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參數(shù)資料
| 型號： | LM3207TLX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers with Integrated Vref LDO |
| 中文描述： | 1.2 A SWITCHING REGULATOR, 2300 kHz SWITCHING FREQ-MAX, BGA9 |
| 封裝： | MICRO SMD, 9 PIN |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 1335K |
| 代理商： | LM3207TLX |
LM3207
650mA Miniature, Adjustable, Step-Down DC-DC
Converter for RF Power Amplifiers with Integrated Vref
LDO
General Description
The LM3207 is a DC-DC converter optimized for powering
WCDMA / CDMA 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
analog input
for controlling power levels and efficiency of the RF PA.
The LM3207 also provides a regulated reference voltage(V-
ref) required by linear RF power amplifiers through an inte-
grated LDO with a nominal output voltage of 2.875V and
maximum Iref of 10 mA.
The LM3207 is available in a 9-pin lead free micro SMD
package. High switching frequency (2MHz) allows use of
surface-mount
components.
Only
four
small
external
surface-mount components are required, an inductor and
three ceramic capacitors.
Features
n
2MHz (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
650mA Maximum load capability
n
High Efficiency (95% Typ at 3.9V
, 3.4V
OUT
at 400mA)
from internal synchronous rectification
n
Integrated 2.875V Vref LDO
n
Regulated LDO Output up to 10mA max
n
Fast 3uS Vref LDO On/Off Time
n
9-pin micro SMD Package
n
Current Overload Protection
n
Thermal Overload Protection
Applications
n
Cellular Phones
n
Hand-Held Radios
n
RF PC Cards
n
Battery Powered RF Devices
Typical Application
20165301
FIGURE 1. LM3207 Typical Application
August 2006
L
2006 National Semiconductor Corporation
DS201653
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3207TLX/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3207TLX-2.53 | 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 with Integrated Vref LDO |
| LM3207TLX-2.53/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3208 | 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 |
| LM3208TL | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 2.7V to 5.5V 8-Pin uSMD T/R 制造商:Texas Instruments 功能描述:IC, BUCK, 650MA, RF PWR AMP, 8USMD |
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