Datasheet > RT9645

RT9645

更新时间： 2024-09-29 04:07:19

品牌	Logo	应用领域
立锜 - RICHTEK		稳压器
页数	文件大小	规格书
13页	390K
描述
5 Channels ACPI Regulator

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中文翻译

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数据手册

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RT9645 数据手册

Preliminary

RT9645

5 Channels ACPI Regulator

General Description

Features

^zIntegrated 5 Channels Power Regulator

^zDC/DC Buck PWM Regulator (Driver Included)

^zDC/DC Buck PWM Controller

The RT9645 is a combo regulator which is compliant to

ACPI specification for desktop/server power management

and system application. The part features one switching

regulator forDDR memory VDDQ power; a second PWM

controller for GMCH core power, a LDO controller for

FSB_ VTT termination, a LDO controller for 5VSB to 3VSB

conversion; and a dual power control 5VDL for S0 and S3

system power.

^zLinear Regulator Controller for FSB_VTT Power

^z3.3VSB Linear Regulator Controller with 40mA

Output Capability

^z5VDL Switch Control

^zConform to ACPI Specification, Supporting Power

Management at S0, S3, and S5 State

^z300kHz Fixed Frequency Oscillator

^zLow-Side R_DS(ON)Current Sensing for Precision

Over-Current Detection

The part is generally operated to conform to ACPI

specification. In S3 mode, only VDDQ and 3.3VSB

regulators remain on while the FSB_ VTT regulator is off.

In the transition from S3 to S0, an internal SS capacitor is

attached for linear regulators to control its slew rate

respectively to avoid inrush current induced.

z Thermal Shutdown

z Small 24-Lead VQFN Package

z RoHS Compliant and 100% Lead (Pb)-Free

RT9645 supports both Intel VR11 and AMD K8 platform.

There is extra control pin VTT_EN to enable FSB_VTT

regulator at AMD K8 mode. This part also implements

PWM1 (V_DDQ) enabled by release COMP1 at AMD K8

application. This part is assemblyed in the tiny

VQFN-24L 4x4 package.

Applications

z Desktop System Power

z Server System Power

Pin Configurations

Ordering Information

(TOP VIEW)

RT9645

Package Type

QV : VQFN-24L 4x4

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

24 23 22 21 20 19

SB3V_DRV

VDD

VTT_DRV

VTT_SEN

VTT_EN

ISNS2

Note :

PWM2

PGND

Richtek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

SS2/EN2

COMP2

FB2

FB1

COMP1

10 11 12

`Suitable for use in SnPb or Pb-free soldering processes.

`100% matte tin (Sn) plating.

VQFN-24L 4x4

DS9645-00 August 2007

www.richtek.com

12 3 4 5 6 7...13

中文翻译

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