PRODUCT DATASHEET
AAT2786
SystemPower
TM
1.5A Step-Down Converter and 150mA LDO
Typical Characteristics–Step-Down Converter
Switching Frequency vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 1A)
Switching Frequency (MHz)
Output Voltage Error (%)
1.40
1.38
1.36
1.34
1.32
1.30
1.28
1.26
1.24
-40
-20
0
20
40
60
80
0.12
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
Line Regulation
(V
OUT
= 1.8V; I
OUT
= 1A)
Temperature (°C)
°
Supply Voltage (V)
Switching Frequency vs. Input Voltage
(I
OUT
= 1A)
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
Enable Soft Start
(V
OUT
= 3.6V; I
OUT
= 1.5A)
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
R
DS(ON)
(mΩ)
Ω
140
130
120
110
100
90
80
70
60
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
85°C
25°C
85°C
25°C
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)
Input Voltage (V)
2786.2008.04.1.0
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