RT4503/A
Marking Information
RT4503GQW
Pin Configurations
(TOP VIEW)
1T : Product Code
1
2
3
6
5
4
FB
COMP
GND
VIN
EN
LX
W : Date Code
1TW
7
WDFN-6L 2x2
RT4503
RT4503AGQW
2R : Product Code
W : Date Code
2RW
1
2
3
6
5
4
FB
NC
VIN
EN
LX
7
GND
WDFN-6L 2x2
RT4503A
Functional Pin Description
Pin No.
Pin Name
Pin Function
Feedback Voltage Input. Place a resistor between this pin and GND to set
the current.
1
FB
COMP (RT4503) Connect an External Capacitor to this Pin.
2
NC (RT4503A)
GND
No Internal Connection.
3,
Ground. The exposed pad must be soldered to a large PCB and connected
to GND for maximum thermal dissipation.
7 (Exposed Pad)
4
5
6
LX
Switch Node. Connect the pin to the switch side of the inductor.
Enable Control Input and Pulse Dimming Input.
Supply Voltage Input.
EN
VIN
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS4503/A-03 June 2015
www.richtek.com
2
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
