AAT2786 Datasheet, PDF (9/27 Pages) Advanced Analogic Technologies – 1.5A Step-Down Converter and 150mA LDO

SystemPower^TM
PRODUCT DATASHEET
AAT2786
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)
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
Temperature (°C)
Line Regulation
(V_OUT = 1.8V; I_OUT = 1A)
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
Supply Voltage (V)
Switching Frequency vs. Input Voltage
(I_OUT = 1A)
1.40
1.39
1.38 V_OUT = 1.8V V_OUT = 2.5V
1.37
1.36
1.35
V_OUT = 3.3V
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
Input Voltage (V)
EN
(2V/div)
V_OUT
(1V/div)
I_IN
(500mA/div)
Enable Soft Start
(V_OUT = 3.6V; I_OUT = 1.5A)
Time (100µs/div)
P-Channel R_DS(ON) vs. Input Voltage
180
170 120°C
160
150
140 85°C
130
120 _25°C
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
Input Voltage (V)
N-Channel R_DS(ON) vs. Input Voltage
150
140
120°C
130
120
110
100 ^85°C
90
80 25°C
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
Input Voltage (V)
2786.2008.04.1.0
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