AAT2158_08 Datasheet, PDF (7/16 Pages) Advanced Analogic Technologies – 1.5A Low Noise Step-Down Converter

SwitchReg^TM
Typical Characteristics
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)
Enable Soft Start
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1.5A)
EN
(2V/div)
V_OUT
(1V/div)
I_IN
(500mA/div)
Time (100µs/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 (5µs/div)
PRODUCT DATASHEET
AAT2158
1.5A Low Noise Step-Down Converter
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)
Heavy Load Switching Waveform
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1.5A)
4.0
2.6
2.0
2.4
0.0
2.2
-2.0
2.0
-4.0
1.8
-6.0
1.6
-8.0
1.4
-10.0
1.2
-12.0
1.0
Time (500ns/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)
2158.2008.02.1.2
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