SC2643VXSWTRT

更新时间： 2024-10-02 12:59:39

品牌	Logo	应用领域
商升特 - SEMTECH		多相元件控制器
页数	文件大小	规格书
11页	190K
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SC2643VXSWTRT 数据手册

SC2643VX

Multi-Platform

Multi-Phase PWM Controller

POWER MANAGEMENT

Description

The SC2643VX provides a solution for microprocessor core load current on the ground plane. External offset is easy

voltage regulation with up to 4 paralleled PWM channels. to achieve for any platforms and the VID settings. The

The solution can also be configured as 2, 3, or 4-phase enable function is also provided to interface with the cor-

form. This multi-phase buck regulator utilizes the phase- responding system signal for correct start up timing and

shift timing control to allow interleaved switching of the shut down timing.

power switches. This architecture minimizes the core volt-

age ripple and the input current ripple, which leads to op- (Multiple Patents Pending)

timized voltage regulator design for power density, tran-

Features

sient responses, and the thermal performances.

VRD/VRM10.X, VRM9.X, and K-8 compliant

Core Voltage Set Point Accuracy 0.5%

Combi-Sense^TMCurrent Mode Control

Intrinsic Phase Current Matching

Fast Transient Responses

To satisfy the highly dynamic nature of the modern micro-

processors, the SC2643VX adopts peak current mode con-

trol topology which ensures wide control loop bandwidth

and fast transient responses. The current mode control

provides intrinsic phase current matching. The maximum

ripple frequency is greater than 2.8MHz.

Active Droop with Temperature Compensation to

Meet Load Line Slope

Support VID-on-Fly with 5 or 6 bit VID

Enable Function for Power Sequencing

Cycle-by-Cycle Peak Current Limit

Intelligent Over Current Shut Down

Over Voltage Protection When Using Semtech

Combi-Sense^TMDriver

Under Voltage Protection Built in

External programmable Soft-Start

Externally programmable switching frequency (up to

2.8MHz output voltage ripple frequency)

2, 3, or 4-Phase Configurations

One of the outstanding features of the SC2643VX is its

voltage regulation accuracy. Not only does it provide bet-

ter than 0.5% set point accuracy, but also the accuracy to

be fully compliant with stringent load line slope specifica-

tions mandated by the modern microprocessors. Lossless

output current sensing ensures the regulator output volt-

age is accurately positioned according to the load current

condition, and an internal temperature compensation tech-

nology further enhances the performance of voltage accu-

racy.

The patented Combi-Sense^TMtopology is employed by

SC2643VX. The MOSFET R_ds(on)and the output inductor

winding resistance are used to generate the phase current

information. The Combi-Sense^TMMOSFET driver plus the

SC2643VX enables the complete solution.

Applications

Voltage Regulator VRD/VRM10.X

Voltage Regulator VRM9.X

Voltage Regulator K-8

High Current, Low Voltage Step Down DC/DC

Converters

The SC2643VX is a multi-platform controller. It conforms

to Intel VRM/VRD10.X, VRM9.X, and AMD K-8 (Opteron^TM)

VID specifications. With very minor changes of the sche-

matic and the layout, the SC2643VX based solution can

be ported form one platform to another. This greatly ben-

efits system manufactures by reducing design cycle times

and streamlining inventory management.

The SC2643VX supports VID-on-Fly applications for any

platform. The cycle-by-cycle current limit plus the intelli-

gent over current shut down provide the maximum versa-

tility of the system without false tripping under all possible

changes of VID and load conditions. The differential volt-

age feedback sense eliminates the error caused by high

May 11, 2005

www.semtech.com

12 3 4 5 6 7...11

中文翻译

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与SC2643VXSWTRT相关器件

型号	品牌	获取价格	描述	数据表
SC2643VXTSTR	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2643VXTSTRT	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2643VXTWTR	SEMTECH	获取价格	暂无描述
SC2646B	SEMTECH	获取价格	2, 3 or 4 Phase Combi-Sense PWM Controller
SC2646B_1	SEMTECH	获取价格	2, 3 or 4 Phase Combi-SenseTM PWM Controller
SC2646BEVB	SEMTECH	获取价格	2, 3 or 4 Phase Combi-Sense PWM Controller
SC2646BTSTRT	SEMTECH	获取价格	2, 3 or 4 Phase Combi-Sense PWM Controller
SC2647	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2647EVB	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2647SWTR	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller

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