EUP2627
Typical Application Circuit (continued)
Figure 2.
Multiple-Output TFT LCD Power Supply
Pin Configurations
Pin Configurations
Package Type
TDFN-10
Pin Description
PIN
COMP
FB
SHDN
GND
TDFN-10
1
2
3
4.5
6.7
8
9
10
DESCRIPTION
Compensation pin. Output of the internal error amplifier. Capacitor and resistor from
COMP pin to ground.
Voltage feedback pin. Internal reference is 1.24V NOMINAL. Connect a resistor divider
from V
OUT
. V
OUT
=1.24V (1+R
1
/R
2
).
SW
V
IN
FSEL
SS
Shutdown control pin. Pull
SHDN
low to turn off the device.
Analog and power ground.
Power switch pin. Switch connected to the drain of the internal power MOSFET.
Analog power input pin.
Frequency select pin. When FSEL is connected to GND, switching frequency is set to
620kHz. When connected to V
IN
, switching frequency is set to 1.25MHz
Soft-start control pin. Connect a capacitor to control the converter start-up
DS2627
Ver1.0
July 2009
2
EUTECH [ EUTECH MICROELECTRONICS INC ]
