Datasheet > ISL6531CR

ISL6531CR

更新时间： 2024-11-29 22:57:23

品牌	Logo	应用领域
英特矽尔 - INTERSIL		开关动态存储器双倍数据速率控制器
页数	文件大小	规格书
17页	459K
描述
Dual 5V Synchronous Buck Pulse-Width Modulator (PWM) Controller for DDRAM Memory VDDQ and VTT Termination

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ISL6531CR 数据手册

ISL6531

Data Sheet

August 11, 2005

FN9053.2

Dual 5V Synchronous Buck Pulse-Width

Modulator (PWM) Controller for DDRAM

Features

• Provides V

channel DDRAM memory systems

, V

, and V voltages for one- and two-

DDQ REF

Memory V

and V Termination

DDQ

The ISL6531 provides complete control and protection for

dual DC-DC converters optimized for high-performance

DDRAM memory applications. It is designed to drive low

cost N-channel MOSFETs in synchronous-rectified buck

• Excellent voltage regulation

- V

= 2.5V ±2% over full operating range

DDQ

±1% over full operating range

⋅ V

REF

DDQ

- V = V

± 30mV

REF

topology to efficiently generate 2.5V V

for powering

DDQ

for DDRAM differential signalling,

• Supports ‘S3’ sleep mode

DDRAM memory, V

REF

and V for signal termination. The ISL6531 integrates all of

- V is held at

via a low power window

DDQ

⋅ V

regulator to minimize wake-up time

the control, output adjustment, monitoring and protection

functions into a single package.

• Fast transient response

- Full 0% to 100% duty ratio

The V

DDQ

output of the converter is maintained at 2.5V

through an integrated precision voltage reference. The V

output is precisely regulated to 1/2 the memory power

supply, with a maximum tolerance of ±1% over temperature

REF

• Operates from +5V Input

• V regulator internally compensated

and line voltage variations. V accurately tracks V

• Overcurrent fault monitor on VDD

TT REF

During V2_SD sleep mode, the V output is maintained by

a low power window regulator.

- Does not require extra current sensing element

- Uses MOSFET’s r

DS(ON)

The ISL6531 provides simple, single feedback loop, voltage-

• Drives inexpensive N-Channel MOSFETs

mode control with fast transient response for the V

DDQ

• Small converter size

regulator. The V regulator features internal compensation

- 300kHz fixed frequency oscillator

that eases the design. It includes two phase-locked 300kHz

triangle-wave oscillators which are displaced 90 to minimize

• 24 Lead, SOIC or 32 Lead, 5mm×5mm QFN

interference between the two PWM regulators. The

regulators feature error amplifiers with a 15MHz gain-

bandwidth product and 6V/µs slew rate which enables high

converter bandwidth for fast transient performance. The

resulting PWM duty ratio ranges from 0% to 100%.

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• V

, V , and VREF regulation for DDRAM memory

DDQ TT

systems

The ISL6531 protects against overcurrent conditions by

inhibiting PWM operation. The ISL6531 monitors the current

- Main memory in AMD® Athlon™ and K8™, Pentium®

III, Pentium IV, Transmeta, PowerPC™, AlphaPC™, and

UltraSparc® based computer systems

in the V

regulator by using the r

of the upper

DDQ

DS(ON)

MOSFET which eliminates the need for a current sensing

resistor.

• High-power tracking DC-DC regulators

Ordering Information

TEMP

PART NUMBER RANGE( C)

PACKAGE

PKG. DWG. #

M24.3

ISL6531CB

0 to 70

24 Lead SOIC

ISL6531CBZ

(See Note)

24 Lead SOIC

(Pb-free)

M24.3

ISL6531CR

0 to 70

32 Lead 5x5 QFN L32.5x5

ISL6530/31EVAL1 Evaluation Board

Add “-T” suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material

sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are RoHS compliant and compatible with both SnPb

and Pb-free soldering operations. Intersil Pb-free products are MSL classified

at Pb-free peak reflow temperatures that meet or exceed the Pb-free

requirements of IPC/JEDEC J STD-020.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

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与ISL6531CR相关器件

型号	品牌	获取价格	描述	数据表
ISL6531CR-T	INTERSIL	获取价格	Dual 5V Synchronous Buck Pulse-Width Modulator (PWM) Controller for DDRAM Memory VDDQ and
ISL6531EVAL1	INTERSIL	获取价格	Dual 5V Synchronous Buck Pulse-Width Modulator (PWM) Controller for DDRAM Memory VDDQ and
ISL6532	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems
ISL6532A	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems
ISL6532ACR	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems
ISL6532ACR-T	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems
ISL6532ACR-TK	RENESAS	获取价格	3A SWITCHING CONTROLLER, 280kHz SWITCHING FREQ-MAX, PQCC28, 6 X 6 MM, PLASTIC, MO-220VJJC,
ISL6532ACRZ	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems
ISL6532ACRZ-T	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems
ISL6532AIRZ	INTERSIL	获取价格	ACPI Regulator/Controller for Dual Channel DDR Memory Systems

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