850kHz 1A Synchronous Buck DC/DC Converter
Typical Characteristics
No Load Input Current vs. Temperature
V
CC
= V
P
12
AAT1152
Non-Switching I
Q
vs. Temperature
FB = 0V, V
P
= V
CC
Operating Current (µA)
200
190
180
170
160
150
140
130
120
110
100
-20
-5
V
CC
= 5.5V
V
CC
= 5.0V
Input Current (mA)
10
8
6
4
2
0
-20
-5
10
25
40
55
70
85
V
CC
= 5.5V
V
CC
= 5.0V
V
CC
= 4.2V
V
CC
= 2.7V
10
25
V
CC
= 4.2V
V
CC
= 3.6V
V
CC
= 2.7V
V
CC
= 3.6V
40
55
70
85
Temperature (°C)
Temperature (°C)
Switching Waveform
V
OUT
50mV/div
V
(LX)
2V/div
Inductor Current
500mA/div
Transient Response
I
L
500mA/div
V
IN
=3.6V
V
OUT
=1.5V
I
OUT
=1.2A
V
IN
=3.6V
V
OUT
=1.5V
I
LOAD
=0.25 to 1.2A
500nsec/div
20µs/div
Output Ripple
1.5V, No Load
V
OUT
5mV/div
BW=20MHz
V
IN
=3.6V
V
OUT
=1.5V
I
OUT
=0A
LX
2V/div
500nsec/div
V
OUT
5mV/div
BW=20MHz
V
IN
=3.6V
V
OUT
=1.5V
I
OUT
=1A
LX
2V/div
Output Ripple
1.5V, 1A Load
500nsec/div
1152.2003.01.0.9
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
