AAT1155 Datasheet, PDF (7/17 Pages) Advanced Analogic Technologies – 1MHz 2.5A Step-Down DC/DC Converter

AAT1155
1MHz 2.5A Step-Down DC/DC Converter
Typical Characteristics
Tantalum Output Ripple
(I_OUT = 3.0A; V_OUT = 3.3V; V_IN = 5.0V)
0.04
7
0.02
6
0.00
5
-0.02
4
-0.04
3
-0.06
2
-0.08
1
-0.10 ^{120µF 6.3V Tantalum}
0
Vishay P/N 594D127X96R3C2T
-0.12
-1
0
1
2
3
4
5
Time (µs)
Loop Crossover Gain and Phase
16
12
8
4
0
-4
-8
100µF 6.3 Ceramic
300µF gain
-12 ^{TDK P/N C3225X5R0J107M}
Vishay GRM43SR60J107ME20L
-16
10000
Frequency (Hz)
180
L = 1.5µHy
135
90
Phase
45
0
200µF gain _-45
-90
-135
-180
100000
Output Ripple
(I_OUT = 3.0A; V_OUT = 3.3V; V_IN = 5.0V)
4
7
2
6
0
5
-2
4
-4
3
-6
2
-8 _{200µF 6.3V Ceramic}
1
-10 ^{TDK P/N C3325X5R0J107M}
0
Vishay GRM43SR60J107ME20L
-12
-1
0
1
2
3
4
5
Time (µs)
Output Ripple
(I_OUT = 3.0A; V_OUT = 3.3V; V_IN = 5.0V)
4
7
2
6
0
5
-2
4
-4
3
-6
2
-8
1
300µF 6.3VCeramic
-10 TDK P/N C3325X5R0J107M
0
Vishay GRM43SR60J107ME20L
-12
-1
0
1
2
3
4
5
Time (µs)
Loop Crossover Gain and Phase
16
12
8
4
Gain
0
-4
-8
-12 ^{120µF 6.3V Tantalum}
Vishay P/N 594D127X96R3C2T
-16
10000
100000
Frequency (Hz)
180
135
90
45
0
-45
-90
-135
-180
1000000
Tantalum Transient Response
(I_OUT = 0 to 3.0A; V_OUT = 3.3V; V_IN = 5.0V)
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
0
120µF 6.3V Tantalum
Vishay P/N 594D127X96R3C2T
100
200
300
400
Time (µs)
7
6
5
4
3
2
1
0
-1
500
1155.2005.11.1.6
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