Datasheet > RT8862

RT8862

更新时间： 2024-09-23 12:23:39

品牌	Logo	应用领域
立锜 - RICHTEK		驱动控制器
页数	文件大小	规格书
29页	479K
描述
Advanced 4/3/2/1-Phase PWM Controller with Embedded Drivers for CPU Core Power Supply

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RT8862 数据手册

RT8862

Advanced 4/3/2/1-Phase PWM Controller with Embedded

Drivers for CPU Core Power Supply

General Description

Features

^zSupport Dynamic Phase Control

The RT8862 is an advanced 4/3/2/1-phase synchronous

buck controller with 2 integrated MOSFET drivers for Intel

VR11/VR10 andAMDK8/K8_M2 CPUs power application.

RT8862 adopts state-of-the-art dynamic phase control

capability. That achieves high efficiency over wide load

range. It uses differential inductor DCR current sense to

achieve phase current balance and active voltage

positioning. Other features include adjustable operating

frequency, adjustable soft start, power good indication,

external error-amp compensation, over voltage protection,

over current protection and enable/shutdown for various

application. RT8862 comes to a small footprint with

WQFN-48L 7x7 package.

^z12V Power Supply Voltage

^z4/3/2/1-Phase Power Conversion

^z2 Embedded MOSFET Drivers

^zInternal Regulated 5V Output

^zVID table for INTEL VR11.1/VR10.x and AMD K8/

K8_M2 CPUs

^zContinuous Differential Inductor DCR Current Sense

^zAdjustable Soft Start

^zAdjustable Frequency (300kHz typ.)

^zPower Good Indication

z Adjustable Over Current Protection

z Over Voltage Protection

z VRHOT Sensing with External Thermistor

z IMON Output Current Indication

z Power State Indicator (PSI)

Ordering Information

RT8862

z Small 48-Lead WQFN Package

z RoHS Compliant and Halogen Free

Package Type

QW : WQFN-48L 7x7 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Pin Configurations

(TOP VIEW)

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

48 47 46 45 44 43 42 41 40 39 38 37

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

FBRTN

QR1

QR2

SS/EN

COMP

36 PWRGD

35 BOOT1

34 UGATE1

Applications

z Desktop CPU Core Power

PHASE1

LGATE1

31 VCC12

30 LGATE2

29 PHASE2

z Low Voltage, High CurrentDC/DC Converter

GND

OFS

ADJ

UGATE2

BOOT2

PWM3

IMAX

IMAXPSI 11

IMONFB

PWM4

13 14 15 16 17 18 19 20 21 22 23 24

WQFN-48L 7x7

DS8862-01 April 2011

www.richtek.com

12 3 4 5 6 7...29

中文翻译

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