LX1671

更新时间： 2024-11-28 21:55:35

品牌	Logo	应用领域
美高森美 - MICROSEMI		/
页数	文件大小	规格书
21页	447K
描述
Multiple Output LoadSHARE? PWM

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LX1671 数据手册

LX1671

Multiple Output LoadSHARE™ PWM

I N T E G R A T E D P R O D U C T S

PRODUCTION DATA SHEET

KEY FEATURES

DESCRIPTION

Up to Four Independently

Regulated Outputs

Outputs As Low As 0.8V

Generated From An Internal 1%

Reference

Multiphase High Current Output

Reduces Required Capacitance

Integrated High Current MOSFET

Drivers

The LX1671 is a highly integrated

The additional outputs are capable of

power supply controller IC featuring supplying up to 5A (Linear Regulator

three PWM switching regulator stages Driver) and 15A (Switching Regulator)

with an additional onboard linear for I/O, memory, termination, and other

regulator driver.

Two of the constant frequency processor designs.

voltage-mode PWM phases can be

supplies surrounding today’s micro-

Each PWM regulator output is

easily configured for a single Bi-Phase programmed via a simple voltage-divider

high current output or two in- network.

dependently regulated outputs. Each MOSFET R_DS(ON)impedance, monitors

phase incorporates fully pro- current limit conditions, in each PWM

grammable soft-start sequence. This phase, without the use of expensive

versatility yields either three or four current sense resistors.

The LX1671, utilizing

300kHz High Frequency Operation

Minimizes External Component

Requirements

Independent Phase Programmable

Soft-Start and Power Sequencing

Adjustable Linear Regulator Driver

Output

independently regulated outputs with

full power sequencing capability giving design engineers maximum flexibility

system designers the ultimate with respect to the MOSFET supply.

flexibility in power supply design. Each phase can utilize different supply

The LX1671 was designed to give

No current-sense resistors

DDR Termination Compliant

In Bi-Phase operation, the high voltages for efficient use of available

current (>30A) output can utilize supply rails. Additionally, when two

different supply rails allowing Forced phases are configured in Bi-Phase output,

Current Sharing^†from different the LoadSHARE^TMtopology can be

sources. Power loss and noise, due to programmed via inductor ESR selection.

the ESR of the input capacitors, are There are three other methods that can

minimized by operating each PWM also be used with LoadSHARE^TM. These

APPLICATIONS/BENEFITS

Multi-Output Power Supplies

Video Card Power Supplies

PC Peripherals

Portable PC Processor and I/O

Supply

other methods are presented in the theory

of operation section of this data sheet.

output 180° out of phase. This

architecture also minimizes capacitor

requirements while maximizing re-

gulator response.

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

LoadSHARE is a Trademark of Microsemi Corporation

PRODUCT HIGHLIGHT

DDR Termination

Refer to Typical

Application for

complete circuit.

Memory Core

....

12V

Graphics

Controller

Core

Memory Bus

LX1671

DDR Memory

3.3V

I/O

PACKAGE ORDER INFO

Plastic TSSOP

Plastic MLPQ

38-Pin

T_A(°C)

0 to 70

38-Pin

LX1671-CPW

LX1671-CLQ

Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1671CPWTR)

Rev. 1.0a, 2004-06-14

Microsemi

Page 1

Integrated Products, Power Management

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

12 3 4 5 6 7...21

中文翻译

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与LX1671相关器件

型号	品牌	获取价格	描述	数据表
LX1671_06	MICROSEMI	获取价格	Multiple Output LoadSHARE PWM
LX1671BCLQ	MICROSEMI	获取价格	Switching Controller
LX1671CLQ	MICROSEMI	获取价格	Multiple Output LoadSHARE PWM
LX1671-CLQ	MICROSEMI	获取价格	1A SWITCHING CONTROLLER, 345kHz SWITCHING FREQ-MAX, PQCC38, 5 x 7 MM, PLASTIC, MLPQ-38
LX1671-CLQTR	MICROSEMI	获取价格	1A SWITCHING CONTROLLER, 345kHz SWITCHING FREQ-MAX, PQCC38, 5 x 7 MM, PLASTIC, MLPQ-38
LX1671CLQ-TR	MICROSEMI	获取价格	Multiple Output LoadSHARE PWM
LX1671CPW	MICROSEMI	获取价格	Multiple Output LoadSHARE PWM
LX1671-CPW	MICROSEMI	获取价格	1A SWITCHING CONTROLLER, 345kHz SWITCHING FREQ-MAX, PDSO38, PLASTIC, TSSOP-38
LX1671-CPWTR	MICROSEMI	获取价格	1A SWITCHING CONTROLLER, 345kHz SWITCHING FREQ-MAX, PDSO38, PLASTIC, TSSOP-38
LX1671CPW-TR	MICROSEMI	获取价格	Multiple Output LoadSHARE PWM

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