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RT9903B Datasheet(PDF) 7 Page - Richtek Technology Corporation

Part # RT9903B
Description  4 Channel DC/DC Converters IC with High-Efficiency Step-Up
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9903B Datasheet(HTML) 7 Page - Richtek Technology Corporation

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RT9903B
Preliminary
7
DS9903B-07 August 2007
www.richtek.com
Typical Operating Characteristics
CH1 Efficiency vs. Output Current
65
70
75
80
85
90
95
100
0
5
10
15
20
25
30
35
40
45
50
Output Current (mA)
VIN = 4.5V
VIN = 3.8V
VIN = 3V
VIN = 2.5V
VOUT = 12V
VLX1 & Output Ripple
Time (1us/Div)
VBAT = 3V, VDD = 3.3V, @IOUT = 30mA
VLX1 & Output Ripple
Time (1us/Div)
VBAT = 2.5V, VDD = 3.3V, @IOUT = 30mA
VLX1 & Output Ripple
Time (1us/Div)
VBAT = 3.8V, VDD = 3.3V, @IOUT = 30mA
VLX1 & Output Ripple
Time (1us/Div)
VBAT = 4.2V, VDD = 3.3V, @IOUT = 30mA
CH2 Efficiency vs. Output Current
70
75
80
85
90
95
100
0
5
10
15
20
25
30
Output Current (mA)
VIN = 4.5V
VIN = 3.8V
VIN = 3V
VIN = 2.5V
VOUT = 15V


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