RT9018A/B
Dropout Voltage vs. Load Current
Start Up from Enable
400
350
300
250
200
150
100
50
IOUT = 3A
125°C
25°C
EN
(1V/Div)
VOUT
(1V/Div)
PGOOD
(1V/Div)
-40°C
IIN
(2A/Div)
0
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
3
Time (500μs/Div)
Load Current (A)
Start Up from VDD
Start Up from VIN
IOUT = 3A
IOUT = 3A
VDD
(5V/Div)
VIN
(1V/Div)
VOUT
(1V/Div)
VOUT
(1V/Div)
PGOOD
(1V/Div)
PGOOD
(1V/Div)
IIN
(2A/Div)
IIN
(2A/Div)
Time (500μs/Div)
Time (1ms/Div)
Short Circuit Current vs. Temperature
Short Circuit Protection
2.6
VDD = 5V, VIN = 1.8V, VOUT = 1.2V
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
IOUT
(1A/Div)
-40
-20
0
20
40
60
80
100
Time (100μs/Div)
Temperature
(°C)
www.richtek.com
6
DS9018A/B-04 September 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
