AAT2138 Datasheet, PDF (9/18 Pages) Skyworks Solutions Inc. – High Current Step-Down Converter with High-Precision Programmable Current Limited Load Switch

DATA SHEET
AAT2138
High Current Step-Down Converter
with High-Precision Programmable Current Limited Load Switch
Typical Characteristics
Step-Down Converter Load Transient
(V_SYSIN = V_REGIN = 5V,V_OUT = 3.8V, C_COUT = 22μF, L = 1μH,
C_FF = 22pF, C_REGIN = 10μF + 0.1μF)
V_OUT(AC)
200mV/div
0V
2.5A
I_LOAD
100mA
1A/div 0A
Step-Down Converter Load Transient
(V_SYSIN = V_REGIN = 5V, V_OUT = 3.4V,
C_COUT = 22μF, L = 1μH, C_FF = 22pF, C_REGIN = 10μF + 0.1μF)
V_OUT(AC)
100mV/div
0V
1A
I_LOAD
500mA/div
0A
100mA
Time 100μs/div
Time 100μs/div
Step-Down Converter Load Transient
(V_SYSIN = V_REGIN = 5V, V_OUT = 3.4V, C_COUT = 22μF, L = 1μH,
C_FF = 22pF, C_REGIN = 10μF + 0.1μF)
V_OUT(AC)
200mV/div
0V
2.5A
I_LOAD
1A/div 0A
100mA
Time 100μs/div
Step-Down Converter LineTransient
(I_OUT = 100mA, V_OUT = 3.4V, C_OUT = 22μF,
L = 1μH, C_FF = 22pF, C_REGIN = 10μF + 0.1μF)
V_REGIN
1V/div _0V
5V
4.2V
V_OUT(AC) 0V
200mV/div
Time 100μs/div
Step-Down Converter LineTransient
(I_OUT = 100mA, V_OUT = 3.8V, C_OUT = 22μF, L = 1μH, C_FF = 22pF,
C_REGIN = 10μF + 0.1μF)
5V
V_REGIN
1V/div _0V
4.2V
V_{OUT(AC) 0V}
200mV/div
Time 100μs/div
Load Switch Enable Threshold vs Input Voltage
1.2
1.1
1
0.9
0.8
V_ENH
0.7
V_ENL
0.6
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202006C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013
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