PRODUCT DATASHEET
AAT2504178
SystemPowerTM
Adjustable 3-Channel Regulator
Typical Characteristics–Step-Down Converter
Step-Down Converter Line Transient
(VOUT = 1.8V; IOUT = 800mA; VIN = 3.6V-4.2V)
No Load Quiescent Current vs. Input Voltage
(Step-Down Converter Enabled; Both LDOs Enabled)
5.0
4.5
4.0
3.5
160
140
120
85°C
100
80
0.02
0.00
-0.02
25°C
60
40
-40°C
20
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Time (20µs/div)
Input Voltage (V)
No Load Quiescent Current vs. Input Voltage
(Step-Down Converter Enabled; Both LDOs Disabled)
Step-Down Converter Switching Frequency
vs. Temperature
(VIN = 3.6V; VOUT = 1.2V)
110
100
90
2.05
600mA
2.00
1.95
1.90
1.85
1.80
1.75
80
85°C
800mA
400mA
70
60
25°C
50
40
-40°C
30
20
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-40
-15
10
35
60
85
Input Voltage (V)
Temperature (ºC)
Step-Down Converter Soft Start
(VIN = 3.6V; VOUT = 1.8V; IOUT = 800mA)
Step-Down Converter Turn-Off
(VIN = 3.6V; VOUT = 1.8V; IOUT = 800mA)
6
4
2
0
6
4
2
0
EN
EN
1.8V
VOUT
0V
VOUT
IL
1.8V
1.5
1.0
0.5
0.0
1.0
0.5
0.0
0V
IL
Time (50µs/div)
Time (100µs/div)
w w w . a n a l o g i c t e c h . c o m
6
2504.2008.02.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
