AAT1138 Datasheet, PDF (7/21 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 P-Channel R_DS(ON)
vs. Input Voltage
200
T = -40°C
180
T = 25°C
T = 85°C
160
140
120
100
80
2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
Step-Down Converter N-Channel R_DS(ON)
vs. Input Voltage
150
T = -40°C
T = 25°C
130
T = 85°C
110
90
70
50
2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
Step-Down Converter Output Ripple
(VSYSOUT = 5.0V, VOUT = 1.8V, ILOAD = 2A;
CSYSOUT = COUT = 22μF, L = 2.2μH)
V_SW
(2V/div)
0
V_OUT
(20mV/div)
0
I_INDUCTOR
(1A/div)
0
Time (800ns/div)
Step-Down Converter Output Ripple
(VSYSOUT = 3.6V, VOUT = 1.8V, ILOAD = 10mA;
CSYSOUT = COUT = 22μF, L = 2.2μH)
V_SW
(2V/div)
0
V_OUT
(10mV/div)
0
I_INDUCTOR
(100mA/div)
0
Time (2μs/div)
Step-Down Converter Output Ripple
(VSYSOUT = 5.0V, VOUT = 3.3V, ILOAD = 2A;
CSYSOUT = COUT = 22μF, L = 2.2μH)
V_SW
(2V/div)
0
V_OUT
(20mV/div)
0
I_INDUCTOR
(1A/div)
0
Time (800ns/div)
Step-Down Converter Output Ripple
(VSYSOUT = 5.0V, VOUT = 3.3V, ILOAD = 10mA;
CSYSOUT = COUT = 22μF, L = 2.2μH)
V_SW
(2V/div)
0
V_OUT
(10mV/div)
0
I_INDUCTOR
(100mA/div) ₀
Time (2μs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201978B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 15, 2013
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