ISL6532B 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

比赛名单

ISL6532B

ACPI Regulator/Controller for Dual Channel DDR Memory Systems

Renesas Electronics 

DATASHEET

ISL6532B

ACPI Regulator/Controller for Dual Channel DDR Memory Systems

FN9120

Rev 3.00

Jul 2004

The ISL6532B 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 VDDQ with high current during

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

Run mode, a fully integrated sink-source regulator generates

an accurate (VDDQ/2) high current VTT voltage without the

need for a negative supply. A buffered version of the VDDQ/2

reference is provided as VREF.

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 2% over line, load, and

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 VDDQ into regulation

in 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 VTT and VDDQ standby

regulators. Thermal shutdown is integrated.

Pinout

ISL6532B (QFN)

TOP VIEW

20 19 18 17 16

5VSBY 1

GND 2

VTT 3

VTT 4

VDDQ 5

15 NCH

14 PGOOD

13 GND

12 COMP

11 FB

6 7 8 9 10

Features

• Generates 2 Regulated Voltages

- Synchronous Buck PWM Controller with Standby LDO

- 3A Integrated Sink/Source Linear Regulator with

Accurate VDDQ/2 Divider Reference

- Glitch-free Transitions During State Changes

• ACPI Compliant Sleep State Control

• Integrated VREF Buffer

• PWM Controller Drives Low Cost N-Channel MOSFETs

• 250kHz Constant Frequency Operation

• Tight Output Voltage Regulation

- Both Outputs: 2% Over Temperature

• 5V or 3.3V Down Conversion

• Fully-Adjustable Outputs with Wide Voltage Range: Down

to 0.8V supports DDR and DDR2 Specifications

• Simple Single-Loop Voltage-Mode PWM Control Design

• Fast PWM Converter Transient Response

• Over Current Protection on VTT and Under/Over-Voltage

Monitoring of Both Outputs

• Integrated Thermal Shutdown Protection

• 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

• Pb-free available

Applications

• Single and Dual Channel DDR Memory Power Systems in

ACPI compliant PCs

• Graphics cards - GPU and memory supplies

• ASIC power supplies

• Embedded processor and I/O supplies

• DSP supplies

Ordering Information

TEMP. RANGE

PART NUMBER

(oC)

PACKAGE PKG. DWG. #

ISL6532BCR

0 to 70 20 Ld 6x6 QFN L20.6x6

ISL6532BCRZ

(See Note)

0 to 70

20 Ld 6x6 QFN

(Pb-free)

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

L20.6x6

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.

FN9120 Rev 3.00

Jul 2004

Page 1 of 15

Share Link: