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LM2747MTC/NOPB

更新时间： 2024-11-26 01:11:59
品牌 Logo 应用领域
德州仪器 - TI 开关光电二极管输出元件
页数 文件大小 规格书
38页 1260K
描述
Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization

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LM2747MTC/NOPB 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active包装说明：TSSOP,
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：1.66Samacsys Description：1-14V, 1% Accuracy, Voltage Mode Synchronous Buck Controller with Pre-Bias Startup and Optional Cloc
其他特性：OUTPUT VOLTAGE ADJUSTABLE DOWN TO 0.6V模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：6 V最小输入电压：3 V
标称输入电压：3.3 VJESD-30 代码：R-PDSO-G14
JESD-609代码：e4长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：14最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：20 A
最大输出电压：12 V最小输出电压：0.6 V
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260座面最大高度：1.2 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：1000 kHz温度等级：AUTOMOTIVE
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：4.4 mm

LM2747MTC/NOPB 数据手册

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LM2747  
www.ti.com  
SNVS370B –MARCH 2006–REVISED MARCH 2013  
LM2747 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock  
Synchronization  
Check for Samples: LM2747  
1
FEATURES  
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 MOSFETs in both the high-  
side and low-side positions. It senses the low-side  
switch voltage drop for providing a simple, adjustable  
current limit.  
2
•
±1% Feedback Voltage Accuracy Over  
Temperature  
•
•
Switching Frequency from 50 kHz to 1 MHz  
Switching Frequency Synchronize Range 250  
kHz to 1 MHz  
•
•
•
•
•
•
Startup with a Pre-Biased Output Load  
Power Stage Input Voltage from 1V to 14V  
Control Stage Input Voltage from 3V to 6V  
Output Voltage Adjustable Down to 0.6V  
Power Good Flag and Shutdown  
Output Overvoltage and Undervoltage  
Detection  
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 between  
component size, cost and efficiency.  
•
•
•
Low-Side Adjustable Current Sensing  
Adjustable Soft-Start  
Tracking and Sequencing with Shutdown and  
Soft Start Pins  
•
14-Pin TSSOP Package  
APPLICATIONS  
•
•
•
•
•
Down Conversion from 3.3V  
Cable Modem, DSL and ADSL  
Laser Jet and Ink Jet Printers  
Low Voltage Power Modules  
DSP, ASIC, Core and I/O  
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 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.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2006–2013, Texas Instruments Incorporated  
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LM2747MTC/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM2747MTCX/NOPB TI

完全替代

 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization

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