Datasheet > RT9246PC

RT9246PC

更新时间： 2024-11-12 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
17页	382K
描述
Multi-Phase PWM Controller for CPU Core Power Supply

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RT9246PC 数据手册

RT9246

Multi-Phase PWM Controller for CPU Core Power Supply

General Description

Features

z Multi-Phase Power Conversion with Automatic

The RT9246 is a multi-phase buck DC/DC controller

integrated with all control functions for GHz CPU VRM.

The RT9246 controls 2 or 3 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

z K8 DAC Output with Active Droop Compensation

for Fast Load Transient

z Smooth V_CORETransition at VID Jump

z Power Stage Thermal Balance by R_DS(ON)Current

Sense

z Hiccup Mode Over-Current Protection

z Programmable Switching Frequency (50kHz to

400kHz per Phase), Under-Voltage Lockout and

Soft-Start

RT9246 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.

z High 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

Pin Configurations

TheDAC output of RT9246 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.

(TOP VIEW)

VID4

VID3

VID2

VID1

VID0

SS2

VCC

PWM1

PWM2

PWM3

ISN1

ISP1

ISP2

ISP3

SGND

COMP

PGOOD

DVD

VOSS

Ordering Information

ISN23

GND

RT9246

ADJ

Package Type

C : TSSOP-28

VDIF

VSEN

IMAX

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

TSSOP-28

Note :

RichTek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

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

`100% matte tin (Sn) plating.

DS9246-06 March 2007

www.richtek.com

12 3 4 5 6 7...17

中文翻译

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与RT9246PC相关器件

型号	品牌	获取价格	描述	数据表
RT9247	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9247GC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9247PC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9248	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9248A	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9248AGC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9248APC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9248GC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9248PC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9256	RICHTEK	获取价格	Actively Alternative Mode Two-Phase / Dual Switching PWM Controller

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