AAT1142
800mA Voltage-Scaling Step-Down Converter
Typical Characteristics
Output Ripple
(VIN = 4.2V; VOUT = 0.8V; No Load)
Output Ripple
(VIN = 4.2V; VOUT = 0.8V; IOUT = 650mA)
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
0.74
0.73
0.72
0.80
0.78
0.76
0.74
0.72
0.70
0.68
0.66
0.64
0.62
0.60
0.90
0.85
0.80
0.75
0.70
0.65
0.10
0.08
0.06
0.04
0.02
0.00
-0.02
0.60
Time (4µs/div)
Time (200ns/div)
Output Programming Step
Output Programming Step
from 0.9V to 1.2V
(VIN = 3.6V; ROUT = 1.85ΩΩ)
1.30
from 1.2V to 0.9V
(VIN = 3.6V; ROUT = 1.85ΩΩ)
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
1.30
1.20
1.10
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.90
1.20
1.10
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
Time (50µs/div)
Time (50µs/div)
1142.2006.07.1.0
9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
