rt9018a Richtek Technology Corporation, rt9018a Datasheet - Page 6

• Manufacturer Part Number: rt9018a
• Description: Maximum Ultra Dropout Regulator
• Manufacturer: Richtek Technology Corporation

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