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| 型号： | LM2621MM/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BST FLYBK SEPIC ADJ 8MSOP |
| 标准包装： | 1 |
| 类型： | 升压（升压），回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.24 V ~ 14 V |
| 输入电压： | 1.2 V ~ 14 V |
| 频率 - 开关： | 300kHz ~ 2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MSOP |
| 产品目录页面： | 1298 (CN2011-ZH PDF) |
| 配用： | LM2621EVAL-ND - EVALUATION BOARD FOR LM2621 |
| 其它名称： | LM2621MMDKR |
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 |
|---|---|
| LM2621MMX | 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 |
| LM2621MMX/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 |
| LM2622 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| LM2622_04 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:600kHz/1.3MHz Step-up PWM DC/DC Converter |
| LM2622EVAL | 功能描述:BOARD EVALUATION LM2622 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 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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