RT8004
Typical Operating Characteristics
Efficiency vs. Output Current
100%
100
0.30%
0.30
Load Regulation
V
IN
= 3.3V, V
OUT
= 2.5V
90
90%
80
80%
V
IN
= 5V
Efficiency (%)
70%
70
60%
60
V
OUT
Devation (%)
1000
1500
2000
2500
3000
V
IN
= 3.3V
0.20%
0.20
0.10%
0.10
50
50%
40
40%
30
30%
20%
20
0.00%
0
-0.10%
-0.10
10
10%
0
0%
0
V
OUT
= 2.5V, 1M Continuous Mode Operation
500
-0.20%
-0.20
50
550
1050
1550
2050
2550
3050
Output Current (mA)
Output Current (mA)
Soft-Star Power On
V
IN
= 3.3V, V
OUT
= 2.5V
R
LOAD
= 0.83Ω
Power Off
V
IN
= 3.3V, V
OUT
= 2.5V, I
OUT
= 0A
V
OUT
(1V/Div)
V
SS
(1V/Div)
I
L
(1A/Div)
Time (2.5ms/Div)
I
L
(2A/Div)
V
OUT
(2V/Div)
V
LX
(5V/Div)
V
IN
(2V/Div)
Time (25ms/Div)
Ripple Voltage
V
IN
= 3.3V, V
OUT
= 2.5V, I
OUT
= 3A
Load Transien Response
V
IN
= 3.3V, V
OUT
= 2.5V
I
LOAD
= No Load to 3A
V
OUT
(10mV/Div)
V
LX
(2V/Div)
V
OUT
(50mV/Div)
I
L
(2A/Div)
Time (500ns/Div)
I
L
(1A/Div)
Time (25μs/Div)
www.richtek.com
8
DS8004-03
September 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
