AAT2556 Datasheet, PDF (8/27 Pages) Advanced Analogic Technologies – Battery Charger and Step-Down Converter for Portable Applications

DATA SHEET
AAT2556
Battery Charger and Step-Down Converter for Portable Applications
Typical Characteristics – Step-Down Converter
Load Transient Response
(10mA to 250mA; V_IN = 3.6V; V_OUT = 1.8V;
C_OUT = 4.7µF; C_FF = 100pF)
2.0
1.9
V_O
1.8
1.7
I_O
1.6
1.5
I_LX
1.4
1.3
1.2
Time (25µs/div)
Load Transient Response
(10mA to 250mA; V_IN = 3.6V; V_OUT = 1.8V; C_OUT = 4.7µF)
2.0
1.4
1.9
V_O
1.2
1.8
1.0
1.7
0.8
1.6
I_O
0.6
1.5
0.4
1.4
I_LX
0.2
1.3
0.0
1.2
-0.2
Time (25µs/div)
Line Response
(V_OUT = 1.8V @ 250mA; C_FF = 100pF)
1.90
7.0
1.85
V_O
6.5
1.80
6.0
1.75
5.5
1.70
5.0
1.65
4.5
1.60 VIN
4.0
1.55
3.5
1.50
3.0
Time (25µs/div)
Output Ripple
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1mA)
40
20 _VO
0
-20
-40
-60
-80 _IL
-100
-120
Time (2µs/div)
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
-0.01
Output Ripple
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 250mA)
40
0.8
20 _VO
0.7
0
0.6
-20
0.5
-40
0.4
-60
0.3
-80
I_L
0.2
-100
0.1
-120
0.0
Time (200ns/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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202177B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 19, 2013