RT6585A/B
Applications
Marking Information
RT6585AGQW
3J= : Product Code
YMDNN : Date Code
Notebook and Sub-Notebook Computers
System Power Supplies
3-Cell and 4-Cell Li+ Battery-Powered Devices
3J=YM
DNN
Ordering Information
RT6585A/B
RT6585BGQW
Pin 1 Orientation
***
(2) : Quadrant 2, Follow EIA-481-D
Package Type
QW : WQFN-20L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Pin Function With
A : LDO3 Always On
B : LDO3/LDO5 Always On
Note :
***Empty means Pin1 orientation is Quadrant 1
Richtek products are :
�½
3H= : Product Code
3H=YM
DNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
EN1
VCLK
PHASE1
BOOT1
UGATE1
20 19 18 17 16
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.
CS1
FB1
LDO3
FB2
CS2
1
2
3
4
5
6
7
8
9 10
15
14
GND
21
13
12
11
LGATE1
BYP1
LDO5
VIN
LGATE2
WQFN-20L 3x3
Functional Pin Description
Pin No.
1
Pin Name
CS1
Pin Function
Current Limit Setting. Connect a resistor to GND to set the threshold for Channel 1
synchronous R
DS(ON)
sense. The GND
PHASE1 current limit threshold is 1/8th
the voltage seen at CS1 over a 0.2V to 2V range. There is an internal 50A
current source from LDO5 to CS1.
Feedback Voltage Input for Channel 1. Connect FB1 to a resistive voltage divider
from VOUT1 to GND to adjust output from 2V to 5.5V.
3.3V Linear Regulator Output. It is always on when VIN is higher than VINPOR
threshold.
Feedback Voltage Input for Channel 2. Connect FB2 to a resistive voltage divider
from VOUT2 to GND to adjust output from 2V to 4V.
Current Limit Setting. Connect a resistor to GND to set the threshold for Channel 2
synchronous R
DS(ON)
sense. The GND
PHASE2 current limit threshold is 1/8th
the voltage seen at CS2 over a 0.2V to 2V range. There is an internal 50A
current source from LDO5 to CS2.
Enable Control Input for Channel 2.
Power Good Indicator Output for Channel 1 and Channel 2. (Logical AND)
is a registered trademark of Richtek Technology Corporation.
2
3
4
FB1
LDO3
FB2
5
6
7
CS2
EN2
PGOOD
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
EN2
PGOOD
PHASE2
BOOT2
UGATE2
�½
DS6585A/B-04 January 2016
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
