.6
4.2
3.8
3.4
3.0
10
20
30
40
50
60
70
80
Quiescent Current (mA)
V
IN
= 12V, V
OUT
= 3.3V
0.55
-50
-25
0
25
50
75
100
125
Duty Cycle (%)
Temperature (°C)
UVLO vs. Temperature
5.0
4.8
1.40
1.30
Enable Threshold vs. Temperature
Enable Threshold (V)
4.6
4.4
1.20
1.10
1.00
0.90
0.80
0.70
0.60
0.50
0.40
Rising
UVLO (V)
4.2
Rising
4.0
3.8
3.6
3.4
3.2
3.0
-50
-25
0
25
50
75
100
125
Falling
Falling
-50
-25
0
25
50
75
100
125
Temperature (
°
C)
Temperature (
°
C)
Load Transient Response
V
IN
= 12V, V
OUT
= 3.3V
I
OUT
= 1.5A to 3A
Load Transient Response
V
IN
= 12V, V
OUT
= 3.3V
I
OUT
= 0A to 3A
V
OUT
(50mV/Div)
V
OUT
(100mV/Div)
I
OUT
(2A/Div)
Time (100μs/Div)
I
OUT
(2A/Div)
Time (100μs/Div)
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DS8272-02 March 2011
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
