AAT2505 Datasheet, PDF (10/26 Pages) Advanced Analogic Technologies – Dual Channel, Step-Down Converter/Linear Regulator

Typical Characteristics
Unless otherwise noted, V_IN = 5V, T_A = 25°C.
Step-Down Converter
P-Channel R_DS(ON) vs. Input Voltage
(EN = V_IN; ENLDO = GND)
750
700
650
120°C
100°C
600
550
500
85°C
450
25°C
400
350
300
2.5
3 .0
3.5
4 .0
4.5
5 .0
5.5
Input Voltage (V)
AAT2505
Dual Channel, Step-Down
Converter/Linear Regulator
Step-Down Converter
N-Channel R_DS(ON) vs. Input Voltage
(EN = V_IN; ENLDO = GND)
750
700
650
120°C
100°C
600
550
500
450
85°C
400
25°C
350
300
2.5
3 .0
3.5
4 .0
4.5
5 .0
5.5
Input Voltage (V)
Step-Down Converter Load Transient Response
(1mA to 300mA; V_IN = 3.6V; V_OUT = 1.8V;
C1 = 4.7µF; ENLDO = GND)
2.0
1.8
1.9
1.6
1.8
1.4
1.7
1.2
1.6
1.0
1.5
0.8
1.4
0.6
1.3
0.4
1.2
0.2
1.1
0.0
1.0
-0.2
Time (50µs/div)
Step-Down Converter Load Transient Response
(1mA to 300mA; V_IN = 3.6V; V_OUT = 2.5V;
C1 = 4.7µF; ENLDO = GND)
2.9
1.8
2.7
1.6
2.5
1.4
2.3
1.2
2.1
1.0
1.9
0.8
1.7
0.6
1.5
0.4
1.3
0.2
1.1
0.0
0.9
-0.2
Time (50µs/div)
Step-Down Converter Line Transient
(V_OUT = 1.8V @ 400mA)
1.84
7.6
1.82
6.6
1.80
5.6
1.78
4.6
1.76
3.6
1.74
2.6
Time (25µs/div)
10
Step-Down Converter Line Regulation
(V_OUT = 1.8V)
0.40
0.30
0.20
I_OUT = 10mA
0.10
0.00
-0.10
-0.20
I_OUT = 1mA
I_OUT = 400mA
-0.30
-0.40
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
2505.2006.06.1.1