PRODUCT DATASHEET
AAT1218
TM
SwitchReg
1A, 1.2MHz Synchronous Boost Converter
Typical Characteristics
VIN = 3.6V, VOUT = 3.6V, CIN = 22μF, COUT = 44uF; L = 2.2μH; TA = 25°C, unless otherwise noted.
Maximum Load Current at Startup vs. VIN
AAT1218 3.3V Output Efficiency
10000
100
90
80
70
60
50
40
30
20
10
0
1000
100
10
VIN = 1.2V
VIN = 1.5V
VIN = 1.8V
VIN = 2.4V
VOUT = 3.3V
VOUT = 5V
0.85
1.35
1.85
2.35
2.85
3.35
3.85
4.35
4.85
0.1
1
10
100
1000
ILOAD (mA)
Input Voltage (V)
AAT1218 5.0V Output Efficiency
AAT1218 5.0V Output Efficiency
100
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
VIN = 3.0V
VIN = 3.3V
VIN = 3.6V
VIN = 1.2V
VIN = 1.5V
VIN = 2.4V
VIN = 4.2V
0.1
1
10
100
1000
0.1
1
10
100
1000
10000
ILOAD (mA)
ILOAD (mA)
Soft Start Waveform
Anti-Ringing Operation
(VIN = 1.5V; VOUT = 5V; Load = 100mA)
(VIN = 3V; VOUT = 5V; Load = 10mA)
LX
VOUT
(AC Coupled)
(20mV/div)
(4V/div)
0
0
0
VOUT
(4V/div)
IIN
LX
(2V/div)
(0.5A/div)
0
0
VEN
(1V/div)
0
Time (200µs/div)
Time (0.2µs/div)
w w w . a n a l o g i c t e c h . c o m
6
1218.2008.10.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
