- 您現在的位置：買賣IC網 > PDF目錄366258 > 6SP220M (National Semiconductor Corporation) DB-LM3S101 Daughterboard PDF資料下載
參數資料
| 型號： | 6SP220M |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | DB-LM3S101 Daughterboard |
| 中文描述： | 同步降壓控制器，帶有預偏置啟動和可選時鐘同步 |
| 文件頁數： | 1/23頁 |
| 文件大小： | 1002K |
| 代理商： | 6SP220M |
LM2747
Synchronous Buck Controller with Pre-bias Startup, and
Optional Clock Synchronization
General Description
The LM2747 is a high-speed synchronous buck regulator
controller with a feedback voltage accuracy of
±
1%. It can
provide simple down conversion to output voltages as low as
0.6V. Though the control section of the IC is rated for 3 to 6V,
the driver section is designed to accept input supply rails as
high as 14V. The use of adaptive non-overlapping MOSFET
gate drivers helps avoid potential shoot-through problems
while maintaining high efficiency. The IC is designed for the
more cost-effective option of driving only N-channel MOS-
FETs in both the high-side and low-side positions. It senses
the low-side switch voltage drop for providing a simple,
adjustable current limit.
The LM2747 features a fixed-frequency voltage-mode PWM
control architecture which is adjustable from 50 kHz to 1
MHz with one external resistor. In addition, the LM2747 also
allows the switching frequency to be synchronized to an
external clock signal over the range of 250 kHz to 1 MHz.
This wide range of switching frequency gives the power
supply designer the flexibility to make better tradeoffs be-
tween component size, cost and efficiency.
Features include the ability to startup with a pre-biased load
on the output, soft-start, input undervoltage lockout (UVLO)
and Power Good (based on both undervoltage and overvolt-
age detection). In addition, the shutdown pin of the IC can be
used for providing startup delay, and the soft-start pin can be
used for implementing precise tracking, for the purpose of
sequencing with respect to an external rail.
Features
n
±
1% feedback voltage accuracy over temperature
n
Switching frequency from 50 kHz to 1 MHz
n
Switching frequency synchronize range 250 kHz to 1
MHz
n
Startup with a pre-biased output load
n
Power stage input voltage from 1V to 14V
n
Control stage input voltage from 3V to 6V
n
Output voltage adjustable down to 0.6V
n
Power Good flag and shutdown
n
Output overvoltage and undervoltage detection
n
Low-side adjustable current sensing
n
Adjustable soft-start
n
Tracking and sequencing with shutdown and soft start
pins
n
TSSOP-14 package
Applications
n
Down Conversion from 3.3V
n
Cable Modem, DSL and ADSL
n
Laser Jet and Ink Jet Printers
n
Low Voltage Power Modules
n
DSP, ASIC, Core and I/O
Typical Application
20150901
March 2006
L
2006 National Semiconductor Corporation
DS201509
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| 6SVP220MX | 6SVP220MX |
| 6SVP82M | 2-ch DC/DC Converter IC |
| 6SVPA47MAA | 6SVPA47MAA |
| 6Y045AS | SWITCH |
| 8-1393234-4 | SCHALTERPLATTENRELAIS PCB 3.5MM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 6SP680M | 制造商:SANYO Semiconductor Co Ltd 功能描述: |
| 6SPDX | 功能描述:電源排插 6 Outlet 6’ Cord RoHS:否 制造商:Wiremold 出口數量: 浪涌能量額定值: 數據線路保護:N 電線長度:15 ft 安裝風格: 輸出電壓:120 V 電流額定值:15 A |
| 6SPDX-15 | 功能描述:電源排插 6 Outlet 15’ Cord RoHS:否 制造商:Wiremold 出口數量: 浪涌能量額定值: 數據線路保護:N 電線長度:15 ft 安裝風格: 輸出電壓:120 V 電流額定值:15 A |
| 6SPOT | 制造商:Chauvet 功能描述:Six Tri-Color Spots With Bar Complete LED Kit 制造商:CHAUVET 功能描述:COMPLETE LED KIT SIX TRI-COLOR SPOTS WITH BAR |
| 6SPR01 | 制造商:DEC 制造商全稱:DEC 功能描述:6 AMP SUPER-EFFICIENT RECTIFIERS |
發布緊急采購，3分鐘左右您將得到回復。