AAT3601_08 Datasheet, PDF (12/37 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

PRODUCT DATASHEET
AAT3601178
Total Power Solution for Portable Applications
Typical Characteristics – Step-Down Buck Converter
Step-Down Buck Efficiency vs. Output Current
(V_OUT = 1.24V; L = 2.2µH)
100
90
80
70
60
50
40
30
20
10
0
1
VCHGIN = 4.5V
VCHGIN = 5V
VCHGIN = 5.5V
VCHGIN = 6V
VBAT = 4.2V
VBAT = 3.6V
VBAT = 3V
10
100
1000
Output Current (mA)
Step-Down Buck Load Regulation
vs. Output Current
(V_OUT = 1.24V; L = 2.2µH)
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
1
VCHGIN = 4.5V
VCHGIN = 5V
VCHGIN = 5.5V
VCHGIN = 6V
VBAT = 4.2V
VBAT = 3.6V
VBAT = 3V
10
100
1000
Output Current (mA)
Step-Down Buck Line Regulation
vs. CHGIN and Battery Input Voltage
(V_OUT = 1.24V; L = 2.2µH)
0.5
0.4
0.3
0.2
0.1
0
-0.1
IOUT = 1mA
-0.2
-0.3
IOUT = 10mA
IOUT = 50mA
IOUT = 100mA
-0.4
-0.5
IOUT = 200mA
IOUT = 300mA
2.5
3
3.5
V_BAT
4 4.2
V_CHGIN
4.5
5
5.5
6
Input V_BAT, V_CHGIN (V)
V_BAT Line Transient Response Step-Down Buck
(V_BAT = 3.5V to 4.2V; I_OUT = 300mA; V_OUT = 1.24V; C_OUT = 4.7µF)
1.32
1.28
1.24
1.20
1.16
4.5
4.0
3.5
3.0
Time (100µs/div)
Step-Down Buck Output Voltage vs. Temperature
(I_OUT = 10mA)
1.248
1.246
1.244
1.242
1.240
VCHGIN = 6.0V
VCHGIN = 5.5V
VCHGIN = 5V
VCHGIN = 4.5V
VBAT = 4.2V
VBAT = 3.6V
VBAT = 3V
1.238
1.236
1.234
1.232
-50
-25
0
25
50
Temperature (°C)
75
100
Load Transient Response Step-Down Buck
(10mA to 150mA; V_BAT = 3.6V; V_OUT = 1.24V; C_OUT = 4.7µF)
1.30
350
1.25
300
1.20
250
200
150
100
50
0
Time (100µs/div)
12
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3601.2008.07.1.1