Datasheet > BuckCont> RT8208BGQW

RT8208BGQW

更新时间： 2024-11-12 12:28:35

品牌	Logo	应用领域
立锜 - RICHTEK		电阻器
页数	文件大小	规格书
18页	350K
描述
Resistor Programmable Output Voltage from 0.75V to 3.3V with Integrated Transition Support

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RT8208BGQW 数据手册

RT8208A/B

Programmable Output Voltage Single Synchronous

Buck Controller

General Description

Features

z Ultra-High Efficiency

The RT8208A/B is a constant-on-time PWM controller

which provides four resistor programmable DC output

voltages by controlling the G0 and G1 digital input. The

output voltage is programmable from 0.75V to 3.3V. The

RT8208A/B offers the lowest total solution cost in systems

where need output voltage slewing. The RT8208A/B

provides an automatic masking power good output during

output voltage transition.

z Resistor Programmable Output Voltage from 0.75V

to 3.3V with Integrated Transition Support

z Quick Load Step Response within 100ns

z 1% V_FBAccuracy over Line and Load

z 4.5V to 26V Battery Input Range

z Resistor Programmable Frequency

z Integrated Bootstrap Switch

z Resistor Programmable Positive Current Limit by

Low Side R_DS(ON)Sense (Lossless Limit)

z Negative Current Limiter

The constant-on-time PWM control scheme handles wide

input/output ratios with ease and provides 100ns “instant-

on” response to load transient while maintaining a

relatively constant frequency. It provides the high efficiency,

excellent transient response, and DC output accuracy

needed for stepping down high voltage batteries to

generate low voltage CPU core, graphics, I/O and chipset

RAM supplies in notebook computers.

z Voltage Transient Overshoot Eliminator*

z Over Voltage Protection

z Under Voltage Protection

z 4 Steps Current Limit During Soft-Start

z Power Good Indicator

z RoHS Compliant and Halogen Free

* Paten Pending

The RT8208A/B achieves high efficiency at a reduced cost

by eliminating the current sense resistor in traditional

current mode PWMs. Efficiency is further enhanced by

its ability to drive very large synchronous rectifier

MOSFETs. The buck conversion allows this device to

directly step down from high voltage batteries for the highest

possible efficiency. Additional features include soft-start,

under voltage protection, programmable over current

protection and non-overlapping gate drive. The RT8208A/

B is available in a WQFN-16L 3x3 package.

Applications

z Notebook Computers

z System Power Supplies

z I/O Supplies

z Programmable-Output Power Supplies

Ordering Information

RT8208

Package Type

QW : WQFN-16L 3x3 (W-Type)

Pin Configurations

Lead Plating System

(TOP VIEW)

G : Green (Halogen Free and Pb Free)

Z : ECO (Ecological Element with

Halogen Free and Pb free)

16 15 14 13

Turn-on D0/D1 MOSFET

A : G0/G1 High

B : G0/G1 Low

VOUT

VDD

UGATE

PHASE

GND

PGOOD

VDDP

Note :

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

WQFN-16L 3x3

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

DS8208A/B-04 May 2011

www.richtek.com

12 3 4 5 6 7...18

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与RT8208BGQW相关器件

型号	品牌	获取价格	描述	数据表
RT8208BZQW	RICHTEK	获取价格	Resistor Programmable Output Voltage from 0.75V to 3.3V with Integrated Transition Support
RT8208D	RICHTEK	获取价格	暂无描述
RT8208E	RICHTEK	获取价格	暂无描述
RT8208F	RICHTEK	获取价格	Programmable Output Voltage Single Synchronous Buck Controller
RT8209L	RICHTEK	获取价格	暂无描述
RT8209M	RICHTEK	获取价格	暂无描述
RT8209N	RICHTEK	获取价格	暂无描述
RT8209P	RICHTEK	获取价格	暂无描述
RT8223A	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computers
RT8223L	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer

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