RT9911
CH4 Output Voltage vs. VDDM Voltage
CH4 Output Voltage vs. VDDM Voltage
11.88
11.87
11.86
11.85
11.84
11.83
11.82
11.81
11.80
11.79
11.78
15.42
15.41
15.40
15.39
15.38
15.37
15.36
15.35
15.34
15.33
15.32
VIN = 2.5V, PVDD5 = 3.3V, IOUT = 30mA
VIN = 2.5V, PVDD5 = 3.3V, IOUT = 30mA
2.4
2.8
3.2
3.6
4
4.4
4.8
5.2
5.6
2.4
2.8
3.2
3.6
4
4.4
4.8
5.2
5.6
VDDM Voltage (V)
VDDM Voltage (V)
CH4 Boost Output Voltage vs. Output Current
CH5 Inverting Efficiency vs. Output Current
100
15.780
VIN = 3.7V, VOUT = 15.5V
15.775
15.770
15.765
15.760
15.755
15.750
15.745
15.740
15.735
15.730
90
80
70
60
50
40
30
20
10
0
VIN = 1.5V
= 2.0V
= 2.5V
= 4.5V
= 3.2V
= 3.8V
VOUT = -8V
100
0
10 20 30 40 50 60 70 80 90 100
Output Current (mA)
1
10
Output Current (mA)
CH5 LX5 and Output Voltage Ripple
CH5 Load Transient Response
VIN = 1.8V, VOUT = -8V
VIN = 1.8V, VOUT = -8V, IOUT = 50mA
Time (1ms/Div)
Time (1μs/Div)
DS9911-04 August 2007
www.richtek.com
17
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
