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參數(shù)資料
| 型號： | RT9226B |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SYNCHRONOUS PWM STEP-DOWN DC/DC CONVERTER CONTROLLER |
| 中文描述： | 同步PWM降壓直流/直流轉(zhuǎn)換控制器 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大小： | 139K |
| 代理商： | RT9226B |
Preliminary
RT9226B
DS9226B-01 May 2001
www.richtek-ic.com.tw
1
Synchronous PWM Step-down DC/DC Converter Controller
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
with
shutdown
implemented with minimum external components.
function
can
be
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
MOSFET
driver
compromise between efficiency, cost, and response
speed. Other features include output voltage
monitoring for power good indication and over
voltage protection.
provide
optimized
Ordering Information
RT9226B
Features
z
Synchronous N-channel MOSFET Driver
z
High Efficiency
z
Fast
Frequency
Response
with
200kHz
Operating
z
Adjustable Current Limit by Sensing MOSFET
R
DS(ON)
,
without
Extra
Resistor
Current
Sensing
z
Shutdown Function
z
Power Good Indication Output and Over-
voltage Protection
Applications
z
Low Cost CPU Power Supply
z
Motherboard I/O Power Supply
z
Add-On Card Power Supply
z
DDR SDRAM Bus Terminator Power Supply
Pin Configurations
Part Number
Pin Configurations
RT9226BCS
(Plastic SOP-14)
TOP VIEW
Operating temperature range
C: Commercial standard
Package type
S : SOP-14
1
2
3
4
5
6
7
VSEN
OCSET
SS
FB
EN
GND
PGNDH
VCC
LGATE
PGNDL
BOOT
UGATE
PHASE
PGOOD
14
13
12
11
10
9
8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RT9226BCS | SYNCHRONOUS PWM STEP-DOWN DC/DC CONVERTER CONTROLLER |
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| RT9241CS | Two-Phase DC/DC Controller for CPU Core Power Supply |
| RT9261B-15CB | VFM STEP UP DC/DC CONVERTER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RT9226BCS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SYNCHRONOUS PWM STEP-DOWN DC/DC CONVERTER CONTROLLER |
| RT9226BPS | 制造商:Richtek Technology Corporation 功能描述: |
| RT9227A | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Advanced PWM and Dual Fixed Linear Power Controller |
| RT9227A_07 | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Advanced PWM and Dual Fixed Linear Power Controller |
| RT9227A-CS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Advanced PWM and Dual Fixed Linear Power Controller |
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