Dual Channel 600mA Step-Down Converter
Typical Characteristics
Frequency vs. Input Voltage
(V
IN
= 3.6V;
V
OUT
= 1.8V; I
LOAD
= 150mA; L = 2.2µH)
AAT2514
Frequency vs. Temperature
(V
IN
= 3.6V;
V
OUT
= 1.8V; I
LOAD
= 150mA; L = 2.2µH)
Switching Frequency (MHz)
1.8
1.7
1.6
1.5
1.4
1.3
1.2
-40
-25
-10
5
20
35
50
65
80
Switching Frequency (MHz)
1.58
1.56
1.54
1.52
1.50
1.48
1.46
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Input Voltage (V)
Temperature (
°
C)
R
DS(ON)
vs. Input Voltage
(T
A
= 25ºC)
0.45
0.40
0.612
0.609
0.606
V
FB
vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V; I
LOAD
= 0mA)
Voltage (V)
R
DS(ON)
(Ω)
0.35
0.30
0.25
0.20
2.0
Main switch
0.603
0.600
0.597
0.594
Synchronous switch
2.4
2.8
3.2
3.6
4.0
4.4
4.8
5.2
5.6
6.0
0.591
0.588
-45
-30
-15
0
15
30
45
60
75
90
Input Voltage (V)
Temperature (°C)
°
Load Transient Response
(
Light Load Mode to PWM Mode; L = 2.2µH;
C
IN
= 10µF; C
OUT
= 10µF; V
IN
= 3.6V; V
OUT
= 1.8V)
V
SW
(2V/div)
V
OUT
(200mV/div)
I
OUT
(400mA/div)
Load Transient Response
(
PWM Mode Only; I
LOAD
= 180mA to 400mA; L = 2.2µH;
C
IN
= 10µF; C
OUT
= 10µF; V
IN
= 3.6V; V
OUT
= 1.8V)
V
SW
(2V/div)
V
OUT
(200mV/div)
I
OUT
(500mA/div)
Time (20µs/div)
Time (20µs/div)
6
2514.2007.06.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
