AAT2500B Datasheet, PDF (7/21 Pages) Advanced Analogic Technologies – Adjustable 3-Channel Regulator

SystemPower^TM
PRODUCT DATASHEET
AAT2500B
Adjustable 3-Channel Regulator
Typical Characteristics–Step-Down Converter (continued)
Step-Down Converter Line Transient
(V_OUT = 1.8V; I_OUT = 800mA; V_IN = 3.6V-4.2V)
5.0
4.5
4.0
3.5
0.02
0.00
-0.02
Time (20µs/div)
No Load Quiescent Current vs. Input Voltage
(Step-Down Converter Enabled; Both LDOs Enabled)
160
140
120 _85°C
100
80 25°C
60
40 -40°C
20
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
No Load Quiescent Current vs. Input Voltage
(Step-Down Converter Enabled; Both LDOs Disabled)
110
100
90
80 _85°C
70
60 _25°C
50
40
30 ^-40°C
20
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Step-Down Converter Switching Frequency
vs. Temperature
(V_IN = 3.6V; V_OUT = 1.2V)
2.05
2.00
600mA
1.95
400mA
800mA
1.90
1.85
1.80
1.75
-40
-15
10
35
60
85
Temperature (ºC)
Step-Down Converter Soft Start
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 800mA)
6
4
EN
2
1.8V
0
V_OUT 0V
1.5
1.0
0.5
I_L
0.0
Time (50µs/div)
Step-Down Converter Turn-Off
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 800mA)
6
4
EN
2
0
V_OUT 1.8V
I_L
1.0
0V
0.5
0.0
Time (100µs/div)
2500B.2008.03.1.0
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