Datasheet > LM3674

LM3674

更新时间： 2024-11-15 12:02:11

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德州仪器 - TI		转换器
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描述
LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23

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LM3674 数据手册

LM3674

www.ti.com

SNVS405F –DECEMBER 2005–REVISED MAY 2013

LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23

Check for Samples: LM3674

FEATURES

DESCRIPTION

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 output voltage

versions.

•

600mA Max Load Current

Input Voltage Range from 2.7V to 5.5V

Available in Fixed and Adjustable Output

Voltages Ranging from 1.0V to 3.3V

•

Operates from a Single Li-Ion Cell Battery

Internal Synchronous Rectification for High

Efficiency

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 efficiency during Pulse

Width Modulation (PWM) mode operation. In

shutdown mode, the device turns off and reduces

battery consumption to 0.01 µA (typ).

•

Internal Soft Start

0.01 µA Typical Shutdown Current

2 MHz PWM Fixed Switching Frequency (typ)

5-Pin SOT-23 Package

Current Overload Protection and Thermal

Shutdown Protection

The LM3674 is available in a 5-pin SOT-23 package

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

•

Mobile Phones

PDAs

MP3 Players

Portable Instruments

W-LAN

Digital Still Cameras

Portable Hard Disk Drives

TYPICAL APPLICATION CIRCUITS

L1:2.2 mH

OUT

2.7V to 5.5V

OUT

LM3674

10 mF

4.7 mF

GND

Figure 1. Typical Application Circuit

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...25

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与LM3674相关器件

型号	品牌	获取价格	描述	数据表
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

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