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AAT2138 Datasheet, PDF (8/18 Pages) Skyworks Solutions Inc. – High Current Step-Down Converter with High-Precision Programmable Current Limited Load Switch
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DATA SHEET
AAT2138
High Current Step-Down Converter
with High-Precision Programmable Current Limited Load Switch
Typical Characteristics
Soft Start
(VSYSIN = VREGIN = 5V, COUT = 22μF, L=1μH, VOUT = 3.4V,
IOUT = 2.5A)
VENREGIN
2V/div 0V
Soft Start
(VSYSIN = VREGIN = 5V, COUT = 22μF,VOUT = 3.4V,
L = 1μH, IOUT = 0A)
VENREGIN
2V/div
0V
VOUT
2V/div
0V
IREGIN
1A/div
0A
Time 1ms/div
VOUT
2V/div
0V
IREGIN 0A
50mA/div
Time 1ms/div
Output Ripple
(VSYSIN = VREGIN = 5V, PFM Mode, L=1μH, COUT = 22μF,
CREGIN = 10μF + 0.1μF,VOUT = 3.4V,IOUT = 10mA)
VSW
2V/div
0V
VOUT(AC)
10mV/div 0V
IIN
0A
200mA/div
Time 400ns/div
Output Ripple
(VSYSIN = VREGIN = 5V, PWM Mode, L = 1μH, COUT = 22μF,
CREGIN = 10μF + 0.1μF, VOUT= 3.4V, IOUT = 10mA)
VSW
2V/div
0V
VOUT(AC) 0V
10mV/div
IIN
0A
200mA/div
Time 400ns/div
Output Ripple
(VSYSIN = VREGIN = 5V, PWM Mode, L = 1μH, COUT = 22μF,
CREGIN = 10μF + 0.1μF, VOUT = 3.4V, IOUT = 2A)
VSW
2V/div
0V
VOUT(AC) 0V
10mV/div
IIN
1A/div
0A
Time 400ns/div
Step-Down Converter Load Transient
(VSYSIN = VREGIN = 5V, VOUT = 3.8V ,
CCOUT = 22μF, L = 1μH, CFF = 22pF, CREGIN = 10μF + 0.1μF)
VOUT(AC)
100mV/div
0V
1A
ILOAD
500mA/div
0A
100mA
Time 100μs/div
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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202006C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013
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