EUP2627
Typical Application Circuit (continued)
Figure 2. Multiple-Output TFT LCD Power Supply
Pin Configurations
Package Type
Pin Configurations
TDFN-10
Pin Description
PIN
TDFN-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 VOUT. VOUT=1.24V (1+R1/R2).
COMP
1
FB
2
3
SHDN
GND
SW
Shutdown control pin. Pull SHDN low to turn off the device.
Analog and power ground.
4.5
6.7
8
Power switch pin. Switch connected to the drain of the internal power MOSFET.
Analog power input pin.
VIN
Frequency select pin. When FSEL is connected to GND, switching frequency is set to
FSEL
SS
9
620kHz. When connected to VIN, switching frequency is set to 1.25MHz
10
Soft-start control pin. Connect a capacitor to control the converter start-up
DS2627 Ver1.0 July 2009
2
EUTECH [ EUTECH MICROELECTRONICS INC ]
