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參數(shù)資料
| 型號(hào)： | LM3204 |
| 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(diào)，降壓的DC - DC轉(zhuǎn)換器旁路模式射頻功率放大器 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大小： | 874K |
| 代理商： | LM3204 |
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LM3204
Miniature, Adjustable, Step-Down DC-DC Converter with
Bypass Mode for RF Power Amplifiers
General Description
The LM3204 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 an adjustable
output voltage of 0.8V to 3.6V. The output voltage is set
using an analog input ( V
CON
) for optimizing efficiency of the
RF PA at various power levels.
The LM3204 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. LM3204 has both forced and auto-
matic bypass modes. Shutdown mode turns the device off
and reduces battery consumption to 0.1μA (typ.).
The LM3204 is available in a 10-pin lead free micro SMD
package. A high switching frequency (2MHz) allows use of
tiny surface-mount components. Only three small external
surface-mount components, an inductor and two ceramic
capacitors are required.
Features
n
2MHz (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 Turn on time when Enabled (50μs Typ.), 3GPP
Compliant
n
300mA Maximum load capability (PWM mode)
n
500mA Maximum load capability (Bypass mode)
n
PWM, Forced and Automatic Bypass Mode
n
High Efficiency (96% Typ. at 3.6V
IN
, 3.2V
OUT
at 120mA)
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
20138901
November 2005
L
A
2005 National Semiconductor Corporation
DS201389
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3204TL | Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers |
| LM3204TLX | Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers |
| LM3205 | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
| LM3205SD-2 | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
| LM3205SDX-2 | 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3204TL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:CONVERTER BUCK 0.5A ADJ POWERWISE |
| LM3204TL/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 |
| LM3204TLEV | 功能描述:電源管理IC開發(fā)工具 LM3204 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM3204TLX | 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 |
| LM3204TLX/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 |
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