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參數資料
| 型號： | LM3208TL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
| 中文描述： | 1.2 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PBGA8 |
| 封裝： | ROHS COMPLIANT, THIN MICRO SMD, 8 PIN |
| 文件頁數： | 1/17頁 |
| 文件大小： | 1651K |
| 代理商： | LM3208TL |
LM3208
650mA Miniature, Adjustable, Step-Down DC-DC
Converter for RF Power Amplifiers
General Description
The LM3208 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 in the range from 2.7V to 5.5V to an
adjustable output voltage of 0.8V to 3.6V. Output voltage is
set by using a V
CON
analog input to control power levels and
efficiency of the RF PA.
The LM3208 offers superior performance for mobile phones
and similar RF PA applications. Fixed-frequency PWM op-
eration minimizes RF interference.Ashutdown function turns
the device off and reduces battery consumption to 0.01 μA
(typ.).
The LM3208 is available in an 8-pin lead-free micro SMD
package. A high switching frequency (2 MHz typ.) 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
Adjustable Output Voltage (0.8V to 3.6V)
n
Fast Output Voltage Transient (0.8V to 3.4V in 25μs
typ.)
n
650mA Maximum load capability
n
High Efficiency (95% typ. at 3.9V
IN
, 3.4V
OUT
at 400mA)
n
8-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
20166301
FIGURE 1. LM3208 Typical Application
April 2006
L
2006 National Semiconductor Corporation
DS201663
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3208TL/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 |
| LM3208TLEV | 功能描述:電源管理IC開發工具 LM3208 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM3208TLX | 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 |
| LM3208TLX/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 |
| LM3208UR/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 |
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