AAT1138 Datasheet, PDF (9/21 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 Start-Up Sequence
(VSYSOUT = 3.6V; VOUT = 1.8V; ILOAD = 2A,
CSYSOUT = COUT = 22μF, L = 2.2μH)
EN
(2V/div) ₀
V_OUT 0
(2V/div)
I_{SYSOUT 0}
(500mA/div)
Step-Down Converter Start-Up Sequence
(VSYSOUT = 5.0V; VOUT = 3.3V; ILOAD = 2A,
CSYSOUT = COUT = 22μF, L = 2.2μH)
EN
(2V/div)
0
V_{OUT 0}
(2V/div)
I_SYSOUT
(500mA/div) 0
Time (400μs/div)
Time (400μs/div)
Quiescent Current vs. Input Voltage
4000
3200
2400
VOUT = 1.8V
VOUT = 3.3V
VOUT = 3.8V
1600
800
0
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)
Quiescent Current vs. Temperature
(VIN = 5.0V)
500
470
440
410
380
350
320
-40
VOUT = 1.8V
VOUT = 3.3V
VOUT = 3.8V
-15
10
35
60
85
Temperature (°C)
Shutdown Current vs. Temperature
0.10
0.08
0.06
0.04
0.02
0.00
-40
-15
10
35
60
85
Temperature (°C)
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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