1.5A, 1.4MHz Step-Down Converter
Typical Characteristics
Switching Frequency vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 1A)
AAT1112
Line Regulation
(V
OUT
= 1.8V; I
OUT
= 1A)
0.12
Switching Frequency (MHz)
Output Voltage Error (%)
-20
0
20
40
60
80
1.40
1.38
1.36
1.34
1.32
1.30
1.28
1.26
1.24
-40
0.10
0.08
0.06
0.04
0.02
0.00
-0.02
-0.04
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
°
Temperature (°C)
Supply Voltage (V)
Switching Frequency vs. Input Voltage
(I
OUT
= 1A)
Enable Soft Start
(V
OUT
= 3.6V; I
OUT
= 1.5A)
Switching Frequency (MHz)
1.40
1.39
1.38
1.37
1.36
1.35
1.34
1.33
1.32
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
V
OUT
= 1.8V V
OUT
= 2.5V
EN
(2V/div)
V
OUT
(1V/div)
I
IN
(500mA/div)
Time (100µs/div)
V
OUT
= 3.3V
Input Voltage (V)
P-Channel R
DS(ON)
vs. Input Voltage
180
170
160
150
N-Channel R
DS(ON)
vs. Input Voltage
120°C
140
130
120°C
R
DS(ON)
(mΩ)
Ω
150
140
130
120
110
100
90
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
R
DS(ON)
(mΩ)
Ω
120
110
100
90
80
70
60
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
85°C
25°C
85°C
25°C
Input Voltage (V)
Input Voltage (V)
8
1112.2007.01.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
