ISL6532 Intersil Corporation, ISL6532 Datasheet

ISL6532

Manufacturer Part Number

ISL6532

Description

ACPI Regulator/Controller for Dual Channel DDR Memory Systems

Manufacturer

Intersil Corporation

Datasheet

1.ISL6532.pdf (14 pages)

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Download datasheet (363Kb)

ACPI Regulator/Controller for

Dual Channel DDR Memory Systems

The ISL6532 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

and integrated LDO to supply V

S0/S1 states and standby current during S3 state. During

Run mode, a fully integrated sink-source regulator generates

an accurate (V

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

reference is provided as V

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. Both the switching

regulator and integrated standby LDO provide a maximum

static regulation tolerance of

temperature ranges. The output is user-adjustable by means

of external resistors down to 0.8V.

Switching the memory core output between the PWM

regulator and the standby LDO during state transitions is

accomplished smoothly via the internal ACPI control

circuitry. The NCH signal provides synchronized switching of

a backfeed blocking switch during the transitions eliminating

the need to route 5V Dual to the memory supply.

An integrated soft-start feature brings V

a controlled manner when returning to S0/S1 state from

S4/S5 or mechanical off states. During S0 the PGOOD signal

indicates that all supplies are within spec and operational.

Each output is monitored for under and over-voltage events.

Current limiting is included on the V

regulators. Thermal shutdown is integrated.

Pinout

5VSBY

VDDQ

GND

VTT

DDQ

ISL6532 (QFN) TOP VIEW

/2) high current V

REF

GND

2% over line, load, and

DDQ

Data Sheet

with high current during

DDQ

and V

voltage without the

into regulation in

DDQ

NCH

PGOOD

GND

COMP

standby

DDQ

1-888-INTERSIL or 321-724-7143

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

Features

• Generates 2 Regulated Voltages

• ACPI Compliant Sleep State Control

• Integrated V

• PWM Controller Drives Low Cost N-Channel MOSFETs

• 250kHz Constant Frequency Operation

• Tight Output Voltage Regulation

• 5V or 3.3V Down Conversion

• Fully-Adjustable Outputs with Wide Voltage Range: Down

• Simple Single-Loop Voltage-Mode PWM Control Design

• Fast PWM Converter Transient Response

• Over Current Protection and Under/Over-Voltage

• Integrated Thermal Shutdown Protection

• QFN Package Option

Applications

• Single and Dual Channel DDR Memory Power Systems in

• Graphics cards - GPU and memory supplies

• ASIC power supplies

• Embedded processor and I/O supplies

• DSP supplies

Ordering Information

PART NUMBER

ISL6532CR

- Synchronous Buck PWM Controller with Standby LDO

- 3A Integrated Sink/Source Linear Regulator with

- Glitch-free Transitions During State Changes

- Both Outputs:

to 0.8V supports DDR and DDR2 Specifications

Monitoring of Both Outputs

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

- QFN Near Chip Scale Package Footprint; Improves

ACPI compliant PCs

Accurate V

Flat No Leads - Product Outline

PCB Efficiency, Thinner in Profile

December 2003

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

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

REF

DDQ

TEMP. RANGE

Buffer

/2 Divider Reference.

2% Over Temperature

0 to 70

(

20 Ld 6x6 QFN

PACKAGE

ISL6532

FN9112.2

L20.6x6

DWG. #

PKG.

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