Datasheet > 电源电路 > 开关式稳压器或控制器> LM2672N-5.0

LM2672N-5.0

更新时间： 2024-09-29 00:01:07

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器稳压器
页数	文件大小	规格书
26页	870K
描述
SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features

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LM2672N-5.0 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	0.300 INCH, PLASTIC, DIP-8	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.12	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	40 V	最小输入电压：	6.5 V
标称输入电压：	12 V	JESD-30 代码：	R-PDIP-T8
JESD-609代码：	e0	长度：	9.8171 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最高工作温度：	125 °C
最低工作温度：	-40 °C	最大输出电流：	2.2 A
标称输出电压：	5 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装等效代码：	DIP8,.3
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	5.08 mm	子类别：	Switching Regulator or Controllers
最大供电电流 (Isup)：	3.6 mA	表面贴装：	NO
切换器配置：	BUCK	最大切换频率：	275 kHz
技术：	DMOS	温度等级：	AUTOMOTIVE
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	7.62 mm
Base Number Matches：	1

LM2672N-5.0 数据手册

February 2005

LM2672

SIMPLE SWITCHER^®Power Converter High Efficiency

1A Step-Down Voltage Regulator with Features

To simplify the LM2672 buck regulator design procedure,

there exists computer design software, LM267X Made

Simple version 1.0.

General Description

The LM2672 series of regulators are monolithic integrated

circuits built with a LMDMOS process. These regulators

provide all the active functions for a step-down (buck)

switching regulator, capable of driving a 1A load current with

excellent line and load regulation. These devices are avail-

able in fixed output voltages of 3.3V, 5.0V, 12V, and an

adjustable output version.

Features

n Efficiency up to 96%

n Available in SO-8 and 8-pin DIP packages

n Computer Design Software LM267X Made Simple

version 1.0

Requiring a minimum number of external components, these

regulators are simple to use and include patented internal

frequency compensation (Patent Nos. 5,382,918 and

5,514,947), fixed frequency oscillator, external shutdown,

soft-start, and frequency synchronization.

n Simple and easy to design with

n Requires only 5 external components

n Uses readily available standard inductors

n 3.3V, 5.0V, 12V, and adjustable output versions

n Adjustable version output voltage range: 1.21V to 37V

The LM2672 series operates at a switching frequency of

260 kHz, thus allowing smaller sized filter components than

what would be needed with lower frequency switching regu-

lators. Because of its very high efficiency ( 90%), the cop-

per traces on the printed circuit board are the only heat

sinking needed.

1.5% max output voltage tolerance over line and load

conditions

n Guaranteed 1A output load current

n 0.25Ω DMOS Output Switch

n Wide input voltage range: 8V to 40V

n 260 kHz fixed frequency internal oscillator

n TTL shutdown capability, low power standby mode

n Soft-start and frequency synchronization

n Thermal shutdown and current limit protection

A family of standard inductors for use with the LM2672 are

available from several different manufacturers. This feature

greatly simplifies the design of switch-mode power supplies

using these advanced ICs. Also included in the datasheet

are selector guides for diodes and capacitors designed to

work in switch-mode power supplies.

Typical Applications

Other features include a guaranteed 1.5% tolerance on

output voltage within specified input voltages and output

load conditions, and 10% on the oscillator frequency. Ex-

ternal shutdown is included, featuring typically 50 µA

stand-by current. The output switch includes current limiting,

as well as thermal shutdown for full protection under fault

conditions.

n Simple High Efficiency ( 90%) Step-Down (Buck)

Regulator

n Efficient Pre-Regulator for Linear Regulators

Typical Application (Fixed Output Voltage

Versions)

01293401

SIMPLE SWITCHER^®is a registered trademark of National Semiconductor Corporation.

Windows^®is a registered trademark of Microsoft Corporation.

DS012934

www.national.com

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中文翻译

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LM2672N-5.0 替代型号

型号	品牌	替代类型	描述	数据表
LM2672N-5.0/NOPB	NSC	功能相似	IC 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDIP8, 0.300 INCH, PLASTIC, DIP-
LM2672N-5.0	TI	功能相似	Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features

与LM2672N-5.0相关器件

型号	品牌	获取价格	描述	数据表
LM2672N-5.0/NOPB	NSC	获取价格	IC 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDIP8, 0.300 INCH, PLASTIC, DIP-
LM2672N-5.0/NOPB	ROCHESTER	获取价格	2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDIP8, 0.300 INCH, PLASTIC, DIP-8
LM2672N-5.0/NOPB	TI	获取价格	LM2672 SIMPLE SWITCHERÂ® Power Converter High
LM2672N-ADJ	NSC	获取价格	SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Featur
LM2672N-ADJ	TI	获取价格	Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672N-ADJ/NOPB	TI	获取价格	SIMPLE SWITCHER® 6.5V 至 40V、1A 低组件数降压稳压器 \| P
LM2673	NSC	获取价格	SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
LM2673	TI	获取价格	LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
LM2673_08	NSC	获取价格	SIMPLE SWITCHER㈢ 3A Step-Down Voltage Regulat
LM2673LD-12	NSC	获取价格	IC 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14, LLP-14, Switching Regula

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