AAT2789 Datasheet, PDF (7/22 Pages) Advanced Analogic Technologies – Low Noise, High Frequency Dual Step-Down Converter

SystemPower^TM
PRODUCT DATASHEET
AAT2789
Low Noise, High Frequency Dual Step-Down Converter
Typical Characteristics – Channel 1
Line Transient Response
(V_OUT = 1.8V; I_OUT = 1.5A; C_FF = 100pF)
5.0
0.12
4.5
0.10
4.0
0.08
3.5
0.06
3.0
0.04
2.5
0.02
2.0
0.00
1.5
-0.02
1.0
-0.04
Time (100µs/div)
Line Regulation
(V_OUT = 1.8V; I_OUT = 1A)
0.40
0.30
0.20
0.10
0.00
-0.10
-0.20
-0.30
-0.40
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Input Voltage (V)
Light Load Switching Waveform
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1mA; C_FF = 0pF)
80
0.7
40
0.6
0
0.5
-40
0.4
-80
0.3
-120
0.2
-160
0.1
-200
0.0
-240
-0.1
Time (5µs/div)
Light Load Switching Waveform
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1mA; C_FF = 0pF)
80
0.7
40
0.6
0
0.5
-40
0.4
-80
0.3
-120
0.2
-160
0.1
-200
0.0
-240
-0.1
Time (200µs/div)
Light Load Switching Waveform
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1mA; C_FF = 100pF)
80
0.7
40
0.6
0
0.5
-40
0.4
-80
0.3
-120
0.2
-160
0.1
-200
0.0
-240
-0.1
Time (5µs/div)
Light Load Switching Waveform
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1mA; C_FF = 100pF)
80
0.7
40
0.6
0
0.5
-40
0.4
-80
0.3
-120
0.2
-160
0.1
-200
0.0
-240
-0.1
Time (500µs/div)
2789.2008.03.1.0
www.analogictech.com
7