PRODUCT DATASHEET
AAT1141
SwitchRegTM
FastTransient 600mA Step-Down Converter
Typical Characteristics
Step-Down Converter Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 1.0V;
COUT = 10µF; CFF = 0pF)
Step-Down Converter Load Transient Response
(300mA to 400mA; VIN = 3.6V;
VOUT = 1.0V; COUT = 10µF; CFF = 0pF)
VOUT
(100mV/div)
VOUT
(50mV/div)
1.0V
1.0V
400mA
300mA
IOUT
(100mA/div)
300mA
IOUT
(100mA/div)
1mA
Time (40µs/div)
Time (40µs/div)
Step-Down Converter Output Ripple
(VOUT = 1.8V; VIN = 3.6V; IOUT = 1mA; L = 4.7µH;
CFF = 100pF; COUT = 4.7µF)
Line Response
(VOUT = 1.8V @ 400mA)
1.82
1.81
1.80
1.79
1.78
1.77
1.76
6.0
5.5
5.0
4.5
4.0
3.5
3.0
Output
Ripple
1.8V
(20mV/div)
LX
(2V/div)
1.8V
0mA
Inductor
Current
(100mA/div)
Time (25μs/div)
Time (10µs/div)
Step-Down Converter Output Ripple
(VOUT = 1.8V; VIN = 3.6V; IOUT = 600mA;
L = 4.7µH; CFF = 100pF; COUT = 4.7µF)
Output
Ripple
(20mV/div)
1.8V
LX
(2V/div)
0V
Inductor
Current
(100mA/div)
600mA
Time (0.5µs/div)
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1141.2008.07.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
