AAT2506
1MHz Step-Down Converter/LDO 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
750
700
650
650
120°C
100°C
120°C
100°C
600
550
500
600
550
500
450
400
350
300
85°C
85°C
450
25°C
400
25°C
350
300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Input Voltage (V)
Step-Down Converter Load Transient Response
(30mA - 300mA; VIN = 3.6V; VOUT = 1.5V;
Step-Down Converter Load Transient Response
(30mA - 300mA; VIN = 3.6V; VOUT = 2.5V;
C1 = 22μμF; ENLDO = GND)
C1 = 22μμF; ENLDO = GND)
1.65
2.65
1.5
1.5
1.3
1.60
1.55
2.55
1.3
1.50
1.1
1.1
1.45
300mA
2.45
300mA
1.40
0.9
0.9
30mA
30mA
1.35
2.35
0.7
0.7
1.30
1.25
0.5
0.5
2.25
1.20
0.3
0.1
-0.1
1.15
1.10
1.05
1.00
0.3
2.15
2.05
0.1
-0.1
Time (25μs/div)
Time (25μs/div)
Step-Down Converter Line Regulation
(VOUT = 1.5V; ENLDO = GND)
Step-Down Converter Line Transient
(VOUT = 1.8V @ 400mA; EN = VIN; ENLDO = GND)
2
1.5
1
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1.55
1.50
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
IOUT = 600mA
0.5
0
IOUT = 100mA
IOUT = 10mA
-0.5
-1
2.5
3
3.5
4
4.5
5
5.5
6
Time (25μs/div)
Input Voltage (V)
10
2506.2007.05.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
