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LM3243TMX/NOPB

更新时间： 2024-11-13 11:07:07
品牌 Logo 应用领域
德州仪器 - TI 放大器功率放大器转换器
页数 文件大小 规格书
5页 138K
描述
适用于 2G/3G/4G 功率放大器、具有模拟旁路模式的 2.7MHz、2.5A 降压直流/直流转换器 | YFQ | 16 | -30 to 90

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中文翻译

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LM3243TMX/NOPB 数据手册

 浏览型号LM3243TMX/NOPB的Datasheet PDF文件第2页浏览型号LM3243TMX/NOPB的Datasheet PDF文件第3页浏览型号LM3243TMX/NOPB的Datasheet PDF文件第4页浏览型号LM3243TMX/NOPB的Datasheet PDF文件第5页 
February 24, 2012  
LM3243  
PRODUCT BRIEF  
High-Current Step-Down Converter for 2G/3G/4G RF Power  
Amplifiers  
General Description  
Features  
The LM3243 is a DC-DC converter optimized for powering  
multi-mode 2G/3G/4G RF power amplifiers (PAs) from a sin-  
gle Lithium-Ion cell. The LM3243 steps down an input voltage  
from 2.7V to 5.5V to a dynamically adjustable output voltage  
of 0.4V to 3.6V. The output voltage is set through a VCON  
analog input that adjusts the output voltage to ensure efficient  
operation at all power levels of the RF PA.  
High-Efficiency PFM and PWM modes with Internal  
■
Synchronous Rectification  
Analog Bypass Function with Low Dropout Resistance  
(45 mΩ typ.)  
■
Dynamically Adjustable Output Voltage, 0.4V to 3.6V  
(typ.), in PFM and PWM modes  
■
2.5A Maximum Load Current in PWM Mode  
■
■
■
The LM3243 operates in constant frequency PWM mode pro-  
ducing a small and predictable amount of output voltage  
ripple. This enables best ECTEL power requirements in GM-  
SK and EDGE spectral compliance, with the minimal amount  
of filtering and excess headroom. When operating in PFM  
mode, the LM3243 enables the lowest DG09 current con-  
sumption and therefore maximizes system efficiency.  
2.7 MHz (average) PWM Switching Frequency  
Modulated switching frequency to aid Rx Band  
Compliance  
Operates from a Single Li-ion Cell (2.7V to 5.5V)  
■
■
■
ACB reduces inductor requirements and size  
Minimum total solution size by using small footprint and  
case size inductor and capacitors  
The LM3243 has a unique Active Current assist and analog  
Bypass (ACB) feature to minimize inductor size without any  
loss of output regulation for the entire battery voltage and RF  
output power range, until dropout. ACB provides a parallel  
current path, when needed, to limit the maximum inductor  
current to 1.4A (typ.) while still driving a 2.5A load. The ACB  
also enables operation with minimal dropout voltage. The  
LM3243 is available in a small 2 mm x 2 mm chip-scale 16-  
bump micro SMD package.  
16-bump thin micro SMD Package  
■
■
Current and Thermal Overload Protection  
Applications  
Cellular Phones  
■
■
■
■
Hand-Held Radios  
RF PC Cards  
Notice: This document is not a full datasheet. For more  
information regarding this product or to order samples,  
please contact your local Texas Instruments sales office.  
Battery-Powered RF Devices  
Typical System Application Diagram  
30132101  
© 2012 Texas Instruments Incorporated  
301321 SNVS782  
www.ti.com  
12345

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LM3243TMX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM3243TME/NOPB TI

类似代替

 适用于 2G/3G/4G 功率放大器、具有模拟旁路模式的 2.7MHz、2.5A 降压直流
LM3263TMX/NOPB TI

类似代替

 LM3263 High-Current Step-Down DC-DC Converter
LM3263TME/NOPB TI

类似代替

 LM3263 High-Current Step-Down DC-DC Converter

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