Datasheet > RT8884B

RT8884B

更新时间： 2024-02-11 22:01:02

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
46页	843K
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技术参数
数据手册

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RT8884B 技术参数

Status：	Active	Vin (min) (V)：	10.8
Vin (max) (V)：	13.2	Vout (min) (V)：	0.5
Vout (max) (V)：	3.04	Number of Phases：	4
Accuracy (Vout>=1V) (+/- %)：	0.5	Freq Adj：	Yes
Freq (typ) (kHz)：	300	Features：	OCP;OVP;Power Good;UVP
Package Type：	WQFN4x4-32

RT8884B 数据手册

RT8884B

Multi-Phase PWM Controller for CPU Core Power Supply

General Description

Features

^ꢀIntel VR12.5 Serial VID Interface Compatible

^ꢀ4/3/2/1 Phase PWM Controller

^ꢀG-NAVP^TMTopology

The RT8884B is a 4/3/2/1 multi-phase synchronous Buck

controller designed to meet Intel VR12.5 compatible CPU

specification with a serial VID control interface. The

RT8884B adoptsG-NAVP^TM(GreenNativeAVP) which is

Richtek's proprietary topology derived from finiteDC gain

of EA amplifier with current mode control, making it easy

to set the droop to meet all Intel CPU requirements of

AVP (Adaptive Voltage Positioning). Based on the G-

NAVP^TMtopology, the RT8884B also features a quick

response mechanism for optimized AVP performance

during load transient. The RT8884B supports mode

transition function with various operating states. A Serial

VID (SVID) interface is built in the RT8884B to

communicate with Intel VR12.5 compliant CPU. The

RT8884B supports VID on-the-fly function with three

different slew rates : Fast, Slow and Decay. By utilizing

the G-NAVP^TMtopology, the operating frequency of the

RT8884B varies with VID, load current and input voltage

to further enhance the efficiency even in CCM. Besides

G-NAVP^TM, the CCRCOT (Constant Current Ripple

Constant On Time) technology provides superior output

voltage ripple over the entire input/output range.

^ꢀ0.5% DAC Accuracy

^ꢀDifferential Remote Voltage Sensing

^ꢀBuilt-in ADC for Platform Programming

^ꢀAccurate Current Balance

^ꢀSystem Thermal Compensated AVP

^ꢀDiode Emulation Mode at Light Load Condition for

Single Phase Operation

^ꢀFast Transient Response

^ꢀVR Ready Indicator

ꢀ Thermal Throttling

ꢀ Current Monitor Output

ꢀ OVP, UVP, OCP, NVP, UVLO

ꢀ External No-Load Offset Setting

ꢀ DVID Enhancement

ꢀ Small 32-Lead WQFN Package

ꢀ RoHS Compliant and Halogen Free

Applications

ꢀ VR12.5 Intel Core Power Supply

ꢀ Notebook/Desktop Computer/Servers Multi-phase CPU

Core Power Supply

ꢀ AVP Step-Down Converter

Simplified Application Circuit

RT8884B

RT9624A

PWM1

PWM2

PWM3

PWM4

VR_RDY

VR_HOT

To PCH

RT9624A

CORE

VCLK

VDIO

To CPU

ALERT

is a registered trademark of Richtek Technology Corporation.

DS8884B-01 September 2013

www.richtek.com

12 3 4 5 6 7...46

中文翻译

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