AAT2148 Datasheet, PDF (7/18 Pages) Skyworks Solutions Inc. – Low-Noise, Fast Transient 1A Step-Down Converter

DATA SHEET
AAT2148
Low-Noise, Fast Transient 1A Step-Down Converter
Typical Characteristics
N-Channel R_DS(ON) vs. Input Voltage
450
85°C
390
25°C
-40°C
330
270
210
150
2.7
3.3
3.9
4.5
5.1
Input Voltage (V)
Load Transient
(V_IN = 3.6V; V_OUT = 1.8V; C_OUT = 10μF; C_FF = 100pF)
V_OUT
(100mV/div)
1.8
I_OUT
(0.25A/div) _0A
500mA
Time (40μs/div)
Load Transient
(V_IN = 3.6V; V_OUT = 1.8V; C_OUT = 10μF; C_FF = 100pF)
Load Transient
(V_IN = 3.6V; V_OUT = 1.8V; C_OUT = 4.7μF; C_FF = 0pF)
V_{OUT 1.8}
(100mV/div)
1A
I_OUT
(0.5A/div)
0A
300mA
Time (16μs/div)
Load Transient
(V_IN = 3.6V; V_OUT = 1.8V; C_OUT = 4.7μF; C_FF = 0pF)
V_{OUT 1.8}
(200mV/div)
1A
I_OUT
(0.5A/div)
0A
300mA
Time (16μs/div)
V_{OUT 1.8}
(200mV/div)
I_OUT
(0.25A/div)
0A
500mA
Time (40μs/div)
Line Transient
(V_OUT = 1.8V; V_IN = 3.6V to 4.2V; I_OUT = 500mA; C_FF = 100pF)
V_IN
(0.5V/div) 3.6
V_OUT
(20mV/div)
1.8
Time (200μs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202009A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 28, 2012
7