Datasheet > RT8820A

RT8820A

更新时间： 2024-04-09 19:03:02

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
21页	355K
描述
Dual-Phase PWM Controller with PWM-VID Reference

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RT8820A 数据手册

RT8820A

Dual-Phase PWM Controller with PWM-VID Reference

General Description

Features

^Dual-Phase PWM Controller

The RT8820A is a 2/1 phase synchronous Buck PWM

controller which is optimized for high performance graphic

microprocessor and computer applications. The IC

integrates a Constant-On-Time (COT) PWM controller, two

MOSFET drivers with internal bootstrap diodes, as well

as channel current balance and protection functions

including Over-Voltage Protection (OVP), Under-Voltage

Protection (UVP), current limit, and thermal shutdown into

the WQFN-20L 3x3 package.

^Power State Indicator

^1P-CCM/2P-CCM/1P-DEM/2P-DEM

^Two Embedded MOSFET Drivers and Embedded

Switching Boot Diode

^Support 1.8V PWM-VID Interface

^External Reference Input Control

^PWM-VID Dynamic Voltage Control

^Dynamic Phase Number Control

^Lossless R_DS(ON)Current Sensing for Current Balance

^Internal/External Soft-Start

The RT8820A adopts R_DS(ON)current sensing technique.

Current limit is accomplished through continuous inductor-

current-sense, while R_DS(ON)current sensing is used for

accurate channel current balance. Using the method of

current sampling utilizes the best advantages of each

technique.

^Adjustable Current Limit Threshold

 Adjustable Switching Frequency

 UVP/OVP Protection

 Shoot Through Protection and Short Pulse Free

Technology

The RT8820Afeatures external reference input and PWM-

VIDdynamic output voltage control, in which the feedback

voltage is regulated and tracks external input reference

voltage. Other features include adjustable switching

frequency, dynamic phase number control, internal soft-

start, power good indicator, and enable functions.

 Support an Ultra-Low Output Voltage as Standby

Voltage

 Thermal Shutdown

 Power Good Indicator (EN to PG high = 500μs)

Applications

 CPU/GPU Core Power Supply

 Desktop PC Memory, VTT Power

 Chipset/RAM Power Supply

Ordering Information

RT8820A

Package Type

QW : WQFN-20L 3x3 (W-Type)

 GenericDC-DC Power Regulator

Lead Plating System

G : Green (Halogen Free and Pb Free)

Pin Configuration

(TOP VIEW)

Note :

Richtek 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.

20 19 18 17 16

BOOT1

UGATE1

BOOT2

UGATE2

PGOOD

OCSET/SS

VSNS

GND

PSI

VID

Marking Information

9 10

KP= : Product Code

YMDNN : Date Code

KP=YM

DNN

WQFN-20L 3x3

is a registered trademark of Richtek Technology Corporation.

DS8820A-01 February 2020

www.richtek.com

12 3 4 5 6 7...21

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