AAT2505
Dual Channel, Step-Down
Converter/Linear Regulator
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Step-Down Converter
P-Channel RDS(ON) vs. Input Voltage
(EN = VIN; ENLDO = GND)
Step-Down Converter
N-Channel RDS(ON) vs. Input Voltage
(EN = VIN; ENLDO = GND)
750
700
650
600
550
500
450
400
350
300
750
700
650
120°C
100°C
120°C
100°C
600
550
500
450
400
350
300
85°C
85°C
25°C
25°C
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Input Voltage (V)
Step-Down Converter Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 1.8V;
C1 = 4.7µF; ENLDO = GND)
Step-Down Converter Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 2.5V;
C1 = 4.7µF; ENLDO = GND)
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
Time (50µs/div)
Time (50µs/div)
Step-Down Converter Line Transient
(VOUT = 1.8V @ 400mA)
Step-Down Converter Line Regulation
(VOUT = 1.8V)
0.40
0.30
0.20
0.10
0.00
-0.10
-0.20
-0.30
-0.40
1.84
1.82
1.80
1.78
1.76
1.74
7.6
6.6
5.6
4.6
3.6
2.6
IOUT = 10mA
IOUT = 1mA
IOUT = 400mA
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Time (25µs/div)
Input Voltage (V)
10
2505.2006.06.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
