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  Richtek Technology Electronic Components Datasheet  

RT8179B Datasheet

Dual-Output PWM Controller

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RT8179B pdf
®
RT8179B
Dual-Output PWM Controller with 2 Integrated Drivers for
AMD SVI2 Mobile CPU Power Supply
General Description
The RT8179B is a dual-output PWM controller, and is
compliant with AMD SVI2 Voltage Regulator Specification
to support both CPU core (VDD) and Northbridge portion
of the CPU (VDDNB). The RT8179B features CCRCOT
(Constant Current Ripple Constant On-Time) with G-NAVP
(Green-Native AVP), which is Richtek's proprietary
topology. G-NAVP makes it an easy setting controller to
meet all AMD AVP (Adaptive Voltage Positioning) VDD/
VDDNB requirements. The droop is easily programmed
by setting the DC gain of the error amplifier. With proper
compensation, the load transient response can achieve
optimized AVP performance. The controller also uses the
interface to issue VOTF Complete and to send digitally
encoded voltage and current values for the VDD and
VDDNB domains. It can operate in diode emulation mode
and reach up to 90% efficiency in different modes according
to different loading conditions. The RT8179B provides
special purpose offset capabilities by pin setting. The
RT8179B also provides power good indication, over
current indication (OCP_L) and dual OCP mechanism for
AMD SVI2 CPU core and NB. It also features complete
fault protection functions including over voltage, under
voltage and negative voltage.
Features
1-Phase (VDD) + 1-Phase (VDDNB) PWM Controller
2 Embedded MOSFET Drivers
G-NAVPTM Topology
Support Dynamic Load-Line and Zero Load-Line
Diode Emulation Mode at Light Load Condition
SVI2 Interface to Comply with AMD Power
Management Protocol
Build-in ADC for VOUT and IOUT Reporting
Immediate OV, UV and NV Protections and UVLO
Programmable Dual OCP Mechanisms
DVID Turbo Boost Compensation
0.5% DAC Accuracy
Fast Transient Response
Power Good Indicator
Over Current Indicator
40-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
AMD SVI2 Mobile CPU
Laptop Computer
Simplified Application Circuit
To CPU
RT8179B
OCP_L
PHASE
SVC
MOSFET
SVD
SVT
PHASEA MOSFET
VVDD
VVDDNB
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8179B-04 January 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT8179B Datasheet

Dual-Output PWM Controller

No Preview Available !

RT8179B pdf
RT8179B
Ordering Information
RT8179B
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
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
RT8179BGQW : Product Number
RT8179B
GQW
YMDNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
BOOT 1
TONSET 2
30
29
ISEN1N 3
28
ISEN1P 4
VSEN 5
FB 6
GND
27
26
25
COMP 7
24
RGND 8
IMON 9
41 23
22
V064 10
21
11 12 13 14 15 16 17 18 19 20
PGOODA
EN
ISENA1P
ISENA1N
VSENA
FBA
COMPA
IBIAS
VCC
OCP_L
WQFN-40L 5x5
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8179B-04 January 2015


Part Number RT8179B
Description Dual-Output PWM Controller
Maker Richtek
Total Page 30 Pages
PDF Download
RT8179B pdf
RT8179B Datasheet PDF
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