AAT2749 Datasheet, PDF (8/17 Pages) Skyworks Solutions Inc. – 3.0MHz Step-Down Converter and Low-V in LDO

Typical Characteristics
Step-Down Converter Load Transient Response
(V_OUT = 1.8V; V_IN = 5V; I_OUT = 1mA to 600mA; C_FF = 0pF)
2
3.5
1.9
3
1.8
2.5
1.7
2
1.6
1.5
1.5
1
1.4
0.5
1.3
0
1.2
-0.5
Time (100μs/div)
DATA SHEET
AAT2749
3.0MHz Step-Down Converter and Low-V_IN LDO
Step-Down Converter Line Regulation
(VOUT = 1.8V; L = 2.2μH)
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
2.3 2.7 3.1
IOUT = 600mA
IOUT = 300mA
IOUT = 100mA
IOUT = 10mA
IOUT = 0.1mA
3.5 3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
LDO Power Supply Rejection Ratio, PSRR
(IOUT2 = 1.8V; BW = 100Hz to 300Hz)
100
90
80
70
60
50
40
30
20
10
0
10²
10³
10⁴
10⁵
Frequency (Hz)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
8
202037A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012