RT9198/A
Functional Pin Description
Pin Name
EN
EN
NC
GND, Exposed Pad
VOUT
VIN
Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low
100kΩ resistor connected to GND when the control signal is floating.
Chip Enable (Active Low). Note that this pin is high impedance. There should be a pull high
100kΩ resistor connected to VIN when the control signal is floating.
No Internal Connection.
Ground. The exposed pad must be soldered to a large PCB and connected to GND for
maximum power dissipation.
Output Voltage.
Input Voltage.
Function Block Diagram
EN/EN
Shutdown
and
Logic Control
V
REF
-
+
Error
Amplifier
VIN
MOS Driver
VOUT
Current-Limit
and
Thermal
Protection
GND
DS9198/A-12 May 2008
www.richtek.com
3
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
