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RT9902 Datasheet(PDF) 5 Page - Richtek Technology Corporation

Part # RT9902
Description  4 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
PDF  21 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9902 Datasheet(HTML) 5 Page - Richtek Technology Corporation

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RT9902
Preliminary
5
DS9902-10 August 2007
www.richtek.com
Function Block Diagram
ENM
EN1
EN2
EN3
Charge
Pump
CH1 + Linear
Controller
CH2
CH3
0
X
X
X
Off
Off
Off
Off
1
0
0
0
On
Off
Off
Off
1
1
0
0
On
On
Off
Off
1
1
1
0
On
On
On
Off
1
1
1
1
On
On
On
On
Linear
Controller
CH4
Charge Pump
Soft-Start
OSC
PWM
OSC
CH1
Current-MODE
Asynchronous
Step-Up
PWM
Boost
CH2
Current-MODE
Synchronous
Step-Down
PWM
Buck2
CH3
Current-MODE
Synchronous
Step-Down
PWM
Buck3
LDO_O
LFB
CX
CPFB
SS
RT
VDDM
ENM
GND
VDD1
EN1
LX1
FB1
COMP1
PGND1
VDD2
EN2
LX2
FB2
COMP2
PGND2
VDD3
EN3
LX3
FB3
COMP3
PGND3
Thermal
Shutdown
EN
VDDC
EN



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