Datasheet > RT8877F

RT8877F

更新时间： 2024-01-28 15:37:23

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
41页	550K
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RT8877F 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

RT8877F 数据手册

RT8877F

Dual-Output PWM Controller for AMD SVI2 CPU Power

Supply

General Description

Features

^4/3/2/1-Phase (VDD) + 2/1/0-Phase (VDDNB) PWM

The RT8877F is a 4 + 2 phases PWM controller, and is

compliant withAMDSVI2 Voltage Regulator Specification

to support both CPU core (VDD) andNorthbridge portion

of the CPU (VDDNB). The RT8877F features CCRCOT

(Constant Current Ripple Constant On-Time) with the

G-NAVP (Green-Native AVP), which is Richtek's

proprietary topology. TheG-NAVP makes it an easy setting

controller to meet allAMDAVP (Active Voltage Positioning)

VDD/VDDNB requirements. The droop is easily

programmed by setting theDC 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 RT8877F provides special purpose offset capabilities

by pin setting. The RT8877F also provides power good

indication, over-current indication (OCP_L) and dual OCP

mechanism for AMD SVI2 CPU core and NB. It also

features fault protection functions, including over-voltage,

under voltage and negative voltage protections.

Controller

^G-NAVP^TMTopology

^Support Dynamic Load-Line and Zero Load-Line

^Diode Emulation Mode at Light Load Condition

^SVI2 Interface to Comply AMD Power Management

Protocol

^Build-in ADC for V_OUTand I_OUTReporting

^Immediate OV, UV and NV Protections and UVLO

^Programmable Dual OCP Mechanism

^0.5% DAC Accuracy

 Fast Transient Response

 Power Good Indicator

 Over-Current Indicator

 52-Lead WQFN Package

 RoHS Compliant and Halogen Free

Applications

 AMD SVI2 CPU

 Desktop Computer

Simplified Application Circuit

RT8877F

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.

DS8877F-00 April 2018

www.richtek.com

12 3 4 5 6 7...41

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