AAT1138 Datasheet, PDF (10/21 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
Switch Turn On
(VIN = 5V; RL = 10Ω; CSYSOUT = 22μF)
Switch Turn Off
(VIN = 5V; RL = 10Ω; CSYSOUT = 22μF)
EN
(2V/div)
0
V_OUT
(2V/div) ₀
EN
(2V/div)
0
V_OUT
(2V/div)
0
Time (4μs/div)
Time (4μs/div)
Switch Short Circuit Response
(VIN = 5V; RLOAD = 0.3Ω)
V_IN
(2V/div)
V_OUT ⁰
(5V/div) ₀
I_OUT
(2A/div)
0
Time (1μs/div)
Switch R_SET vs. I_LIM
(VIN = 5.0V; VIN - VOUT = 0.5V)
100
10
1
100
1000
I_LIM (mA)
10000
Switch Current Limit vs. Temperature
(V_IN = 5.0V; R_SET = 11.3KΩ)
700
690
680
670
660
650
-40
-15
10
35
60
85
Temperature (°C)
Switch R_DS(ON) vs. Input Voltage
0.22
0.20
0.18
0.16
0.14
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)
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