Datasheet > LM2621

LM2621

更新时间： 2024-11-23 00:01:07

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器
页数	文件大小	规格书
11页	251K
描述
Low Input Voltage, Step-Up DC-DC Converter

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM2621 数据手册

February 2000

LM2621

Low Input Voltage, Step-Up DC-DC Converter

General Description

Features

n Small Mini-SO8 Package (Half the Footprint of Standard

8-Pin SO Package)

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

0.17Ω N-Channel MOSFET power switch. Efficiencies up to

90% are achievable using the LM2621.

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

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 80µA because

of the BiCMOS process technology. In the shutdown mode,

the supply current is less than 2.5µA.

n 0.17 Ω Internal MOSFET

n Up to 90% Regulator Efficiency

n 80 µA Typical Operating Current

2.5µA Guaranteed Supply Current In Shutdown

Applications

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.

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

DS100934

www.national.com

12 3 4 5 6 7...11

中文翻译

下载PDF

与LM2621相关器件

型号	品牌	获取价格	描述	数据表
LM2621_05	NSC	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621_14	TI	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621_15	TI	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621MDC	NSC	获取价格	IC 2.85 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator
LM2621MM	TI	获取价格	LM2621 Low Input Voltage, Step-Up DC-DC Converter
LM2621MM	NSC	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621MM/NOPB	TI	获取价格	1.2V to 14V input voltage, 1A load current, step-up DC-DC 8-VSSOP -40 to 85
LM2621MMX	TI	获取价格	LM2621 Low Input Voltage, Step-Up DC-DC Converter
LM2621MMX	NSC	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621MMX/NOPB	TI	获取价格	1.2V to 14V input voltage, 1A load current, step-up DC-DC 8-VSSOP -40 to 85