AAT1150_06 Datasheet, PDF (7/17 Pages) Advanced Analogic Technologies – 1MHz 1A Step-Down DC/DC Converter

AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
Efficiency vs. Input Voltage
(V_OUT = 1.5V)
100
I_O = 1A
90
80
I_O = 0.4A
70
60
50
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
AAT1150 Loop Gain and Phase
(C_O = 22μF; V_O = 1.5V; V_IN = 3.6V; I_O = 1A)
20
16
12
8
4
0
-4
-8
-12
-16
-20
10
200
160
Phase
120
80
40
0
Gain
4 x 22μF
5 x 22μF
-40
3 x 22μF
-80
-120
-160
-200
100
1000
Frequency (kHz)
No Load Input Current vs. Temperature
(V_CC = V_P)
12
V_CC = 5.5V V_CC = 5.0V
10
8
6
4
V_CC = 4.2V V_CC = 3.6V
V_CC = 2.7V
2
0
-20
-5
10
25
40
55
70
85
Temperature (°C)
Non-Switching I_Q vs. Temperature
(FB = 0V; V_P = V_CC)
200
190
180
170
160
150
140
130
120
110
100
-20
V_CC = 5.5V
V_CC = 5.0V
V_CC = 2.7V
V_CC = 3.6V
V_CC = 4.2V
-5
10
25
40
55
70
85
Temperature (°C)
Switching Waveform
(V_IN = 3.6V; V_OUT = 1.5V; I_OUT = 1.2A)
V_(LX)
2V/div
I_L
500mA/div
Transient Response
(V_IN = 3.6V; V_OUT = 1.5V; I_LOAD = 0.25 to 1.2A)
V_OUT
50mV/div
Inductor Current
500mA/div
Time (500ns/div)
Time (20µs/div)
1150.2006.09.1.5
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