Datasheet > RT9246A

RT9246A

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
16页	282K
描述
Multi-Phase PWM Controller for CPU Core Power Supply

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RT9246A 数据手册

RT9246A

Multi-Phase PWM Controller for CPU Core Power Supply

General Description

Features

z Multi-Phase Power Conversion with Automatic

The RT9246A is a multi-phase buck DC/DC controller

integrated with all control functions for GHz CPU VRM.

The RT9246A 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 Inductor DCR

Current Sense

z Hiccup Mode Over-Current Protection

z Programmable Switching Frequency (50kHz to

400kHz per Phase), Under-Voltage Lockout and

Soft-Start

RT9246Acontrols both voltage and current loops to achieve

good regulation, response & power stage thermal balance.

Precise current loop using Inductor DCR 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

The DAC output of RT9246A 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

VCC

PWM1

PWM2

PWM3

ISP1

ISP2

ISP3

FBRTN

COMP

PGOOD

DVD

VOSS

Ordering Information

GND

RT9246A

ADJ

IOUT

ICOMMON

IMAX

Package Type

C : TSSOP-28

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.

DS9246A-04 March 2007

www.richtek.com

12 3 4 5 6 7...16

中文翻译

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与RT9246A相关器件

型号	品牌	获取价格	描述	数据表
RT9246AGC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9246APC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9246GC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9246PC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
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

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