Datasheet > ISL6557ACBZ-T

ISL6557ACBZ-T

更新时间： 2024-11-29 22:28:23

品牌	Logo	应用领域
英特矽尔 - INTERSIL		开关光电二极管多相元件控制器
页数	文件大小	规格书
19页	535K
描述
Multi-Phase PWM Controller for Core-Voltage Regulation

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ISL6557ACBZ-T 数据手册

ISL6557A

Data Sheet

July 2004

FN9068.3

Multi-Phase PWM Controller for

Core-Voltage Regulation

Features

• Multi-Phase Power Conversion

• Active Channel Current Balancing

The ISL6557A provides core-voltage regulation by driving up

to four interleaved synchronous-rectified buck-converter

channels in parallel. Intersil multi-phase controllers together

with Intersil MOSFET drivers form the basis for the most

reliable power-suppply solutions available to power the latest

industry-leading microprocessors. Multi-phase buck

converter architecture uses interleaved timing to multiply

ripple frequency and reduce input and output ripple currents.

Lower ripple results in lower total component cost, reduced

dissipation, and smaller implementation area. Pre-

configured for 4-phase operation, the ISL6557A offers the

flexibility of selectable 2- or 3-phase operation. Simply

connect the unused PWM pins to VCC. The channel

switching frequency is adjustable in the range of 50kHz to

igMHz giving the designer the ultimate flexibility in managing

the balance between high-speed response and good

thermal management.

• Precision r

- Low Cost

Current Sensing

DS(ON)

- Lossless

• Precision CORE Voltage Regulation

- Differential Remote Voltage Sensing

- ±0.8% System Accuracy

• Microprocessor Voltage Identification Input

- Dynamic VID technology

- 5-Bit VID Input

- 0.800V to 1.550V in 25mV Steps

• Programmable Power-On Bias Level

• Programmable Droop Voltage

• Fast Transient Recovery Time

• Precision Enable Threshold

• Overcurrent Protection

New features on the ISL6557A include Dynamic-VID™

technology allowing seamless on-the-fly VID changes with

no need for any additional external components. When the

ISL6557A receives a new VID code, it incrementally steps

the output voltage to the new level. Dynamic VID changes

are fast and reliable with no output voltage overshoot or

undershoot. The RGND and VSEN pins provide inputs for

differential remote voltage sensing to improve regulation and

protection accuracy. A threshold-sensitive enable pin (EN)

can be used with an external resistor divider to optionally set

the power-on voltage level. This allows optional start-up

coordination with Intersil MOSFET drivers or any other

devices powered from a separate supply.

• 2-, 3-, or 4-Phase Operation

• High Ripple Frequency. Channel Frequency Times

Number Channels (100kHz to 6MHz)

• Pb-free available

Ordering Information

PART NUMBER

TEMP. ( C)

0 to 70

PACKAGE PKG. DWG. #

ISL6557ACB

24-Ld SOIC

M24.3

ISL6557ACBZ

(See Note)

0 to 70

24-Ld SOIC

(Pb-free)

*Add “-T” suffix to part number for tape and reel packaging.

NOTE: Intersil Pb-free products employ special Pb-free material sets; molding

compounds/die attach materials and 100% matte tin plate termination finish, which

is 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-020B.

Like other Intersil multiphase controllers, the ISL6557A uses

cost and space-saving r

sensing for channel current

DS(ON)

balance, dynamic voltage positioning, and overcurrent

protection. Channel current balancing is automatic and

accurate with the integrated current-balance control system.

Overcurrent protection can be tailored to any application with

no need for additional parts. The IOUT pin carries a signal

proportional to load current and can be optionally connected

to FB for accurate load-line regulation.

Pinout

ISL6557A 24 PIN (SOIC)

TOP VIEW

VID4

VID3

VCC

VID2

PGOOD

PWM4

VID1

VID0

An integrated DAC decodes the 5-bit logic signal present at

VID4-VID0 and provides an accurate reference for precision

voltage regulation. The high-bandwidth error amplifier,

differential remote-sensing amplifier, and accurate voltage

reference all work together to provide better than 0.8% total

system accuracy, and to enable the fastest transient

response available.

19 ISEN4

COMP

ISEN1

PWM1

IOUT

VDIFF

VSEN

RGND

GND

16 PWM2

ISEN2

ISEN3

PWM3

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

1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners. Dynamic VID™ is a trademark of Intersil Americas Inc.

12 3 4 5 6 7...19

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ISL6557ACBZ-T 替代型号

型号	品牌	替代类型	描述	数据表
ISL6557ACBZ	INTERSIL	完全替代	Multi-Phase PWM Controller for Core-Voltage Regulation
ISL6557ACB	INTERSIL	完全替代	Multi-Phase PWM Controller for Core-Voltage Regulation
ISL6557ACB-T	INTERSIL	完全替代	Multi-Phase PWM Controller for Core-Voltage Regulation

与ISL6557ACBZ-T相关器件

型号	品牌	获取价格	描述	数据表
ISL6557CB	INTERSIL	获取价格	Multi-Phase PWM Controller for Core-Voltage Regulation
ISL6557CB-T	INTERSIL	获取价格	Multi-Phase PWM Controller for Core-Voltage Regulation
ISL6558	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CB	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CB-T	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CBZ	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CBZA	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CBZA-T	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CR	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CR-T	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin

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