AAT1151
850kHz 700mA Synchronous Buck DC/DC Converter
Typical Characteristics
Output Ripple 1.8V, 50mA, V
IN
= 3.6V
Circuit of Figure 1
20
1.4
1.2
Line Transient Response 1.8V, 50mA
Circuit of Figure 1
4.4
4.2
120
100
Output Voltage
(AC coupled) (top) (mV)
10
0
-10
-20
-30
-40
-50
-60
Inductor Current
(bottom) (A)
Output Voltage
(bottom) (mV)
0.8
0.6
0.4
0.2
0
-0.2
Input Voltage
(top) (V)
1
4
3.8
3.6
3.4
3.2
3
2.8
80
60
40
20
0
-20
-40
Time (2µs/div)
µ
Time (20µs/div)
µ
Output Ripple 1.8V, 0.7A, V
IN
= 3.6V
Circuit of Figure 1
20
3.5
3
Line Transient Response 1.8V, 0.7A
Circuit of Figure 1
4.4
4.2
120
100
Output Voltage
(AC coupled) (top) (mV)
10
0
-10
-20
-30
-40
-50
-60
Inductor Current
(bottom) (A)
Output Voltage
(bottom) (mV)
2
1.5
1
0.5
0
-0.5
Input Voltage
(top) (V)
2.5
4
3.8
3.6
3.4
3.2
3
2.8
80
60
40
20
0
-20
-40
Time (2µs/div)
µ
Time (20µs/div)
µ
Load Transient Response 50mA to 0.7A
V
IN
= 3.6V
−
Circuit of Figure 1
Output Voltage (top) (mV)
(AC coupled)
40
20
0
-20
-40
-60
-80
-100
-120
3.5
4
3
3
2
1
0
-1
-2
-3
-4
Soft Start 1.8V, 0.7A, V
IN
= 3.6V
Circuit of Figure 1
3.5
3
Enable (top)
Output (middle) (V)
Inductor Current
(bottom) (A)
Inductor Current
(bottom) (A)
2.5
2
1.5
1
0.5
0
-0.5
2.5
2
1.5
1
0.5
0
-0.5
Time (200µs/div)
Time (200µs/div)
µ
6
1151.2005.11.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
