FAN53168

更新时间： 2024-11-10 22:50:59

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		控制器
页数	文件大小	规格书
28页	397K
描述
6-Bit VID Controlled 2-4 Phase DC-DC Controller

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FAN53168 数据手册

www.fairchildsemi.com

FAN53168

6-Bit VID Controlled 2-4 Phase DC-DC Controller

Features

General Description

• Precision Multi-Phase DC-DC Core Voltage Regulation

– ±±10V ꢀutꢁut Voltage Accuracy ꢀver Te0ꢁerature

• Differential Re0ote Voltage Sensing

• Selectable 2, 3, or 4 Phase ꢀꢁeration

• Uꢁ to ±MHz ꢁer Phase ꢀꢁeration (4MHz riꢁꢁle

Frequency)

• Lossless Inductor Current Sensing for Loadline

Co0ꢁensation

– External Te0ꢁerature Co0ꢁensation

• Accurate Load-Line Progra00ing (Meets Intel

VRM/VRD±1 CPU Sꢁeciﬁcations)

The FAN53±68 is a 0ulti-ꢁhase DC-DC controller for

i0ꢁle0enting high-current, low-voltage, CPU core ꢁower

regulation circuits. It is ꢁart of a chiꢁset that includes

external MꢀSFET drivers and ꢁower MꢀSFETS. The

FAN53±68 drives uꢁ to 4 synchronous-rectiﬁed buck

channels in ꢁarallel. The 0ulti-ꢁhase buck converter

architecture uses interleaved switching to 0ultiꢁly riꢁꢁle

frequency by the nu0ber of ꢁhases and reduce inꢁut and

outꢁut riꢁꢁle currents. Lower riꢁꢁle results in fewer co0ꢁo-

nents, lower co0ꢁonent cost, reduced ꢁower dissiꢁation, and

s0aller board area.

• Accurate Channel-Current Balancing for Ther0al

ꢀꢁti0ization and Layout Co0ꢁensation

• Convenient ±2V Suꢁꢁly Biasing

• 6-bit Voltage Identiﬁcation (VID) Inꢁut

– .8375V to ±.611V in ±2.50V Steꢁs

– Dyna0ic VID Caꢁability with Fault-Blanking for

glitch-less ꢀutꢁut voltage Changes

The FAN53±68 features a high bandwidth control looꢁ to

ꢁrovide oꢁti0al resꢁonse to load transients. The FAN53±68

senses current using lossless techniques: Phase current is

0easured through each of the outꢁut inductors. This current

infor0ation is su00ed, averaged and used to set the loadline

of the outꢁut via ꢁrogra00able “drooꢁ”. The drooꢁ is te0-

ꢁerature co0ꢁensated to achieve ꢁrecise loadline character-

istics over the entire oꢁerating range. Additionally,

• Adjustable ꢀver Current Protection with Progra00able

Latch-ꢀff Delay

• ꢀver-Voltage Protection - Internal ꢀVP Crowbar

Protection

individual ꢁhase current is 0easured using the R_DS-ꢀNof the

low-side MꢀSFET’s. This infor0ation is used to dyna0i-

cally balance/steer ꢁer-ꢁhase current. The ꢁhase currents are

also su00ed and averaged for over-current detection.

Applications

• Co0ꢁuter DC/DC Converter VRM/VRD±1.1

• Co0ꢁuter DC/DC Converter VRM/VRD9.X

• High Current, Low Voltage DC/DC Rail

Dyna0ic-VID technology allows on-the-ﬂy VID changes

with controlled, glitch-less outꢁut. Additionally, short-circuit

ꢁrotection, adjustable current li0iting, over-voltage ꢁrotec-

tion and ꢁower-good circuitry co0bine to ensure reliable and

safe oꢁeration. The oꢁerating te0ꢁerature range is 1^oC to

+85^oC and the oꢁerating voltage is a single +±2V suꢁꢁly,

si0ꢁlifying design. The FAN53±68 is available in a TSSꢀP-

28 ꢁackage.

System Block Diagram

Φ1

FAN53418

Φ2

V_OUT

FAN53168

Φ3

Φ4

FAN53418

REV. 1.0.0 6/9/03

12 3 4 5 6 7...28

中文翻译

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与FAN53168相关器件

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FAN53168MTC	FAIRCHILD	获取价格	6-Bit VID Controlled 2-4 Phase DC-DC Controller
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