RT7273
Applications
Marking Information
RT7273GQW : Product Number
Set Top Boxes
Blu-ray DVD
DVR
DTV
Car Audio/Video
Security Camera
RT7273
GQW
YMDNN
YMDNN : Date Code
Pin Configurations
RT7273
Package Type
QW : WQFN-40L 6x6 (W-Type)
(Exposed Pad-Option 2)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
�½
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
RLIM3
SS3
COMP3
FB3
SYNC
ROSC
FB1
COMP1
SS1
RLIM1
EN3
BOOT3
VIN3
LX3
LX3
GND
VINR
VINR
VINR
GND
40 39 38 37 36 35 34 33 32 31
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16 17 18 19 20
41
30
29
28
27
26
25
24
23
22
21
Ordering Information
(TOP VIEW)
GND
GND
VCC
PVCC
PGOOD
GND
LOWP
FB2
COMP2
SS2
RLIM2
Functional Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
Pin Name
RLIM3
SS3
COMP3
FB3
SYNC
ROSC
FB1
COMP1
SS1
Pin Function
Current Limit Setting for CH 3. Connect a resistor from RLIM3 to GND to set
the peak current limit on the output inductor.
Soft-Start Time Setting for CH 3. Connect a capacitor to this pin and GND
for soft-start time setting.
Compensation Node for CH 3. COMP is used to compensate the regulation
control loop. Connect a series RC network from COMP to GND. In some
cases, an additional capacitor from COMP to GND is required.
Feedback Voltage Input for CH 3.
Synchronous Clock Input. Connect to GND if not used.
Oscillator Setting. Connect a resistor from ROSC to GND to set the
switching frequency.
Feedback Voltage Input for CH 1.
Compensation Node for CH 1. COMP is used to compensate the regulation
control loop. Connect a series RC network from COMP to GND. In some
cases, an additional capacitor from COMP to GND is required.
Soft-Start Time Setting for CH 1. Connect a capacitor to this pin and GND
for soft-start time setting.
Copyright
©
2014 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
EN1
BOOT1
VIN1
LX1
LX1
LX2
LX2
VIN2
BOOT2
EN2
�½
WQFN-40L 6x6
DS7273-04
October 2014
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
