PRODUCT DATASHEET
AAT1184
TM
SwitchReg
High Voltage Step-Down Regulator
Typical Characteristics
Step-Down Converter Efficiency vs. Load
Step-Down Converter Efficiency vs. Load
(VOUT = 3.3V; L = 4.7µH)
(VOUT = 5V; L = 4.7µH)
100
90
80
70
60
50
100
90
80
70
60
50
40
30
20
10
0
40
VIN = 6V
VIN = 8V
VIN = 12V
VIN = 18V
VIN = 24V
VIN = 6V
VIN = 8V
30
20
10
0
VIN = 12V
VIN = 18V
VIN = 24V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Step-Down Converter DC Regulation
Step-Down Converter DC Regulation
(VOUT = 3.3V; L = 4.7µH)
(VOUT = 5V; L = 4.7µH)
3.0
2.5
2.0
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0.0
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
VIN = 6V
VIN = 6V
-0.5
-1.0
-1.5
-2.0
V
IN = 8V
V
IN = 8V
IN = 12V
VIN = 12V
VIN = 18V
VIN = 24V
V
VIN = 18V
VIN = 24V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Step-Down Converter Line Regulation
Step-Down Converter Line Regulation
(VOUT = 3.3V; L = 4.7µH)
(VOUT = 5V; L = 4.7µH)
1.5
1.0
2.0
1.5
1.0
0.5
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
0.0
IOUT = 0.1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 600mA
IOUT = 0.1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 600mA
IOUT = 1200mA
-0.5
-1.0
-1.5
I
OUT = 1200mA
6
8
10
12
14
16
18
20
22
24
6
8
10
12
14
16
18
20
22
24
Input Voltage (V)
Input Voltage (V)
w w w . a n a l o g i c t e c h . c o m
1184.2008.07.1.0
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
