RT9261B
Typical Application Circuit
Preliminary
D1
L1
V
IN
27
µ
H
1N5819
RT9261B
LX
VOUT
GND
V
OUT
+
-
Co
22
µ
F
D1
L1
V
IN
27
µ
H
1N5819
RT9261B
LX
VOUT
CE
GND
V
OUT
+ Co
-
22
µ
F
* L1 ranges from 27µH to 120µH
Pin Description
Pin No.
-xxCX
1
2
3
--
--
-xxCB
4
2
5
1
3
Pin Name
GND
VOUT
LX
CE
NC
Ground
Output Voltage
Pin for Switching
Chip Enable (Active High)
No Connection
Pin Function
Function Block Diagram
LX
LXSW
Buffer
GND
VFM Control
OSC 190kHz
Chip Enable
-
+
Error Amp.
VOUT
VLX Limiter
Vref
CE
www.richtek-ic.com.tw
DS9261B-03 September 2001
2