ISL6561 Datasheet

PDF预览

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26

庐

ISL6561

Data Sheet

May 12, 2005

FN9098.5

Multi-Phase PWM Controller with

Precision r

DS(ON)

or DCR Differential

Current Sensing for VR10.X Application

The ISL6561 controls microprocessor core voltage regulation

by driving up to 4 synchronous-rectified buck channels in

parallel. Multi-phase buck converter architecture uses

interleaved timing to multiply channel ripple frequency and

reduce input and output ripple currents. Lower ripple results in

fewer components, lower component cost, reduced power

dissipation, and smaller implementation area.

Microprocessor loads can generate load transients with

extremely fast edge rates. The ISL6561 features a high

bandwidth control loop and ripple frequencies of >4MHz to

provide optimal response to the transients.

Today鈥檚 microprocessors require a tightly regulated output

voltage position versus load current (droop). The ISL6561

senses current by utilizing patented techniques to measure

the voltage across the on resistance, r

DS(ON)

, of the lower

MOSFETs or DCR of the output inductor during the lower

MOSFET conduction intervals. Current sensing provides the

needed signals for precision droop, channel-current

balancing, and overcurrent protection.

The accuracy of the current-sensing method is enhanced by

the ISL6561鈥檚 temperature compensation function. Droop

accuracy can be affected by increasing r

DS(ON)

or DCR with

elevated temperature. The ISL6561 uses an internal

temperature-sensing element to provide programmable

temperature compensation. Correctly applied, temperature

compensation can completely nullify the effect of r

DS(ON) or

DCR temperature sensitivity.

A unity gain, differential amplifier is provided for remote

voltage sensing. Any potential difference between remote

and local grounds can be completely eliminated using the

remote-sense amplifier. Eliminating ground differences

improves regulation and protection accuracy. The threshold-

sensitive enable input is available to accurately coordinate

the start up of the ISL6561 with any other voltage rail.

Dynamic-VID鈩?technology allows seamless on-the-fly VID

changes. The offset pin allows accurate voltage offset

settings that are independent of VID setting. The ISL6561

uses 5V bias and has a built-in shunt regulator to allow 12V

bias using only a small external limiting resistor.

Features

鈥?Precision Multi-Phase Core Voltage Regulation

- Differential Remote Voltage Sensing

-

卤0.5%

System Accuracy Over Life, Load, Line and

Temperature

- Adjustable Reference-Voltage Offset

鈥?Precision r

DS(ON)

or DCR Current Sensing

- Integrated Programmable Temperature Compensation

- Accurate Load-Line Programming

- Accurate Channel-Current Balancing

- Differential Current Sense

- Low-Cost, Lossless Current Sensing

鈥?Internal Shunt Regulator for 5V or 12V Biasing

鈥?Microprocessor Voltage Identification Input

- Dynamic VID鈩?technology

- 6-Bit VID Input

- 0.8375V to 1.600V in 12.5mV Steps

鈥?Threshold-Sensitive Enable Function for synchronizing

with driver POR

鈥?Overcurrent Protection

鈥?Overvoltage Protection

- No Additional External Components Needed

- OVP Pin to drive opitional Crowbar Device

鈥?2, 3, or 4 Phase Operation

鈥?Greater Than 1MHz Operation (> 4MHz Ripple)

鈥?Pb-free Available

(RoHS Compliant)

鈥?QFN Package Option

- QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad

Flat No Leads - Product Outline

- QFN Near Chip Scale Package Footprint; Improves

PCB Efficiency, Thinner in Profile

1

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.

Dynamic VID鈩?is a trademark of Intersil Americas Inc. Copyright 漏 Intersil Americas Inc. 2002-2005. All Rights Reserved.

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

next

ISL6561 PDF文件相关型号

ISL6561相关型号PDF文件下载

• 型号
  版本
  描述
  厂商
  下载
• ISL6111
  英文版
  Current Regulated PCI Hot Plug Power Switch Controller
  
  ISL6111
• ISL6112
  英文版
  Dual Slot PCI-Express Power Controller
  
  ISL6112
• ISL6113
  英文版
  Dual Slot PCI-E Hot Plug Controllers
  
  ISL6113
• ISL6115
  英文版
  Power Distribution Controllers
  
  ISL6115
• ISL6116
  英文版
  Power Distribution Controllers
  
  ISL6116
• ISL6117
  英文版
  Power Distribution Controllers
  
  ISL6117
• ISL6118
  英文版
  Dual Power Supply Controller
  
  ISL6118
• ISL6119
  英文版
  USB Dual Port Power Supply Controller
  
  ISL6119
• ISL6120
  英文版
  Power Distribution Controllers
  
  ISL6120
• ISL6121
  英文版
  Single Supply Integrated Current Limiting Controller
  
  ISL6121
• ISL6123
  英文版
  Power Sequencing Controllers
  
  ISL6123
• ISL6124
  英文版
  Power Sequencing Controllers
  
  ISL6124
• ISL6125
  英文版
  Power Sequencing Controllers
  
  ISL6125
• ISL6126
  英文版
  Power Sequencing Controllers
  
  ISL6126
• ISL6127
  英文版
  Power Sequencing Controllers
  
  ISL6127
• ISL6128
  英文版
  Power Sequencing Controllers
  
  ISL6128
• ISL6130
  英文版
  Power Sequencing Controllers
  
  ISL6130
• ISL6130
  英文版
  Power Sequencing Controllers
  INTERSIL [Inter...
  ISL6130
• ISL6131
  英文版
  Multiple Voltage Supervisory ICs
  
  ISL6131
• ISL6131
  英文版
  Multiple Voltage Supervisory ICs
  INTERSIL [...
  ISL6131

您可能感兴趣的PDF文件资料

• ISL62771HRTZ
• ISL6367CRZ
• ISL60002
• ISL6753AAZA
• ISL6754AAZA
• ISL6227CAZ
• ISL6236
• ISL6253HAZ
• ISL6277HRZ
• ISL6366CRZ
• ISL6504CB
• ISL6251AHRZ

热门IC型号推荐

• INA157UA
• IRF7324TRPBF
• IRF7207TRPBF
• IRFZ44NPBF
• IRS2003STRPBF
• IRF9953TRPBF
• IR2156
• IRFP260NPBF
• ISL88550AIRZ
• ISO7240CDWR
• IPB06N03LA
• ISO1H801G