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参数资料
| 型号： | LM2623ALDX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, DSO14 |
| 封装： | LLP-14 |
| 文件页数： | 1/11页 |
| 文件大小： | 596K |
| 代理商： | LM2623ALDX/NOPB |
LM2623
General Purpose, Gated Oscillator Based, DC/DC Boost
Converter
General Description
The LM2623 is a high efficiency, general purpose, step-up
DC-DC switching regulator for battery-powered and low in-
put voltage systems. It accepts an input voltage between .8
and 14 volts and converts it into a regulated output voltage
between 1.24 and 14 volts. Efficiencies up to 90% are
achievable with the LM2623.
In order to adapt to a number of applications, the LM2623
allows the designer to vary the output voltage, the operating
frequency (300kHz to 2 MHz) and duty cycle (17% to 90%)
to optimize the part’s performance. The selected values can
be fixed or can vary with battery voltage or input to output
voltage ratio. The LM2623 uses a very simple, on/off regu-
lation mode to produce good efficiency and stable operation
over a wide operating range. It normally regulates by skip-
ping switching cycles when it reaches the regulation limit
(Pulse Frequency Modulation).
Note: Please read the "Non-Linear Effect" and "Choosing
The Correct C3 Capacitor" sub-sections of the Design Pro-
cedure section of this data sheet, so that any challenges with
designing with this part can be taken into account before a
board design/layout is finalized.
For Alternative Solutions, See Also: LM2700, LM2622,
LM2731, LM2733, and LM2621.
Features
n
Good Efficiency Over a Very Wide Load Range
n
Very Low Output Voltage Ripple
n
Small, Mini-SO-8 Package (Half the Footprint of
Standard 8 pin SO Package)
n
1.09 mm Package Height
n
Up to 2 MHz Switching Frequency
n
.8V to 14V Operating Voltage
n
1.1V Start-up Voltage
n
1.24V - 14V Adjustable Output Voltage
n
Up to 2A Load Current at low Output Voltages
n
0.17
Internal MOSFET
n
Up to 90% Regulator Efficiency
n
80 A Typical Operating Current (into V
DD pin of supply)
n <
2.5A Guaranteed Supply Current In Shutdown
n
4mm x 4mm Thermally Enhanced LLP Package Option
Applications
n
Cameras, Pagers and Cell Phones
n
PDAs,Palmtop Computers, GPS devices
n
White LED Drive, TFT or Scanned LCDs
n
Flash Memory Programming
n
Hand-Held Instruments
n
1, 2, 3 or 4 Cell Alkaline Systems
n
1, 2 or 3 Cell Lithium-ion Systems
Typical Application Circuit
20038801
December 2005
LM2623
General
Purpose,
Gated
Oscillator
Based,
DC/DC
Boost
Converter
2005 National Semiconductor Corporation
DS200388
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2623AMM | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM2623AMM/NOPB | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM2623AMMX | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM2623AMMX/NOPB | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM2623EV | 功能描述:BOARD EVALUATION LM2623 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:PowerWise® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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