RT8282B RICHTEK [Richtek Technology Corporation], RT8282B Datasheet - Page 7

• Manufacturer Part Number: RT8282B
• Description: 2A, 23V, 1.2MHz Synchronous Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

DS8282B-01 March 2011
(50mV/Div)
V
(2A/Div)
OUT
I
OUT
6.0
5.5
5.0
4.5
4.0
3.5
3.0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
4
Output Current Limit vs. Input Voltage
6
10
Current Limit vs. Duty Cycle
Load Transient Response
8
20
V
V
V
V
OUT
OUT
OUT
IN
10
= 12V, V
Input Voltage (V)
Time (100μs/Div)
Duty Cycle (%)
= 1.2V
= 3.3V (Add Bootstrap Diode)
= 3.3V
30
12
V
IN
OUT
= 4.5V to 23V, V
40
14
= 3.3V, I
16
50
18
OUT
60
= 1A to 2A
OUT
20
70
= 3.3V
22
80
24
(50mV/Div)
(10mV/Div)
(10V/Div)
V
(2A/Div)
V
(1A/Div)
OUT
OUT
V
I
OUT
SW
I
L
6.0
5.5
5.0
4.5
4.0
3.5
3.0
-50
Current Limit VS. Temperature
-25
Load Transient Response
V
0
IN
= 12V, V
Time (100μs/Div)
Time (500ns/Div)
Temprature (°C)
V
IN
Switching
25
= 12V, V
OUT
V
RT8282B
= 3.3V, I
50
IN
OUT
= 12V, V
= 3.3V, I
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75
OUT
OUT
= 0A to 2A
OUT
100
= 3.3V
= 2A
125
7