AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
No Load Input Current vs. Temperature
(V
CC
= V
P
)
12
200
190
180
170
160
150
140
130
120
110
100
-20
-20
-5
10
25
40
55
70
85
-5
Non-Switching I
Q
vs. Temperature
(FB = 0V; V
P
= V
CC
)
Operating Current (µA)
V
CC
= 5.5V
Input Current (mA)
10
8
6
4
2
0
V
CC
= 5.0V
V
CC
= 5.5V
V
CC
= 5.0V
V
CC
= 4.2V
V
CC
= 3.6V
V
CC
= 2.7V
10
25
40
55
70
85
V
CC
= 4.2V
V
CC
= 3.6V
V
CC
= 2.7V
Temperature (°C)
Temperature (°C)
Switching Waveform
(V
IN
= 3.6V; V
OUT
= 1.5V; I
OUT
= 1.2A)
Transient Response
(V
IN
= 3.6V; V
OUT
= 1.5V; I
LOAD
= 0.25 to 1.2A)
V
OUT
50mV/div
V
(LX)
2V/div
I
L
500mA/div
Inductor Current
500mA/div
500nsec/div
20µs/div
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.5V; I
OUT
= 0A)
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.5V; I
OUT
= 1A)
V
OUT
5mV/div
BW = 20MHz
V
OUT
5mV/div
BW = 20MHz
LX
2V/div
LX
2V/div
500nsec/div
500nsec/div
1150.2005.03.1.2
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
