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LM3241TLX/NOPB

更新时间： 2024-11-21 12:27:39
品牌 Logo 应用领域
德州仪器 - TI 转换器放大器射频功率放大器
页数 文件大小 规格书
23页 1436K
描述
LM3241 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers

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LM3241TLX/NOPB 数据手册

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LM3241  
www.ti.com  
SNOSB38B –JANUARY 2009–REVISED APRIL 2013  
LM3241 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power  
Amplifiers  
Check for Samples: LM3241  
1
FEATURES  
DESCRIPTION  
The LM3241 is a DC-DC converter optimized for  
powering RF power amplifiers (PAs) from a single  
Lithium-Ion cell; however, it may be used in many  
other applications. It steps down an input voltage  
from 2.7V to 5.5V to an adjustable output voltage  
from 0.6V to 3.4V. Output voltage is set using a  
VCON analog input for controlling power levels and  
efficiency of the RF PA.  
2
•
6MHz (typ.) PWM Switching Frequency  
•
Operates from a Single Li-Ion Cell (2.7V to  
5.5V)  
•
•
•
Adjustable Output Voltage (0.6V to 3.4V)  
750 mA Maximum Load Capability  
High Efficiency (95% typ. at 3.9VIN, 3.3VOUT at  
500 mA)  
The LM3241 offers three modes of operation. In  
PWM mode the device operates at a fixed frequency  
of 6MHz (typ.) which minimizes RF interference when  
driving medium-to-heavy loads. At light load, the  
device enters into ECO mode automatically and  
operates with reduced switching frequency. In ECO  
mode, the quiescent current is reduced and extends  
the battery life. Shutdown mode turns the device off  
and reduces battery consumption to 0.1 µA (typ.).  
•
•
•
•
•
•
Automatic ECO/PWM mode change  
6-bump DSBGA Package  
Current Overload Protection  
Thermal Overload Protection  
Soft Start Function  
CIN and COUT are 0402 (1005) case size and  
6.3V of rated-voltage ceramic capacitor  
•
Small Chip Inductor in 0805 (2012) case size  
The LM3241 is available in a 6-bump lead-free  
DSBGA package. A high-switching frequency (6MHz)  
allows use of tiny surface-mount components. Only  
three small external surface-mount components, an  
inductor and two ceramic capacitors are required.  
APPLICATIONS  
•
•
•
•
Battery-Powered 3G/4G Power Amplifiers  
Hand-Held Radios  
RF PC Cards  
Battery-Powered RF Devices  
TYPICAL APPLICATION  
V
IN  
2.7V to 5.5V  
V
OUT  
VIN  
0.6V to 3.4V  
0.47 mH  
SW  
FB  
EN  
10 mF  
V
OUT  
= 2.5 x VCON  
LM3241  
VCON  
4.7 mF  
GND  
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.  
All trademarks are the property of their respective owners.  
2
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 © 2009–2013, Texas Instruments Incorporated  
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LM3241TLX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM3241TLE/NOPB TI

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 LM3241 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifier

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