RT9907 Datasheet, PDF (4/19 Pages) Richtek Technology Corporation – 3 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down

RT9907
Function Block Diagram
Preliminary
VDDM ENM
EN
CH1
Current-MODE
Asynchronous
Step-Up
PWM
Boost
CH2
SS
Soft-Start
OSC
Current-MODE
Synchronous
Step-Down
PWM
RT
PWM
OSC
Buck2
Thermal
Shutdown
CH3
Current-MODE
Synchronous
Step-Down
PWM
Buck3
GND
EN1
VDD1
LX1
PGND1
COMP1
FB1
EN2
VDD2
LX2
PGND2
COMP2
FB2
EN3
VDD3
LX3
PGND3
COMP3
FB3
ENM EN1 EN2 EN3
0
XXX
1
00
0
1
10
0
1
11
0
1
11
1
CH1
Off
Off
On
On
On
CH2
Off
Off
Off
On
On
CH3
Off
Off
Off
Off
On
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4
DS9907-07 August 2007