RT9911_11 Datasheet, PDF (4/32 Pages) Richtek Technology Corporation – 6 Channel DC/DC Converters

RT9911
Functional Pin Description
Pin No. Pin Name Pin Function
I /O
1 GND
Analog Ground Pin
--
2 OK2
External Switch Control.
OUT
3 RT
Frequency Setting Pin. Frequency
OUT
is 500kHz if RT pin not connected.
5 VDDM Device Input Power Pin
IN
6 GND
Analog Ground Pin
--
4 VREF
1.0V Reference Pin
OUT
7 FB1
Feedback Input Pin of CH1.
8
COMP1 ^{Feedback Compensation Pin of}
CH1.
9 PGND1 Power Ground Pin of CH1.
10 LX1
Switch Node of CH1.
11 PVDD1 Power Input Pin of CH1.
12 COMP5 ^{Feedback Compensation Pin of}
CH5.
13 FB5
Feedback Input Pin of CH5.
IN
OUT
--
OUT
IN
OUT
IN
14 EXT5
External Power Switch of CH5.
OUT
Power Input Pin of CH4, CH5 and
15 PVDD5
IN
CH6.
Feedback Compensation Pin of
16 COMP4
CH4.
OUT
17 FB4
Feedback Input Pin of CH4.
IN
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4
Internal State at
Shut Down
--
I/O Configuration
OK 2
GND
High Impedance
Pull Low
VDDM
+
--
-
--
GND
1.0V +
High Impedance
-
RT
VDDM
High Impedance
Pull Low
--
High Impedance
--
Pull Low
High Impedance
Pull High
--
VREF
0.8V + COMP1
FB1 -
PVDD1
LX1
PGND1
FB5
+ COMP5
-
PVDD5
EXT5
Pull Low
High Impedance
1.0V + COMP4
FB4 -
To be continued
DS9911-05 April 2011