PRODUCT DATASHEET
AAT1189
TM
SwitchReg
High Voltage Step-Down Regulator
Typical Characteristics
Step-Down Converter Soft Start
Step-Down Converter Soft Start
(VIN = 12V; VEN = 10V; VOUT = 3.3V; IOUT = 2.5A)
(VIN = 12V; VEN = 10V; VOUT = 5V; IOUT = 2.5A)
15
10
5
15
10
5
0
0
4.0
4.0
2.0
0.0
2.0
0.0
Time (500µs/div)
Time (500µs/div)
Step-Down Converter Switching Frequency
Step-Down Converter Switching Frequency
vs. Temperature
vs. Input Voltage
(VOUT = 5V; L = 4.7µH)
(VIN = 6V to 24V; VOUT = 3.3V; IOUT = 2.5A)
8
500
6
4
490
480
470
460
450
440
2
0
-2
-4
-6
-8
-40
-20
0
20
40
60
80
100
6
8
10
12
14
16
18
20
22
24
Temperature (°C)
Input Voltage (V)
VIH and VIL vs. Input Voltage
No Load Step-Down Converter
Input Current vs. Input Voltage
(VEN = VIN)
1.35
650
600
550
500
450
400
350
300
1.30
1.25
1.20
1.15
1.10
1.05
1.00
VIH
85°C
25°C
-40°C
VIL
6
9
12
15
18
21
24
5
10
15
20
25
Input Voltage (V)
Input Voltage (V)
w w w . a n a l o g i c t e c h . c o m
8
1189.2008.06.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
