LM3674

更新时间： 2024-11-14 23:16:47

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
15页	1100K
描述
2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5

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LM3674 数据手册

January 2006

LM3674

2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5

General Description

Features

n 600mA max load current

The LM3674 step-down DC-DC converter is optimized for

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

and input voltage rails from 2.7V to 5.5V. It provides up to

600mA load current, over the entire input voltage range.

There are several fixed output voltages and adjustable out-

put voltage versions.

n Input voltage range from 2.7V to 5.5V

n Available in fixed and adjustable output voltages ranging

from 1.0V to 3.3V

Operates from a single Li-Ion cell Battery

n Internal synchronous rectification for high efficiency

n Internal soft start

n 0.01 µA typical shutdown current

The device offers superior features and performance for

mobile phones and similar portable systems. During PWM

mode, the device operates at a fixed-frequency of 2 MHz

(typ). Internal synchronous rectification provides high effi-

ciency during PWM mode operation. In shutdown mode, the

device turns off and reduces battery consumption to 0.01 µA

(typ).

2 MHz PWM fixed switching frequency (typ)

n SOT23-5 package

n Current overload protection and Thermal shutdown

protection

The LM3674 is available in SOT23-5 in leaded (PB) and

lead-free (NO PB) versions. A high switching frequency of 2

MHz (typ) allows use of only three tiny external surface-

mount components, an inductor and two ceramic capacitors.

Applications

n Mobile phones

n PDAs

n MP3 players

n Portable instruments

n W-LAN

Digital still cameras

n Portable Hard disk drives

Typical Application

20167201

FIGURE 1. Typical Application Circuit

DS201672

www.national.com

12 3 4 5 6 7...15

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与LM3674相关器件

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LM3674_0609	NSC	获取价格	2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5
LM3674_14	TI	获取价格	2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5
LM3674MF-1.2	NSC	获取价格	2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5
LM3674MF-1.2	TI	获取价格	LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
LM3674MF-1.2/NOPB	TI	获取价格	LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
LM3674MF-1.5	TI	获取价格	LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
LM3674MF-1.5	NSC	获取价格	2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5
LM3674MF-1.5/NOPB	TI	获取价格	LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
LM3674MF-1.8	TI	获取价格	LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
LM3674MF-1.8	NSC	获取价格	2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5