PRODUCT DATASHEET
AAT1130
SwitchReg
TM
Typical Characteristics
Supply Current vs. Supply Voltage
(Switching)
Switching Frequency (MHz)
100
4
3.75
3.5
3.25
3
2.75
2.5
2.25
2
2.7
2.5MHz 500mA Step-Down DC/DC Converter
Switching Frequency vs. Input Voltage
(V
OUT
= 1V; C
IN
= C
OUT
= 2.2µF; L = 1µH)
Supply Current (µA)
95
90
85
80
75
70
65
60
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Supply Voltage (V))
Input Voltage (V)
On-Time vs. Input Voltage
(V
OUT
= 1V; C
IN
= C
OUT
= 2.2µF; L = 1µH))
Switching Frequency (MHz)
250
3
2.75
2.5
2.25
2
1.75
1.5
1.25
Switching Frequency vs. Input Voltage
(V
OUT
= 1.8V; C
IN
= C
OUT
= 2.2µF; L = 1.5µH))
200
On-Time (ns)
150
100
50
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
1
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
On-Time vs. Input Voltage
Switching Frequency Variation (%)
(V
OUT
= 1.8V; C
IN
= C
OUT
= 2.2µF; L = 1.5µH))
400
350
20
15
10
5
0
-5
-10
-15
-20
200
Switching Frequency Variation
vs. Load Current
V
IN
= 2.7V
V
IN
= 3.3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5V
V
IN
= 5.5V
On-Time (ns)
300
250
200
150
100
50
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
250
300
350
400
450
500
550
600
Input Voltage (V)
Load Current (mA)
6
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1130.2008.08.1.1
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