AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
No Load Input Current vs. Temperature
(VCC = VP)
12
VCC = 5.5V VCC = 5.0V
10
8
6
4
VCC = 4.2V VCC = 3.6V
VCC = 2.7V
2
0
-20
-5
10
25
40
55
70
85
Temperature (°C)
Non-Switching IQ vs. Temperature
(FB = 0V; VP = VCC)
200
190
180
170
160
150
140
130
120
110
100
-20
VCC = 5.5V
VCC = 5.0V
VCC = 2.7V
VCC = 3.6V
VCC = 4.2V
-5
10
25
40
55
70
85
Temperature (°C)
Switching Waveform
(VIN = 3.6V; VOUT = 1.5V; IOUT = 1.2A)
V(LX)
2V/div
IL
500mA/div
Transient Response
(VIN = 3.6V; VOUT = 1.5V; ILOAD = 0.25 to 1.2A)
VOUT
50mV/div
Inductor Current
500mA/div
500nsec/div
Output Ripple
(VIN = 3.6V; VOUT = 1.5V; IOUT = 0A)
VOUT
5mV/div
BW = 20MHz
LX
2V/div
500nsec/div
1150.2005.03.1.2
20µs/div
Output Ripple
(VIN = 3.6V; VOUT = 1.5V; IOUT = 1A)
VOUT
5mV/div
BW = 20MHz
LX
2V/div
500nsec/div
7