PRODUCT DATASHEET
AAT2550178
SystemPowerTM
Total Power Solution for Portable Applications
Typical Characteristics — Step-Down Converter (continued)
P-Channel RDS(ON) vs. Input Voltage
N-Channel RDS(ON) vs. Input Voltage
750
700
650
600
550
500
450
400
350
300
750
700
650
600
550
500
450
400
350
300
120°C
120°C
100°C
100°C
85°C
85°C
25°C
25°C
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Input Voltage (V)
Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 1.8V;
COUT = 10µF; CFF = 100pF)
Load Transient Response
(300mA to 400mA; VIN = 3.6V;
VOUT = 1.8V; COUT = 4.7µF)
2.0
1.9
1.8
1.7
1.90
VO
1.85
1.80
1.75
VO
IO
IO
300mA
400mA
300mA
1mA
IL
0.4
0.3
0.2
0.1
IL
0
Time (50µs/div)
Time (50µs/div)
Load Transient Response
(300mA to 400mA; VIN = 3.6V;
VOUT = 1.8V; COUT = 10µF)
Load Transient Response
(300mA to 400mA; VIN = 3.6V; VOUT = 1.8V;
COUT = 10µF; CFF = 100pF)
1.850
1.90
1.85
1.80
1.75
1.825
1.800
1.775
VO
IO
VO
IO
400mA
400mA
300mA
300mA
0.4
0.3
0.2
0.1
0.4
0.3
0.2
0.1
IL
IL
Time (50µs/div)
Time (50µs/div)
w w w . a n a l o g i c t e c h . c o m
8
2550.2008.02.1.3
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
