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參數資料
型號: LM3203TL
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩壓器
英文描述: Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers
中文描述: SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, BGA10
封裝: LEAD FREE, THIN MICRO BUMP, 10 PIN
文件頁數: 1/15頁
文件大?。?/td> 1360K
代理商: LM3203TL
LM3203
Step-Down DC-DC Converter with Bypass Mode for
CDMA / WCDMA RF Power Amplifiers
General Description
The LM3203 is a DC-DC converter optimized for powering
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 of 2.7V to 5.5V to an adjustable
output voltage of 0.8V to 3.6V. The output voltage is set
using a V
analog input and external resistor dividers for
optimizing efficiency of the RF PA at various power levels.
The LM3203 offers 3 modes 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. Shutdown
mode turns the device off and reduces battery consumption
to 0.1μA (typ.).
The LM3203 is available in a 10-pin lead free micro SMD
package. A high switching frequency (2MHz) allows use of
tiny surface-mount components.
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
500mA Maximum load capability (PWM and Bypass
mode)
n
PWM / Forced Bypass Mode
n
Low R
DSON
Bypass FET: 85m
(typ.)
n
High Efficiency (96% typ. at 3.6V
IN
, 3.2V
OUT
at 150mA)
n
Fast Turn-on time when Enabled (50μs typ.), 3GPP
Compliant
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
20141601
July 2005
L
A
2005 National Semiconductor Corporation
DS201416
www.national.com
相關PDF資料
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相關代理商/技術參數
參數描述
LM3203TL/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
LM3203TLEV 功能描述:電源管理IC開發工具 LM3203 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
LM3203TLX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers
LM3203TLX/J7002328 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
LM3203TLX/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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