Datasheet > RT8179B

RT8179B

更新时间： 2024-01-14 07:26:23

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
40页	506K
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RT8179B 技术参数

Status：	Active	VID Table Support：	SVI2
Number of Phases：	1;1	Vcc (typ)(V)：
Vin (min)(V)：	4.5	Vin (max)(V)：	26
Accuracy (Vout>=1V)(+/- %)：	0.5	Freq (typ)(kHz)：
Built-in DAC Generator：	Yes	Number of MOSFET Drivers：	1;1
Features：	Adjustable Frequency;Current Mode Control;DCR Current Sense;Diode Emulation Mode;Droop Control;Enable Input;Fast Transient Response;G-NAVP Control;OCP;OVP;Power Good;SCP;UVP	Package Type：	WQFN5x5-40
Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS8179B-05.pdf

RT8179B 数据手册

RT8179B

Dual-Output PWM Controller with 2 Integrated Drivers for

AMD SVI2 Mobile CPU Power Supply

General Description

Features

^1-Phase (VDD) + 1-Phase (VDDNB) PWM Controller

The RT8179B is a dual-output PWM controller, and is

compliant withAMDSVI2 Voltage Regulator Specification

to support both CPU core (VDD) andNorthbridge portion

of the CPU (VDDNB). The RT8179B features CCRCOT

(Constant Current Ripple Constant On-Time) withG-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

optimizedAVP 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.

^2 Embedded MOSFET Drivers

^G-NAVP^TMTopology

^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 V_OUTand I_OUTReporting

^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

RT8179B

OCP_L

PHASE

MOSFET

VDD

SVC

SVD

SVT

To CPU

PHASEA

VDDNB

is a registered trademark of Richtek Technology Corporation.

DS8179B-05 August 2016

www.richtek.com

12 3 4 5 6 7...40

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