RT4805A
Output Ripple vs. Load Current
Output Ripple vs. Load Current
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
= 3.4V, I
= 0A to 2A
V
= 3.2V, I
= 0A to 2A
OUT
LOAD
OUT
LOAD
V
V
V
V
= 2.5V
= 2.7V
= 3V
IN
IN
IN
IN
V
V
V
V
= 2.5V
IN
IN
IN
IN
= 2.7V
= 3V
= 3.3V
= 3.1V
0
500
1000
1500
2000
0
500
1000
1500
2000
Load Current (mA)
Load Current (mA)
Maximum Load Current vs. Input Voltage
Startup
5.0
4.0
3.0
2.0
1.0
0.0
V
OUT
(2V/Div)
I
LX
(1A/Div)
EN
(5V/Div)
PGOOD
(5V/Div)
V
= 2.5V to 3.7V, V
= 3.4V
OUT
IN
V
= 3V, V
= 3.4V, Load = 50
OUT
IN
2.5
2.7
2.9
3.1
3.3
3.5
3.7
Time (100s/Div)
Input Voltage (V)
Startup
Overload Protection
V
= 3V, V
= 3.2V, Load = 50
OUT
IN
V
= 3V, V
= 3.4V
IN
OUT
V
OUT
(2V/Div)
V
OUT
(2V/Div)
I
LX
(1A/Div)
I
LX
EN
(2A/Div)
(5V/Div)
PGOOD
(5V/Div)
PGOOD
(5V/Div)
Time (100s/Div)
Time (1ms/Div)
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS4805A-02 April 2017
www.richtek.com
11
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
