AAT2749 Datasheet, PDF (5/17 Pages) Skyworks Solutions Inc. – 3.0MHz Step-Down Converter and Low-V in LDO

Typical Characteristics
No Load Quiescent Current vs. Input Voltage
(EN_BUCK = EN_LDO = VIN; LL Mode)
150
130
110
90
70
50
30
2.3
2.8
3.3
3.8
4.3
Input Voltage (V)
T = 85°C
T = 25°C
T = -40°C
4.8
5.3
DATA SHEET
AAT2749
3.0MHz Step-Down Converter and Low-V_IN LDO
No Load Quiescent Current vs. Input Voltage
(EN_BUCK = EN_LDO = VIN; PWM Mode)
14
12
10
8
6
4
2
0
2.3
2.8
3.3
3.8
4.3
Input Voltage (V)
T = 85°C
T = 25°C
T = -40°C
4.8
5.3
LDO Turn-On Response Time
(V_OUT = 1.2V; V_IN = 5V; I_OUT = 400mA)
6
3.5
4
3
2
2.5
0
2
-2
1.5
-4
1
-6
0.5
-8
0
-10
-0.5
Time (50μs/div)
LDO Turn-Off Response Time
(V_OUT = 1.2V; V_IN = 5V; I_OUT = 400mA)
6
3.5
4
3
2
2.5
0
2
-2
1.5
-4
1
-6
0.5
-8
0
-10
-0.5
Time (10μs/div)
LDO Line Transient Response
(V_OUT = 1.2V; V_IN = 4V to 5V; I_OUT = 400mA)
6
1.8
5
1.7
4
1.6
3
1.5
2
1.4
1
1.3
0
1.2
-1
1.1
-2
1
Time (50μs/div)
LDO Line Transient Response
(V_OUT = 1.2V; V_IN = 4V to 5V; I_OUT = 400mA)
6
1.8
5
1.7
4
1.6
3
1.5
2
1.4
1
1.3
0
1.2
-1
1.1
-2
1
Time (50μs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202037A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
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