RT9911
CH3 Boost Efficiency vs. Output Current
CH3 Boost Efficiency vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 4.5V
= 3.8V
VIN = 3.2V
= 2.5V
= 3.2V
= 2.0V
= 2.5V
= 1.5V
= 2.0V
= 1.5V
VOUT = 3.3V
VOUT = 5V
10
100
1000
10
100
1000
Output Current (mA)
Output Current (mA)
CH3 Boost Efficiency vs. Output Current
CH3 LX3 and Output Voltage Ripple
100
90
80
70
60
50
40
30
20
10
0
VIN = 1.8V, VOUT = 3.3V, IOUT = 400mA
VIN = 3.0V Async
= 2.4V Async
= 1.5V Async
= 3.0V Sync
= 2.4V Sync
= 1.5V Sync
VOUT = 3.3V
10
100
1000
Time (1μs/Div)
Output Current (mA)
CH3 LX3 and Output Voltage Ripple
CH3 Load Transient Response
VIN = 3.0V, VOUT = 3.3V
VIN = 1.8V, VOUT = 5V, IOUT = 350mA
Time (1ms/Div)
Time (1μs/Div)
DS9911-04 August 2007
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