Datasheet > VcoreCont> RT8877C

RT8877C

更新时间： 2024-01-09 16:58:09

品牌	Logo	应用领域
立锜 - RICHTEK		控制器
页数	文件大小	规格书
38页	687K
描述
Dual-Output PWM Controller for AMD SVI2 CPU Power Supply

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技术参数
数据手册

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RT8877C 技术参数

Status：	Active	VID Table Support：	SVI2
Number of Phases：	2;4	Vcc (typ) (V)：	5
Vin (min) (V)：	10.8	Vin (max) (V)：	13.2
Accuracy (Vout>=1V) (+/- %)：	0.5	Freq (typ) (kHz)：
Built-in DAC Generator：	Yes	Number of MOSFET Drivers：
Features：	Diode Emulation Mode;Fast Transient Response;G-NAVP Control;OCP;OVP;Power Good;UVP	Package Type：	WQFN6x6-52
Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS8877F-00.pdf

RT8877C 数据手册

RT8877C

Dual-Output PWM Controller for AMD SVI2 CPU Power

Supply

General Description

Features

^z4/3/2/1-Phase (VDD) + 2/1/0-Phase (VDDNB) PWM

The RT8877C is a 4 + 2 phases PWM controller. Moreover,

it is compliant with AMD SVI2 Voltage Regulator

Specification to support both CPU core (VDD) and

Northbridge portion of the CPU (VDDNB). The RT8877C

features CCRCOT (Constant Current Ripple Constant On-

Time) with G-NAVP (Green-Native AVP), which is a

Richtek's proprietary topology. G-NAVP makes it an easy

setting controller to meet all AMD AVP (Active 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 VDDand VDDNB domains. It can operate in single

phase and diode emulation mode and reach up to 90%

efficiency in different modes according to different loading

conditions. The RT8877C provides special purpose offset

capabilities by pin setting. The RT8877C 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.

Controller

^zG-NAVP^TMTopology

^zSupport Dynamic Load Line and Zero Load Line

^zDiode Emulation Mode at Light Load Condition

^zSVI2 Interface to Comply AMD Power Management

Protocol

^zBuild-in ADC for V_OUTand I_OUTReporting

^zImmediate OV, UV and NV Protections and UVLO

^zProgrammable Dual OCP Mechanism

^z0.5% DAC Accuracy

z Fast Transient Response

z Power Good Indicator

z Over Current Indicator

z 52-Lead WQFN Package

z RoHS Compliant and Halogen Free

Applications

z AMD SVI2 CPU

z Desktop Computer

Simplified Application Circuit

RT8877C

OCP_L

PWM1

PWM2

RT9624A

MOSFET

VDD

SVC

PWM3

To CPU

PWM4

SVD

PWMA1

PWMA2

VDDNB

SVT

is a registered trademark of Richtek Technology Corporation.

DS8877C-00 November 2012

www.richtek.com

12 3 4 5 6 7...38

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