
RT9001
2
DS9001-04 March 2007
www.richtek.com
Typical Application Circuit
Functional Pin Description
Function Block Diagram
Note: To prevent oscillation, a 1
μ
F 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 3.3
μ
F. (see Application Information
Section for further details)
Pin Name
Pin Function
VIN
Supply Input
VOUT
Regulator Output
GND
Common Ground
Current
Limiting
Sensor
Thermal
Shutdown
+
-
Error
Amplifier
1.2V
Reference
VIN
GND
VOUT
VIN
GND
VOUT
RT9001
C
OUT
1uF
C
IN
1uF
V
IN
V
OUT