RT9261/A
Function Block Diagram
Preliminary
VLX Limiter
LX
Vref
LXSW
VOUT
Buffer
GND
EXT
_
+
VFM Control
Error Amp.
OSC 100kHz
Chip Enable
CE
Notes:
(1) LX Pin .……
(2) EXT Pin ……
(3) CE Pin ……
only for 9261-ꢀꢀCX and 9261-ꢀꢀCB
only for 9261A-ꢀꢀCX and 9261A-ꢀꢀCB
only for 9261-ꢀꢀCB and 9261A-ꢀꢀCB
Pin Description
Pin No.
Pin Name
Pin Function
-xxCX A-xxCX -xxCB A-xxCB
1
2
1
2
4
2
5
--
1
3
4
2
--
5
1
3
GND
VOUT
LX
Ground
Output Voltage
3
--
3
Pin for Switching
Drive External Device
Chip Enable (Active High)
No Connected
--
--
--
EXT
CE
--
--
NC
www.richtek-ic.com.tw
DS9261/A-03 January 2002
6