參數(shù)資料
型號(hào)： LM2746
廠商： National Semiconductor Corporation
英文描述： Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
中文描述： 低壓N溝道MOSFET同步降壓穩(wěn)壓控制器
文件頁(yè)數(shù)： 1/24頁(yè)
文件大?。?/td> 1087K
代理商： LM2746
LM2746
Low Voltage N-Channel MOSFET Synchronous Buck
Regulator Controller
General Description
The LM2746 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 sections of the IC are rated for 3 to
5.5V, the driver sections are designed to accept input supply
rails as high as 16V. The use of 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 fixed-frequency voltage-mode PWM control architecture
is adjustable from 50 kHz to 1 MHz with one external resis-
tor. 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 soft-start, input undervoltage lockout
(UVLO) and Power Good (based on both undervoltage and
overvoltage 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
Power stage input voltage from 1V to 16V
n
Control stage input voltage from 3V to 5.5V
n
Output voltage adjustable down to 0.6V
n
Power good flag and shutdown
n
Output overvoltage and undervoltage detection
n
±
1% feedback voltage accuracy over temperature
n
Low-side adjustable current sensing
n
Adjustable soft-start
n
Tracking and sequencing with shutdown and soft start
pins
n
Switching frequency from 50 kHz to 1 MHz
n
Exposed pad TSSOP-14 package
Applications
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
20147701
May 2005
L
2005 National Semiconductor Corporation
DS201477
www.national.com
相關(guān)PDF資料
PDF描述
LM2746MXA Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXAX Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2753SD High Power Switched Capacitor Voltage Convertor/Flash LED Driver
LM2753 High Power Switched Capacitor Voltage Convertor/Flash LED Driver
LM2753SDX High Power Switched Capacitor Voltage Convertor/Flash LED Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2746MXA 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXA/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
LM2746MXAX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXAX/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF)
LM2747 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
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