DS8813D Datasheet, PDF (1/23 Pages) Richtek Technology Corporation – Multi-Phase PWM Controller with PWM-VID Reference

®
RT8813D
Multi-Phase PWM Controller with PWM-VID Reference
General Description
The RT8813D is a 3/2/1 phase synchronous Buck PWM
controller which is optimized for high performance graphic
microprocessor and computer applications. The IC
integrates a Constant-On-Time (COT) PWM controller, two
MOSFET drivers with internal bootstrap diodes, as well
as channel current balance and protection functions
including Over Voltage Protection (OVP), Under Voltage
Protection (UVP), current limit, and thermal shutdown into
the WQFN-24L 4x4 package.
The RT8813D adopts R_DS(ON) current sensing technique.
Current limit is accomplished through continuous inductor-
current-sense, while R_DS(ON) current sensing is used for
accurate channel current balance. Using the method of
current sampling utilizes the best advantages of each
technique.
The RT8813D features external reference input and PWM-
VID dynamic output voltage control, in which the feedback
voltage is regulated and tracks external input reference
voltage. Other features include adjustable switching
frequency, dynamic phase number control, internal soft-
start, power good indicator, and enable functions.
Ordering Information
RT8813D
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 1)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
 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.
Marking Information
4E= : Product Code
4E=YM
DNN
YMDNN : Date Code
Features
 Multi-Phase PWM Controller
 Two Embedded MOSFET Drivers and Embedded
Switching Boot Diode
 External Reference Input Control
 PWM-VID Dynamic Voltage Control
 Dynamic Phase Number Control
 Lossless R_DS(ON) Current Sensing for Current Balance
 Adjustable Current Limit Threshold
 Adjustable Switching Frequency
 UVP/OVP Protection
 Shoot Through Protection and Short Pulse Free
Technology
 Support an Ultra-Low Output Voltage as Standby
Voltage
 Thermal Alert Indicator in 2/1 Active Phase
Application
 Thermal Shutdown
 Power Good Indicator
 RoHS Compliant and Halogen Free
Applications
 CPU/GPU Core Power Supply
 Notebook PC Memory Power Supply
 Chipset/RAM Power Supply
 Generic DC/DC Power Regulator
Pin Configuration
(TOP VIEW)
BOOT1 1
UGATE1 2
EN 3
PSI 4
VID 5
REFADJ 6
24 23 22 21 20 19
18 BOOT2
17 UGATE2
GND
16 PGOOD
15 VCC/ISEN1
25 _{14 TALERT/ISEN2}
13 TSNS/ISEN3
7 8 9 10 11 12
WQFN-24L 4x4
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8813D-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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