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參數資料
| 型號： | LM3200 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers |
| 中文描述： | 微型，可調，降壓的DC - DC轉換器旁路模式射頻功率放大器 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 885K |
| 代理商： | LM3200 |
LM3200
Miniature, Adjustable, Step-Down DC-DC Converter with
Bypass Mode for RF Power Amplifiers
General Description
The LM3200 is a DC-DC converter optimized for powering
RF power amplifiers (PAs) from a single Lithium-Ion cell. It
steps down an input voltage of 2.7V to 5.5V to a variable
output voltage of 0.8V to 3.6V. The output voltage is set
using an analog input ( V
) for optimizing efficiency of the
RF PA at various power levels.
The LM3200 offers superior features and performance for
mobile phones and similar RF PA applications. Fixed-
frequency PWM mode minimizes RF interference. Bypass
mode turns on an internal bypass switch to power the PA
directly from the battery. LM3200 has both forced and auto-
matic bypass modes. Shutdown mode turns the device off
and reduces battery consumption to 0.1 μA (typ.). The
LM3200 is available in a 10-pin lead free micro SMD pack-
age. 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
300 mA Maximum load capability (PWM mode)
n
500 mA Maximum load capability (Bypass mode)
n
PWM, Forced and Automatic Bypass Mode
n
High Efficiency (96% Typ at 3.6V
, 3.2V
OUT
at 120 mA)
from internal synchronous rectification
n
10-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
20126101
November 2004
L
A
2004 National Semiconductor Corporation
DS201261
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3200_05 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers |
| LM320081 | 制造商:Sharp Microelectronics 功能描述:4.7 DFSTN REFLECTIVE 3 |
| LM3200TL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC BUCK CONVERTER POWERWISE 3200 |
| LM3200TL/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 |
| LM3200TLEV | 功能描述:電源管理IC開發(fā)工具 LM3200 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 |
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