Datasheet > RT9245AGC

RT9245AGC

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
25页	544K
描述
Multi-Phase PWM Controller for CPU Core Power Supply

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RT9245AGC 数据手册

RT9245A

Multi-Phase PWM Controller for CPU Core Power Supply

General Description

Features

^zMulti-Phase Power Conversion with Automatic

RT9245A is a multi-phase buck DC/DC controller

integrated with all control functions for AMD K8 CPU or

Intel^®GHz CPU which is VRD10.x-compliant. The

RT9245A could be operated with 2, 3 or 4 buck switching

stages operating in interleaved phase set automatically.

The multiphase 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

^z6-bits VRD10.x or 5-bit K8 DAC Output with Active

Droop Compensation for Fast Load Transient

^zSmooth V_CORETransition at VID Jump

^zPower Stage Thermal Balance by DCR Current

Sense

^zHiccup Mode Over-Current Protection

^zProgrammable Switching Frequency (50kHz to

400kHz per Phase), Under-Voltage Lockout and Soft-

Start

^zHigh Ripple Frequency Times Channel Number

z 28-TSSOP Package

RT9245A implements both voltage and current loops to

achieve good regulation, response and power stage

thermal balance.

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

RT9245Aapplies theDCR sensing technology newly. The

RT9245A extracts the DCR of output inductor as sense

component to deliver a precise load line regulation and

good thermal balance for next generation processor

application.

Applications

z Intel^®Processors Voltage Regulator : VRD10.x andAMD

z Low Output Voltage, High CurrentDC-DC Converters

z Voltage Regulator Modules

Current sense setting, droop tuning, V_COREinitial offset

and over current protection are independent on

compensation circuit of voltage loop. The feature greatly

facilitates the flexibility of CPU power supply design and

tuning. The DAC output of RT9245A supports AMD K8

5-bit VIDand Intel^®VRD10.x with 6-bit VIDinput, precise

offset value & smooth V_COREtransient at VID jump. The

IC monitors the V_COREvoltage for PGOODand 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.

The RT9245A comes to a small footprint package

TSSOP-28.

Pin Configurations

(TOP VIEW)

VID4

VID3

VID2

VCC

PWM1

PWM2

PWM3

PWM4

CSP4

CSP2

CSP3

CSP1

GND

VID1

VID0

VID125/VIDSEL

SGND

COMP

PGOOD

DVD

VOSS

ADJ

IOUT

CSN

IMAX

TSSOP-28

Ordering Information

RT9245A

Note :

RichTek Pb-free and Green products are :

Package Type

C : TSSOP-28

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

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

`100% matte tin (Sn) plating.

DS9245A-05 March 2007

www.richtek.com

12 3 4 5 6 7...25

中文翻译

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与RT9245AGC相关器件

型号	品牌	获取价格	描述	数据表
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
RT9245GC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9245PC	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
RT9246	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply

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