Datasheet > LM2673SD-12

LM2673SD-12

更新时间： 2024-11-15 23:13:35

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
26页	447K
描述
SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit

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LM2673SD-12 数据手册

October 2003

LM2673

SIMPLE SWITCHER^®3A Step-Down Voltage Regulator

with Adjustable Current Limit

General Description

Features

n Efficiency up to 94%

The LM2673 series of regulators are monolithic integrated

circuits which provide all of the active functions for a step-

down (buck) switching regulator capable of driving up to 3A

loads with excellent line and load regulation characteristics.

n Simple and easy to design with (using off-the-shelf

external components)

Resistor programmable peak current limit over a range

of 2A to 5A.

High efficiency ( 90%) is obtained through the use of a low

ON-resistance DMOS power switch. The series consists of

fixed output voltages of 3.3V, 5V and 12V and an adjustable

output version.

n 150 mΩ DMOS output switch

n 3.3V, 5V and 12V fixed output and adjustable (1.2V to

37V ) versions

The SIMPLE SWITCHER concept provides for a complete

design using a minimum number of external components. A

high fixed frequency oscillator (260KHz) allows the use of

physically smaller sized components. A family of standard

inductors for use with the LM2673 are available from several

manufacturers to greatly simplify the design process.

2%maximum output tolerance over full line and load

conditions

n Wide input voltage range: 8V to 40V

n 260 KHz fixed frequency internal oscillator

n Softstart capability

n −40 to +125˚C operating junction temperature range

Other features include the ability to reduce the input surge

current at power-ON by adding a softstart timing capacitor to

gradually turn on the regulator. The LM2673 series also has

built in thermal shutdown and resistor programmable current

limit of the power MOSFET switch to protect the device and

load circuitry under fault conditions. The output voltage is

guaranteed to a 2% tolerance. The clock frequency is

controlled to within a 11% tolerance.

Applications

n Simple to design, high efficiency ( 90%) step-down

switching regulators

n Efficient system pre-regulator for linear voltage

regulators

n Battery chargers

Typical Application

10091303

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

DS100913

www.national.com

12 3 4 5 6 7...26

中文翻译

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与LM2673SD-12相关器件

型号	品牌	获取价格	描述	数据表
LM2673SD-12/NOPB	NSC	获取价格	IC 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, DSO14, LLP-14, Switching Regulat
LM2673SD-12/NOPB	TI	获取价格	LM2673 SIMPLE SWITCHERÂ® 3-A Step-Down Voltag
LM2673SD-3.3	TI	获取价格	LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
LM2673SD-3.3	NSC	获取价格	SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
LM2673SD-3.3/NOPB	TI	获取价格	具有可调节电流限制功能的 8V 至 40V、3A SIMPLE SWITCHER® 降压转
LM2673SD-5.0	TI	获取价格	LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
LM2673SD-5.0	NSC	获取价格	SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
LM2673SD-5.0/NOPB	NSC	获取价格	IC 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, DSO14, LLP-14, Switching Regulat
LM2673SD-5.0/NOPB	TI	获取价格	8V to 40V, 3A SIMPLE SWITCHER® buck converter with adjustable current limit 14-VSO
LM2673SD-ADJ	TI	获取价格	LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current

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