Datasheet > RT9244PS

RT9244PS

更新时间： 2025-08-19 04:32:55

品牌	Logo	应用领域
立锜 - RICHTEK		多相元件控制器
页数	文件大小	规格书
15页	383K
描述
Multi-Phase PWM Controller for CPU Core Power Supply

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RT9244PS 数据手册

RT9244

Multi-Phase PWM Controller for CPU Core Power Supply

General Description

Features

^zMulti-Phase Power Conversion with Automatic

The RT9244 is a multi-phase buck DC/DC controller

integrated with all control functions for GHz CPU VRM.

The RT9244 controls 2, 3 or 4 buck switching stages

operating in interleaved phase set automatically. The multi-

phase architecture provides high output current while

maintaining low power dissipation on power devices and

low stress on input and output capacitors. The high

equivalent operating frequency also reduces the component

dimension and the output voltage ripple in load transient.

Phase Selection

^zK8 DAC Output with Active Droop Compens-ation

for Fast Load Transient

^zSmooth V_CORETransition at VID Jump

^zPower Stage Thermal Balance by R_DS(ON)Current

Sense

^zHiccup Mode Over-Current Protection

^zProgrammable Switching Frequency (50kHz to

400kHz per Phase), Under-Voltage Lockout and

Soft-Start

RT9244 controls both voltage and current loops to achieve

good regulation, response & power stage thermal balance.

Precise current loop using R_DS(ON)as sense component

builds precise load line for strict VRM DC & transient

specification and also ensures thermal balance of different

power stages. The settings of current sense, droop tuning,

V_COREinitial offset and over current protection are

independent to compensation circuit of voltage loop. The

feature greatly facilitates the flexibility of CPU power supply

design and tuning.

^zHigh Ripple Frequency Times Channel Number

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

Applications

z AMD Athlon^TM64 and Opteron^TMProcessors Voltage

Regulator

z Low Output Voltage, High CurrentDC-DC Converters

z Voltage Regulator Modules

TheDAC output of RT9244 supports K8 CPU by 5-bit VID

input, precise initial value & smooth V_COREtransient at VID

jump. The IC monitors the V_COREvoltage for PGOOD and

over-voltage protection. Soft-start, over-current protection

and programmable under-voltage lockout are also provided

to assure the safety of microprocessor and power system.

Pin Configurations

(TOP VIEW)

OVP

DVD

PGOOD

PWM4

VID4

VID3

VID2

VID1

VID0

VOSS

COMP

ISP4

Ordering Information

RT9244

ISP1

PWM1

PWM2

Package Type

S : SOP-32

GND

ISP2

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

ADJ

ISP3

PWM3

VCC

SS2

VDIF

VSEN

SGND

ISN4

ISN3

ISN1

ISN2

Note :

RichTek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

SOP-32

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

`100%matte tin (Sn) plating.

DS9244-06 March 2007

www.richtek.com

12 3 4 5 6 7...15

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与RT9244PS相关器件

型号	品牌	获取价格	描述	数据表
RT9245	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245A	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245AGC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245APC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245B	RICHTEK	获取价格	Multi-Phase PWM Controller for K8 CPU Core Power Supply
RT9245BGC	RICHTEK	获取价格	Multi-Phase PWM Controller for K8 CPU Core Power Supply
RT9245BPC	RICHTEK	获取价格	Multi-Phase PWM Controller for K8 CPU Core Power Supply
RT9245C	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245CGC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245CPC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply

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