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參數(shù)資料
| 型號： | LM3207TL/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.2 A SWITCHING REGULATOR, 2300 kHz SWITCHING FREQ-MAX, PBGA9 |
| 封裝： | ROHS COMPLIANT, MICRO SMD, 9 PIN |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 1601K |
| 代理商： | LM3207TL/NOPB |
April 2007
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.). Out-
put voltage is set using a V
CON analog input for controlling
power levels and efficiency of the RF PA.
The LM3207 also provides a regulated reference voltage
(Vref) required by linear RF power amplifiers through an in-
tegrated LDO that has a maximum Iref up to 10 mA. See
Ordering Information table on page 2 for Voltage Options.
The LM3207 is available in a 9-pin lead free micro SMD pack-
age. High switching frequency (2MHz) allows use of surface-
mount components. Only four small external surface-mount
components are required, an inductor and three ceramic ca-
pacitors.
Features
■ 2MHz (typ.) PWM Switching Frequency
■ Operates from a single Li-Ion cell (2.7V to 5.5V)
■ Variable Output Voltage (0.8V to 3.6V)
■ 650mA Maximum load capability
■ High Efficiency (95% Typ at 3.9V
IN, 3.4VOUT at 400mA)
from internal synchronous rectification
■ Integrated Vref LDO
■ Regulated LDO Output up to 10mA max
■ Fast 3uS Vref LDO On/Off Time
■ 9-pin micro SMD Package
■ Current Overload Protection
■ Thermal Overload Protection
Applications
■ Cellular Phones
■ Hand-Held Radios
■ RF PC Cards
■ Battery Powered RF Devices
Typical Application
20165301
FIGURE 1. LM3207 Typical Application
2007 National Semiconductor Corporation
201653
www.national.com
LM3207
650mA
Miniature,
Adjustable,
Step-Down
DC-DC
Converter
for
RF
Power
Amplifiers
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM3207TLX | 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/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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 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 |
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