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| 型号： | LM2621EVAL |
| 厂商： | National Semiconductor |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR LM2621 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 输出及类型： | 1，非隔离 |
| 输入电压： | 1.2 ~ 14 V |
| 稳压器拓扑结构： | 升压 |
| 板类型： | 完全填充 |
| 已供物品： | 板，文档 |
| 已用 IC / 零件： | LM2621 |
| 相关产品： | LM2621MMDKR-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP LM2621MMX/NOPBTR-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP LM2621MMTR-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP LM2621MMCT-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP |
| 其它名称： | *LM2621EVAL |
SNVS033C – MAY 2004 – REVISED MARCH 2005
LM2621 Low Input Voltage, Step-Up DC-DC Converter
Check for Samples: LM2621
1
FEATURES
DESCRIPTION
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Small VSSOP8 Package (Half the Footprint of
Standard 8-Pin SOIC Package)
1.09 mm Package Height
Up to 2 MHz Switching Frequency
1.2V to 14V Input Voltage
1.24V - 14V Adjustable Output Voltage
Up to 1A Load Current
0.17 Ω Internal MOSFET
Up to 90% Regulator Efficiency
80 μA Typical Operating Current
<2.5μA Ensured Supply Current In Shutdown
The LM2621 is a high efficiency, step-up DC-DC
switching regulator for battery-powered and low input
voltage systems. It accepts an input voltage between
1.2V and 14V and converts it into a regulated output
voltage. The output voltage can be adjusted between
1.24V and 14V. It has an internal 0.17 Ω N-Channel
MOSFET power switch. Efficiencies up to 90% are
achievable using the LM2621.
The high switching frequency (adjustable up to 2MHz)
of the LM2621 allows for tiny surface mount inductors
and capacitors. Because of the unique constant-duty-
cycle gated oscillator topology very high efficiencies
are realized over a wide load range. The supply
current is reduced to 80μA because of the BiCMOS
APPLICATIONS
process technology. In the shutdown mode, the
supply current is less than 2.5μA.
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PDAs, Cellular Phones
2-Cell and 3-Cell Battery-Operated Equipment
PCMCIA Cards, Memory Cards
Flash Memory Programming
TFT/LCD Applications
3.3V to 5.0V Conversion
GPS Devices
Two-Way Pagers
Palmtop Computers
Hand-Held Instruments
The LM2621 is available in a VSSOP-8 package.
This package uses half the board area of a standard
8-pin SOIC and has a height of just 1.09 mm.
Typical Application Circuit
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright ? 2004–2005, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2621EVAL/NOPB | 功能描述:电源管理IC开发工具 EVAL BOARDFOR LM2621 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM2621MM | 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 |
| LM2621MM | 制造商:Texas Instruments 功能描述:DC/DC UP CONVERTER ADJ SMD 2621 |
| LM2621MM/NOPB | 功能描述:DC/DC 开关控制器 LOW INP VLTG,STEP-UP DC-DC 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 |
| LM2621MM/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
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