AAT2500M Datasheet, PDF (5/22 Pages) Advanced Analogic Technologies – 400mA Step-Down Converter and 300mA LDO

AAT2500M
400mA Step-Down Converter and 300mA LDO
Typical Characteristics
LDO Dropout Voltage vs. Temperature
210
180
I_L = 300mA
150
120
I_L = 200mA
90
60
I_L = 100mA
30
I_L = 50mA
0
-40
-20
0
20
40
60
80
100
Temperature (°C)
LDO Dropout Characteristics
(V_OUT = 3.3V)
3.5
3.4 _{IOUT = 10mA}
3.3
I_OUT = 0.1mA
3.2
I_OUT = 50mA
3.1
I_OUT = 300mA
3.0
I_OUT = 200mA
2.9
I_OUT = 100mA
2.8
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
Input Voltage (V)
LDO Dropout Voltage vs. Output Current
250
200
150
100
50
0
0
85°C
25°C
-40°C
50
100
150
200
250
300
350
Output Current (mA)
No Load Quiescent Current vs. Input Voltage
(EN_BUCK = EN_LDO = V_IN)
150
130
85°C
25°C
110
90
70
-40°C
50
30
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
LDO Turn-Off Response Time
(V_IN = 5V; V_OUT = 3.3V; I_OUT = 300mA)
6
4
2
0
3.0
2.0
1.0
0.0
-1.0
Time (50ns/div)
LDO Turn-On Time From Enable
(V_IN = 5V; V_OUT = 3.3V; I_OUT = 300mA)
6
4
2
0
3
2
1
0
-1
Time (40µs/div)
2500M.2007.06.1.0
5