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參數資料
| 型號： | LM3205 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
| 中文描述： | 六百五十零毫安微型，可調，降壓型DC - DC轉換器的射頻功率放大器 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 1285K |
| 代理商： | LM3205 |
LM3205
650mA Miniature, Adjustable, Step-Down DC-DC
Converter for RF Power Amplifiers
General Description
The LM3205 is a DC-DC converter optimized for powering
RF power amplifiers (PAs) from a single Lithium-Ion cell,
however they may be used in many other applications. It
steps down an input voltage from 2.7V to 5.5V to a variable
output voltage from 0.8V(typ.) to 3.6V(typ.). Output voltage
is set using a V
CON
analog input for controlling power levels
and efficiency of the RF PA.
The LM3205 offers superior performance for mobile phones
and similar RF PA applications. Fixed-frequency PWM op-
eration minimizes RF interference. Shutdown function turns
the device off and reduces battery consumption to 0.01 μA
(typ.).
The LM3205 is available in micro SMD package and LLP
package. For all other package options contact your local
NSC sales office.
A high switching frequency (2 MHz) allows use of tiny
surface-mount components. Only three small external
surface-mount components, an inductor and two ceramic
capacitors are required.
Features
n
2 MHz (typ.) PWM Switching Frequency
n
Operates from a single Li-Ion cell (2.7V to 5.5V)
n
Variable Output Voltage (0.8V to 3.6V)
n
Fast Output Voltage Transient (0.8V to 3.6V in 20μs)
n
650mA Maximum load capability
n
High Efficiency (96% Typ at 4.2V
IN
, 3.4V
OUT
at 400mA)
from internal synchronous rectification
n
Current Overload Protection
n
Thermal Overload Protection
Packages
n
8-Pin microSMD (Lead Free)
n
10-Pin LLP
Applications
n
Cellular Phones
n
Hand-Held Radios
n
RF PC Cards
n
Battery Powered RF Devices
Typical Application
20158001
FIGURE 1. LM3205 Typical Application
January 2006
L
2006 National Semiconductor Corporation
DS201580
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM320-5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LM3205_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
| LM3205SD-2 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
| LM3205SD-2/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM3205SDX-2 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
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