FAN53180MTC

更新时间： 2024-01-11 16:15:29

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	846K
描述
6-Bit VID Controlled 2-4 Phase DC-DC Controller

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FAN53180MTC 数据手册

www.fairchildsemi.com

FAN53180

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

Features

General Description

• Precision Multi-Phase DC-DC Core Voltage Regulation

– ±±14.5V ꢀutꢁut Voltage Accuracy ꢀver Te5ꢁerature

• Differential Re5ote Voltage Sensing

• Selectable 2, 3, or 1 Phase ꢀꢁeration

• Uꢁ to ±MHz ꢁer Phase ꢀꢁeration (1MHz riꢁꢁle

Frequency)

• Lossless Inductor Current Sensing for Loadline

Co5ꢁensation

– External Te5ꢁerature Co5ꢁensation

• Accurate Load-Line Progra55ing (Meets Intel VRM/

VRD±0 CPU Sꢁeciﬁcations)

The FAN.3±80 is a 5ulti-ꢁhase DC-DC controller for

i5ꢁle5enting high-current, low-voltage, CPU core ꢁower

regulation circuits4 It is ꢁart of a chiꢁset that includes

external MꢀSFET drivers and ꢁower MꢀSFETS4 The

FAN.3±80 drives uꢁ to 1 synchronous-rectiﬁed buck

channels in ꢁarallel4 The 5ulti-ꢁhase buck converter

architecture uses interleaved switching to 5ultiꢁly riꢁꢁle

frequency by the nu5ber of ꢁhases and reduce inꢁut and

outꢁut riꢁꢁle currents4 Lower riꢁꢁle results in fewer co5-

ꢁonents, lower co5ꢁonent cost, reduced ꢁower dissiꢁation,

and s5aller board area4

• Accurate Channel-Current Balancing for Ther5al

ꢀꢁti5ization and Layout Co5ꢁensation

• Convenient ±2V Suꢁꢁly Biasing

• 6-bit Voltage Identiﬁcation (VID) Inꢁut

– 04837.V to ±4600V in ±24.5V Steꢁs

– Dyna5ic VID Caꢁability with Fault-Blanking for

glitch-less ꢀutꢁut voltage Changes

• Adjustable ꢀver Current Protection with Progra55able

Latch-ꢀff Delay

• ꢀver-Voltage Protection — Internal ꢀVP Crowbar

Protection

The FAN.3±80 features a high bandwidth control looꢁ to

ꢁrovide oꢁti5al resꢁonse to load transients4 The FAN.3±80

senses current using lossless techniques: Phase current is

5easured through each of the outꢁut inductors4 This current

infor5ation is su55ed, averaged and used to set the loadline

of the outꢁut via ꢁrogra55able “drooꢁ”4 The drooꢁ is

te5ꢁerature co5ꢁensated to achieve ꢁrecise loadline

characteristics over the entire oꢁerating range4 Additionally,

individual ꢁhase current is 5easured using the R_DS-ꢀNof the

low-side MꢀSFET’s4 This infor5ation is used to dyna5i-

cally balance/steer ꢁer-ꢁhase current4 The ꢁhase currents are

also su55ed and averaged for over-current detection4

Applications

• Co5ꢁuter DC/DC Converter VRM/VRD±040

• Co5ꢁuter DC/DC Converter VRM/VRD94X

• High Current, Low Voltage DC/DC Rail

Dyna5ic-VID technology allows on-the-ﬂy VID changes

with controlled, glitch-less outꢁut4 Additionally, short-circuit

ꢁrotection, adjustable current li5iting, over-voltage ꢁrotec-

tion and ꢁower-good circuitry co5bine to ensure reliable and

safe oꢁeration4 The oꢁerating te5ꢁerature range is 0°C to

+8.°C and the oꢁerating voltage is a single +±2V suꢁꢁly,

si5ꢁlifying design4 The FAN.3±80 is available in a

TSSꢀP-28 ꢁackage4

System Block Diagram

Φ1

FAN53418

Φ2

Φ3

V_OUT

FAN53180

Φ4

FAN53418

REV. 1.0.0 6/10/03

12 3 4 5 6 7...28

中文翻译

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