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参数资料
| 型号： | LM2621MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.85 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 1/13页 |
| 文件大小： | 306K |
| 代理商： | LM2621MDC |
LM2621
Low Input Voltage, Step-Up DC-DC Converter
General Description
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 con-
verts it into a regulated output voltage. The output voltage
can be adjusted between 1.24V and 14V. It has an internal
0.17
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 capaci-
tors. Because of the unique constant-duty-cycle gated oscil-
lator topology very high efficiencies are realized over a wide
load range. The supply current is reduced to 80A because
of the BiCMOS process technology. In the shutdown mode,
the supply current is less than 2.5A.
The LM2621 is available in a Mini-SO-8 package. This pack-
age uses half the board area of a standard 8-pin SO and has
a height of just 1.09 mm.
Features
n
Small Mini-SO8 Package (Half the Footprint of Standard
8-Pin SO Package)
n
1.09 mm Package Height
n
Up to 2 MHz Switching Frequency
n
1.2V to 14V Input Voltage
n
1.24V - 14V Adjustable Output Voltage
n
Up to 1A Load Current
n
0.17
Internal MOSFET
n
Up to 90% Regulator Efficiency
n
80 A Typical Operating Current
n <
2.5A Guaranteed Supply Current In Shutdown
Applications
n
PDAs, Cellular Phones
n
2-Cell and 3-Cell Battery-Operated Equipment
n
PCMCIA Cards, Memory Cards
n
Flash Memory Programming
n
TFT/LCD Applications
n
3.3V to 5.0V Conversion
n
GPS Devices
n
Two-Way Pagers
n
Palmtop Computers
n
Hand-Held Instruments
Typical Application Circuit
DS100934-12
February 2000
LM2621
Low
Input
V
oltage,
Step-Up
DC-DC
Converter
2000 National Semiconductor Corporation
DS100934
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| 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 |
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