Datasheet > RT9245BPC

RT9245BPC

更新时间： 2024-09-24 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
23页	424K
描述
Multi-Phase PWM Controller for K8 CPU Core Power Supply

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RT9245BPC 数据手册

RT9245B

Multi-Phase PWM Controller for K8 CPU Core Power Supply

General Description

Features

l Multi-Phase Power Conversion with Automatic

Phase Selection

RT9245B is a multi-phase buck DC/DC controller

integrated with all control functions forAMD K8 CPU. The

RT9245B 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.

l 6-bit AMD K8 M2 DAC Output with Active Droop

Compensation for Fast Load Transient

l Smooth V_CORETransition at VID Jump

l Power Stage Thermal Balance by DCR Current

Sense

l Hiccup Mode Over-Current Protection

l Programmable Switching Frequency (50kHz to

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

Start

RT9245B implements both voltage and current loops to

achieve good regulation, response and power stage

thermal balance.

l High Ripple Frequency Times Channel Number

l 28-TSSOP Package

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

RT9245B applies theDCR sensing technology newly. The

RT9245B extracts the ESR of output inductor as sense

component to deliver a precise load line regulation and

good thermal balance for next generation processor

application.

Applications

l AMD K8 Processors Voltage Regulator

l Low Output Voltage, High CurrentDC-DC Converters

l 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 RT9245B supports AMD K8

6-bit VID, precise offset value & smooth V_COREtransient

at V_IDjump. The ICmonitors the V_COREvoltage forPGOOD

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. The RT9245B comes to a small footprint

packageTSSOP-28.

Pin Configurations

(TOP VIEW)

VID4

VID3

VID2

VID1

VID0

VID5

SGND

VCC

PWM1

PWM2

PWM3

PWM4

CSP4

CSP2

CSP3

CSP1

GND

COMP

PGOOD

DVD

VOSS

ADJ

IOUT

CSN

IMAX

Ordering Information

RT9245B

TSSOP-28

Package Type

C : TSSOP-28

Note :

RichTek Pb-free and Green products are :

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

}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.

DS9245B-02 March 2007

www.richtek.com

12 3 4 5 6 7...23

中文翻译

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与RT9245BPC相关器件

型号	品牌	获取价格	描述	数据表
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
RT9246A	RICHTEK	获取价格	Multi-Phase PWM Controller for CPU Core Power Supply
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

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