RT3661AB
Ordering Information
RT3661AB
Pin Configuration
(TOP VIEW)
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
40 39 38 37 36 35 34 33 32 31
30
29
28
27
26
25
1
2
NC
NC
PGOOD
RGND
COMP
FB
VSEN_NB
VSEN
ISEN1P
ISEN1N
BOOT_NB
EN
VIN
COMP_NB
FB_NB
ISENP_NB
ISENN_NB
TSEN_NB
VDDIO
Richtek products are :
RoHS compliant and compatible with the current
3
4
requirements of IPC/JEDEC J-STD-020.
5
GND
6
Suitable for use in SnPb or Pb-free soldering processes.
24
23
22
21
7
8
41
9
10
SVT
Marking Information
11 12 13 14 15 16 17 18 19 20
RT3661ABGQW : Product Number
YMDNN : Date Code
RT3661AB
GQW
YMDNN
WQFN-40L 5x5
Functional Pin Description
Pin No.
Pin Name
Pin Function
1, 2, 39, 40
NC
No internal connection.
Power good indicator for the VDD and VDDNB controller. This pin is an
open drain output.
3
4
PGOOD
RGND
Return ground of VDD and VDDNB controllers. This pin is the common
negative input of output voltage differential remote sense of VDD and
VDDNB controllers.
5
6
COMP
FB
Error amplifier output pin of the VDD controller.
Output voltage feedback input of VDD controller. This pin is the negative
input of the error amplifier for the VDD controller.
VDDNB controller voltage sense input. This pin is connected to the terminal
of VDDNB controller output voltage.
7
8
VSEN_NB
VSEN
VDD controller voltage sense input. This pin is connected to the terminal of
VDD controller output voltage.
9
ISEN1P
Positive current sense input for VDD controller.
10
11
ISEN1N
VRHOT_L
Negative current sense input for VDD controller.
Thermal indicator. This pin is an open drain output. (Active low)
This pin provides two functions : platform setting, platform can use this pin to
set frequency of VDD and VDDNB controllers, initial offset and per-phase
OCP threshold of VDD Controller. The other function is thermal sense input
for VRHOT indicator. Connect the NTC network for thermal sensing to this
pin.
12
TSEN
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS3661AB-05 May 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
