RT9903GQV RICHTEK [Richtek Technology Corporation], RT9903GQV Datasheet - Page 8
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RT9903GQV
Manufacturer Part Number
RT9903GQV
Description
5 Channel DC/DC Converters IC with High-Efficiency Step-Up
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
1.RT9903GQV.pdf
(15 pages)
RT9903
www.richtek.com
8
100
95
90
85
80
75
2
4 series WLED, I
V
V
BAT
BAT
CH3 Efficiency vs. Input Voltage
= 3.8V, V
= 2.5V, V
2.4
V
V
LX2
LX2
DD
DD
2.8
Input Voltage (V)
LED
= 3.3V, @I
= 3.3V, @I
Time (1us/Div)
Time (1us/Div)
&
&
= 20mA
Output Ripple
Output Ripple
3.2
OUT
OUT
= 30mA
= 30mA
3.6
4
Preliminary
4.4
V
V
V
BAT
BAT
BAT
= 4.2V, V
= 3V, V
= 2.5V, V
V
V
V
DD
LX2
LX3
LX2
DD
DD
= 3.3V, @I
= 3.3V, @I
= 3.3V, @I
Time (1us/Div)
Time (1us/Div)
Time (1us/Div)
&
&
&
Output Ripple
Output Ripple
Output Ripple
DS9903-07 August 2007
OUT
OUT
OUT
= 30mA
= 30mA
= 20mA