Datasheet > LM3678

LM3678

更新时间： 2024-11-15 04:44:23

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
14页	1219K
描述
High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications

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

LM3678 数据手册

April 30, 2008

LM3678 High-Performance, Miniature 1.5A Step-Down DC-

DC Converter for Handheld Applications

General Description

Features

The LM3678 step-down DC-DC converter is optimized for

powering low voltage circuits from a single Li-Ion cell battery

and input voltage rails from 2.5V to 5.5V. It provides up to 1.5A

load current, over the entire input voltage range. LM3678 of-

fers a 0.8V/1.2V option. One of the pair of voltages is set

through the VSELECT pin.

V_OUT= 0.8V/1.2V

■

V_IN= 2.5V to 5.5V

1.5A maximum load capability

3.3MHz PWM fixed switching frequency (typ.) allows the

use of 1µH inductor

+/- 3% DC output voltage precision

■

LM3678 operates in PWM mode with a fixed frequency of

3.3MHz. Internal synchronous rectification provides high ef-

ficiency during PWM mode operation. In shutdown mode, the

device turns off and reduces battery consumption to 0.01µA

(typ).

0.01µA typical shutdown current

Internal synchronous rectification for high efficiency

Internal soft start

Current overload and thermal shutdown protection

■

The LM3678 is available in a 3mm x 3mm LLP-10 package.

A high switching frequency of 3.3MHz (typ.) allows use of tiny

surface-mount components. Only three external surface-

mount components, an inductor and two ceramic capacitors,

are required (solution size less than 33 mm²). For voltages

other than the voltage shown, please refer to ordering infor-

mation section or contact National Semiconductor.

Applications

PDAs and Smart Phones

■

Personal Media Players

W-LAN

USB Modem Applications

Digital still cameras

Portable Hard disk drives

Typical Application Circuit

Efficiency vs. Output Current

( V_OUT= 1.2V)

20204501

Note: V_SELH = 1.2V, V_SELL = 0.8V

20204504

FIGURE 1.

202045

www.national.com

12 3 4 5 6 7...14

中文翻译

下载PDF

与LM3678相关器件

型号	品牌	获取价格	描述	数据表
LM3678SD-1.2	NSC	获取价格	High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications
LM3678SD-1.2/NOPB	TI	获取价格	用于便携式应用的高性能、微型 1.5A 降压直流/直流转换器 \| DSC \| 10 \| -
LM3678SDE-1.2	NSC	获取价格	High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications
LM3678SDE-1.2/NOPB	NSC	获取价格	IC 2.4 A SWITCHING REGULATOR, 3600 kHz SWITCHING FREQ-MAX, DSO10, 3 X 3 MM, 0.50 MM PITCH,
LM3678SDE-1.2/NOPB	TI	获取价格	用于便携式应用的高性能、微型 1.5A 降压直流/直流转换器 \| DSC \| 10 \| -
LM3678SDX-1.2	NSC	获取价格	High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications
LM3678SDX-1.2/NOPB	TI	获取价格	High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications 10-WS
LM3679	NSC	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height
LM3679	TI	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height
LM3679_15	TI	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height

与LM3678相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

7
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

4
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

30
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

13

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3678

LM3678 数据手册

与LM3678相关器件

与LM3678相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3678

LM3678 数据手册

与LM3678相关器件

与LM3678相关文章

您还可以找

您在本页遇到什么问题？