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RT9903 Datasheet(PDF) 8 Page - Richtek Technology Corporation

Part # RT9903
Description  5 Channel DC/DC Converters IC with High-Efficiency Step-Up
PDF  15 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9903 Datasheet(HTML) 8 Page - Richtek Technology Corporation

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RT9903
Preliminary
8
DS9903-07 August 2007
www.richtek.com
CH3 Efficiency vs. Input Voltage
75
80
85
90
95
100
2
2.4
2.8
3.2
3.6
4
4.4
Input Voltage (V)
4 series WLED, ILED = 20mA
VLX3 & Output Ripple
Time (1us/Div)
VBAT = 2.5V, VDD = 3.3V, @IOUT = 20mA
VLX2 & Output Ripple
Time (1us/Div)
VBAT = 4.2V, VDD = 3.3V, @IOUT = 30mA
VLX2 & Output Ripple
Time (1us/Div)
VBAT = 3.8V, VDD = 3.3V, @IOUT = 30mA
VLX2 & Output Ripple
Time (1us/Div)
VBAT = 2.5V, VDD = 3.3V, @IOUT = 30mA
VLX2 & Output Ripple
Time (1us/Div)
VBAT = 3V, VDD = 3.3V, @IOUT = 30mA



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