LM3671MF-2.8NPB

更新时间： 2024-11-14 13:09:23

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
24页	7457K
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LM3671MF-2.8NPB 数据手册

October 28, 2008

LM3671

2MHz, 600mA Step-Down DC-DC Converter

General Description

Features

The LM3671 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 different fixed voltage output options avail-

able as well as an adjustable output voltage version range

from 1.1V to 3.3V.

16 µA typical quiescent current

■

600 mA maximum load capability

2 MHz PWM fixed switching frequency (typ.)

Automatic PFM/PWM mode switching

Internal synchronous rectification for high efficiency

Internal soft start

■

The device offers superior features and performance for mo-

bile phones and similar portable systems. Automatic intelli-

gent switching between PWM low-noise and PFM low-current

mode offers improved system control. During PWM mode, the

device operates at a fixed-frequency of 2 MHz (typ.). Hys-

teretic PFM mode extends the battery life by reducing the

quiescent current to 16 µA (typ.) during light load and standby

operation. Internal synchronous rectification provides high ef-

ficiency during PWM mode operation. In shutdown mode, the

device turns off and reduces battery consumption to 0.01 µA

(typ.).

0.01 µA typical shutdown current

Operates from a single Li-Ion cell battery

Only three tiny surface-mount external components

required (one inductor, two ceramic capacitors)

Current overload and Thermal shutdown protection

Available in fixed output voltages and adjustable version

SOT23-5, 5-bump micro SMD and 6-pin LLP packages

■

Applications

Mobile phones

■

The LM3671 is available in SOT23-5, tiny 5-bump micro SMD

and a 6-pin LLP packages in leaded (PB) and lead-free (NO

PB) versions. A high switching frequency of 2 MHz (typ.) al-

lows use of tiny surface-mount components. Only three ex-

ternal surface-mount components, an inductor and two

ceramic capacitors, are required.

PDAs

MP3 players

W-LAN

Portable instruments

Digital still cameras

Portable Hard disk drives

Typical Application Circuits

20108401

FIGURE 1. Typical Application Circuit

201084

www.national.com

12 3 4 5 6 7...24

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与LM3671MF-2.8NPB相关器件

型号	品牌	获取价格	描述	数据表
LM3671MF-3.3	TI	获取价格	LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter
LM3671MF-3.3	NSC	获取价格	2MHz, 600mA Step-Down DC-DC Converter
LM3671MF-3.3/NOPB	TI	获取价格	LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter
LM3671MF-3.3/NOPB	NSC	获取价格	IC 1.15 A SWITCHING REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PDSO5, 2.92 X 2.84 MM, 1.20 MM
LM3671MF-ADJ	NSC	获取价格	2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
LM3671MF-ADJ	TI	获取价格	LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter
LM3671MF-ADJ/NOPB	TI	获取价格	LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter
LM3671MFX-1.2	NSC	获取价格	2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
LM3671MFX-1.2	TI	获取价格	LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter
LM3671MFX-1.2/NOPB	TI	获取价格	LM3671, LM3671Q 2MHz, 600mA Step-Down DC-DC Converter

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