Datasheet > RT9245PC

RT9245PC

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
22页	421K
描述
Multi-Phase PWM Controller for CPU Core Power Supply

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RT9245PC 数据手册

RT9245

Multi-Phase PWM Controller for CPU Core Power Supply

General Description

Features

^zMulti-Phase Power Conversion with Automatic

RT9245 is a multi-phase buckDC/DC controller integrated

with all control functions for Intel^®GHz CPU which is

VRD10.X-compliant. The RT9245 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 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

RT9245 implements both voltage and current loops to

achieve good regulation, response and power stage

thermal balance.

^zHigh Ripple Frequency Times Channel Number

z 28-TSSOP Package

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

RT9245 applies the DCR sensing technology newly. The

RT9245 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

z Intel^®Processors Voltage Regulator : VRD10.x

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. TheDAC output of RT9245 supports VRD10.x with

6-bit V_IDinput, precise offset value & smooth V_CORE

transient at V_IDjump. 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 RT9245 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

ADJ

CSN

IMAX

VID1

VID0

VID125

SGND

COMP

PGOOD

DVD

VOSS

Ordering Information

RT9245

TSSOP-28

Note :

RichTek Pb-free and Green products are :

Package Type

C : TSSOP-28

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.

DS9245-06 March 2007

www.richtek.com

12 3 4 5 6 7...22

中文翻译

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与RT9245PC相关器件

型号	品牌	获取价格	描述	数据表
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
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

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