RT2858B
Current Limit vs. Temperature
6.0
7.0
6.5
5.5
Current Limit vs. Input Voltage
Peak Current
Current Limit (A)
Current Limit (A)
6.0
5.5
5.0
4.5
5.0
4.5
Valley Current
4.0
3.5
4.0
3.5
-50
-25
0
25
V
IN
= 12V, V
OUT
= 1.05V
50
75
100
125
3.0
4
6
8
10
12
V
OUT
= 1.05V
14
16
18
Temperature (°C)
Input Voltage (V)
Load Transient Response
V
OUT
(10mV/Div)
V
OUT
(50mV/Div)
V
OUT
Ripple
V
SW
(5V/Div)
I
OUT
(1A/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 0A to 3A
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
Time (100μs/Div)
Time (500ns/Div)
Power On from VIN
Power Off from VIN
V
IN
(5V/Div)
V
OUT
(1V/Div)
V
IN
(5V/Div)
V
OUT
(1V/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
I
SW
(2A/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
Time (1ms/Div)
Time (5ms/Div)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS2858B-00
September 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
