AAT1138 Datasheet, PDF (8/21 Pages) Skyworks Solutions Inc. – 2A Step-Down Converter with Adjustable Input Current Limit

DATA SHEET
AAT1138
2A Step-Down Converter with Adjustable Input Current Limit
Typical Characteristics
Step-Down Converter Output Ripple
(VSYSOUT = 5.0V, VOUT = 3.8V, ILOAD = 2A;
CSYSOUT = COUT = 22μF, L = 2.2μH)
Step-Down Converter Output Ripple
(VSYSOUT = 5.0V, VOUT = 3.8V, ILOAD = 10mA;
CSYSOUT = COUT = 22μF, L = 2.2μH)
V_SW
(2V/div)
0
V_OUT
(20mV/div)
0
I_INDUCTOR
(1A/div)
0
Time (800ns/div)
V_SW
(2V/div)
0
V_OUT
(10mV/div)
0
I_INDUCTOR
(100mA/div)
0
Time (2μs/div)
Step-Down Converter Load Transient
(10mA to 2A; VSYSOUT = 3.6V, VOUT = 1.8V;
COUT = 22μF, CFF = 100pF, L = 2.2μH)
V_OUT 0
(200mV/div)
I_{LOAD 10mA}
(1A/div)
Time (40μs/div)
Step-Down Converter Load Transient
(10mA to 2A; VSYSOUT = 5.0V, VOUT = 3.3V;
COUT = 22μF, CFF = 100pF, L = 2.2μH)
V_{OUT 0}
(200mV/div)
I_LOAD
(1A/div) 10mA
Time (40μs/div)
Step-Down Converter Line Transient
(VSYSOUT = 3.6V to 4.2V; VOUT = 1.8V; ILOAD = 2A;
COUT = 22μF, CFF = 100pF, L = 2.2μH)
V_SYSOUT
(2V/div)
0
V_{OUT 0}
(50mV/div)
Time (100μs/div)
Step-Down Converter Line Transient
(VSYSOUT = 4.5V to 5.0V; VOUT = 3.3V; ILOAD = 2A;
COUT = 22μF, CFF = 100pF, L = 2.2μH)
V_SYSOUT
(2V/div)
0
V_{OUT 0}
(50mV/div)
Time (100μs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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201978B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 15, 2013