PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15

廬

ISL6537

Data Sheet

February 8, 2005

FN9142.4

ACPI Regulator/Controller for

Dual Channel DDR Memory Systems

The ISL6537 provides a complete ACPI compliant power

solution for up to 4 DIMM dual channel DDR/DDR2 Memory

systems. Included are both a synchronous buck controller to

supply V

DDQ

during S0/S1 and S3 states. During S0/S1

state, a fully integrated sink-source regulator generates an

accurate (V

DDQ

/2) high current V

TT

voltage without the

need for a negative supply. A buffered version of the V

DDQ

/2

reference is provided as V

REF

. Two LDO controllers are also

integrated for the GMCH core voltage regulation and for the

GMCH and CPU V

TT

termination voltage regulation.

The switching PWM controller drives two N-Channel

MOSFETs in a synchronous-rectified buck converter

topology. The synchronous buck converter uses voltage-

mode control with fast transient response. The switching

regulator provides a maximum static regulation tolerance of

鹵

2% over line, load, and temperature ranges. The output is

user-adjustable by means of external resistors down to 0.8V.

An integrated soft-start feature brings all outputs into

regulation in a controlled manner when returning to S0/S1

state from any sleep state. During S0 the VIDPGD signal

indicates that the GMCH and CPU V

TT

termination voltage

is within spec and operational.

Each output is monitored for undervoltage events. The

switching regulator also has overvoltage and over current

protection. Thermal shutdown is integrated.

Features

鈥?Generates 4 Regulated Voltages

- Synchronous Buck PWM Controller for DDR V

DDQ

- 3A Integrated Sink/Source Linear Regulator with

Accurate VDDQ/2 Divider Reference for DDR V

TT

- LDO Regulator for GMCH Core

- LDO Regulator for CPU/GMCH V

TT

Termination

鈥?ACPI compliant sleep state control

鈥?Glitch-free Transitions During State Changes

鈥?Integrated V

REF

Buffer

鈥?PWM Controller Drives Low Cost N-Channel MOSFETs

鈥?250kHz Constant Frequency Operation

鈥?Tight Output Voltage Regulation

- All Outputs:

鹵

2% Over Temperature

鈥?Fully-Adjustable Outputs with Wide Voltage Range: Down

to 0.8V supports DDR and DDR2 Specifications

鈥?Simple Single-Loop Voltage-Mode PWM Control Design

鈥?Fast PWM Converter Transient Response

鈥?Under and Over-voltage Monitoring on All Outputs

鈥?OCP on the Switching Regulator

鈥?Integrated Thermal Shutdown Protection

鈥?Pb-Free Available (RoHS Compliant)

Applications

鈥?Single and Dual Channel DDR Memory Power Systems in

ACPI compliant PCs

Pinout

LGATE

ISL6537 (6x6 QFN)

TOP VIEW

OCSET

PHASE

UGATE

BOOT

GND

S5#

鈥?Graphics cards - GPU and memory supplies

鈥?ASIC power supplies

鈥?Embedded processor and I/O supplies

21 DRIVE4

20 REFADJ4

19 DRIVE3

28

5VSBY

S3#

P12V

GND

DDR_VTT

DDR_VTT

VDDQ

1

2

3

4

5

6

7

8

VDDQ

27

26

25

24

23

22

鈥?DSP supplies

Ordering Information

PART NUMBER

ISL6537CR

ISL6537CRZ

(See Note)

TEMP. RANGE

(擄C)

0 to 70

0 to 70

PACKAGE

PKG.

DWG. #

GND

29

18 FB3

17 FB4

16 COMP

15 FB

28 Ld 6x6 QFN L28.6x6

28 Ld 6x6 QFN L28.6x6

(Pb-free)

*Add 鈥?T鈥?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 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 321-724-7143

|

Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright 漏 Intersil Americas Inc. 2004, 2005. All Rights Reserved

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

9

DDR_VTTSNS

10

DRIVE2

11

FB2

12

VIDPGD

13

VREF_OUT

14

VREF_IN

1

next

ISL6537 PDF文件相關(guān)型號(hào)

ISL6537相關(guān)型號(hào)PDF文件下載

• 型號(hào)
  版本
  描述
  廠商
  下載
• 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

您可能感興趣的PDF文件資料

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

熱門IC型號(hào)推薦

• IRFUC20
• IR3841MTRPBF
• IRF7401TRPBF
• IKW40N120T2
• IRF7210TRPBF
• IMD3A T108
• IRF7811ATRPBF
• IRF5210S
• ICE3BR2565JF
• IRS2092STRPBF
• IPP05CN10NG
• IRFR320TRPBF