rt8287a Richtek Technology Corporation, rt8287a Datasheet - Page 7

• Manufacturer Part Number: rt8287a
• Description: 4a, 21v 500khz Synchronous Step-down Converter
• Manufacturer: Richtek Technology Corporation

(200mV/Div)
DS8287A-01 August 2011
(50mV/Div)
(10V/Div)
V
V
(2A/Div)
(2A/Div)
OUT
OUT
V
I
OUT
LX
I
L
12
10
8
6
4
2
0
4
6
Current Limit vs. Input Voltage
Load Transient Response
Output Voltage Ripple
V
8
IN
= 12V, V
10
Time (100μs/Div)
Input Voltage (V)
Time (1μs/Div)
12
OUT
= 1.22V, I
14
V
IN
16
= 12V, I
OUT
18
= 0A to 4A
OUT
20
= 1A
22
(200mV/Div)
(50mV/Div)
(10V/Div)
V
V
(2A/Div)
(2A/Div)
OUT
OUT
V
I
OUT
LX
I
L
11
10
9
8
7
6
5
4
3
-50
-25
Current Limit vs. Temperature
Load Transient Response
V
Output Voltage Ripple
IN
0
= 12V, V
Temperature (°C)
Time (100μs/Div)
Time (1μs/Div)
25
OUT
= 1.22V, I
V
RT8287A
IN
50
V
= 12V, V
IN
www.richtek.com
= 12V, I
OUT
75
OUT
= 1A to 4A
OUT
100
= 1.22V
= 4A
125
7