RT9166/A
1
2
3
1
2
3
1
3
2
1
2
3
1
2
3
VOUT
GND
GND VIN
(TAB)
VIN
(TAB)
VOUT
GND
VOUT
GND
VIN
(TAB)
VOUT GND
(TAB)
VIN
VOUT
VIN
SOT-89 (L-Type)
SOT-89
SOT-223
SOT-223 (L-Type)
TO-252
Typical Application Circuit
RT9166/A
VIN VOUT
GND
V
V
IN
OUT
C
C
OUT
IN
1uF
1uF
Note: To prevent oscillation, a 1μF minimum X7R or X5R dielectric is strongly recommended if ceramics are
used as input/output capacitors. When using the Y5V dielectric, the minimum value of the input/output
capacitance that can be used for stable over full operating temperature range is 3.3μF. (see Application
Information Section for further details)
Functional Pin Description
Pin Name
Pin Function
VIN
Supply Input
VOUT
GND
Regulator Output
Common Ground
Function Block Diagram
VIN
VOUT
Error
Amplifier
Current
Limiting
Sensor
-
Thermal
Shutdown
1.2V
Reference
GND
www.richtek.com
2
DS9166/A-18 June 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
