RT9226BCS ETC, RT9226BCS Datasheet

RT9226BCS

Manufacturer Part Number

RT9226BCS

Description

SYNCHRONOUS PWM STEP-DOWN DC/DC CONVERTER CONTROLLER

Manufacturer

ETC

Datasheet

1.RT9226BCS.pdf (6 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

RT9226BCS

Manufacturer:

RICHTEK/立錡

Quantity:

20 000

Current page: 1 of 6
Download datasheet (140Kb)

General Description

The RT9226B is a low cost, high-efficiency voltage-

mode PWM controller for motherboard power supply

application. Synchronous N-channel MOSFET driver,

short-circuit protection, and soft start function are

integrated in a single chip. A simple high power buck

regulator

implemented with minimum external components.

The RT9226B provides current-limit protection by

monitoring the voltage drop across N-channel

MOSFET in over current condition, therefore,

eliminates the current sensing resistor and minimizes

the efficiency loss. The soft start function reduces the

stress on power supply and components in power on

duration. The 200 kHz operating frequency and high

speed PWM control loop with Synchronous N-

channel

compromise between efficiency, cost, and response

speed.

monitoring for power good indication and over

voltage protection.

Ordering Information

RT9226B

DS9226B-01 May 2001

Synchronous PWM Step-down DC/DC Converter Controller

Other

MOSFET

with

Package type

S : SOP-14

Operating temperature range

C: Commercial standard

features

shutdown

driver

include

function

provide

output

optimized

can

voltage

Preliminary

Features

Applications

Pin Configurations

RT9226BCS

(Plastic SOP-14)

Part Number

Low Cost CPU Power Supply

Motherboard I/O Power Supply

Add-On Card Power Supply

DDR SDRAM Bus Terminator Power Supply

Synchronous N-channel MOSFET Driver

High Efficiency

Fast

Frequency

Adjustable Current Limit by Sensing MOSFET

Resistor

Shutdown Function

Power Good Indication Output and Over-

voltage Protection

DS(ON)

Response

without

PGNDH

OCSET

VSEN

with

GND

Extra

Pin Configurations

TOP VIEW

200kHz

www.richtek-ic.com.tw

Current

RT9226B

Operating

VCC

LGATE

PGNDL

BOOT

UGATE

PHASE

PGOOD

Sensing

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