Datasheet > ISL6557CB-T

ISL6557CB-T

更新时间： 2024-11-29 22:22:35

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
17页	527K
描述
Multi-Phase PWM Controller for Core-Voltage Regulation

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ISL6557CB-T 数据手册

ISL6557

Data Sheet

Augus t 2003

FN9059.2

Multi-Phas e PWM Controller for

Core-Voltage Regulation

Features

• Multi-Phase Power Conversion

• Active Channel Current Balancing

The ISL6557 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-supply 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 ISL6557 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

1.5MHz 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

- 1.100V to 1.850V in 25mV Steps

• Programmable Power-On Bias Level

• Programmable Droop Voltage

• Fast Transient Recovery Time

• Precision Enable Threshold

• Overcurrent Protection

New features on the ISL6557 include Dynamic-VID™

technology allowing seamless on-the-fly VID changes with

no need for any additional external components. When the

ISL6557 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)

Ordering Information

PART NUMBER TEMP. ( C)

PACKAGE

PKG. DWG. #

ISL6557CB

0 to 70

24-Ld SOIC M24.3

ISL6557CB-T

24-Ld SOIC Tape and Reel

Like other Intersil multiphase controllers, the ISL6557 uses

cost and space-saving r

sensing for channel current

DS(ON)

Pinout

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.

ISL6557 24 PIN (SOIC)

TOP VIEW

VID4

VID3

VCC

VID2

PGOOD

PWM4

ISEN4

ISEN1

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.

COMP

IOUT

VDIFF

VSEN

RGND

GND

17 PWM1

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 registered 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.

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与ISL6557CB-T相关器件

型号	品牌	获取价格	描述	数据表
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
ISL6558CRZ	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin
ISL6558CRZA	INTERSIL	获取价格	Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positionin

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