LM22670

更新时间： 2024-11-11 05:41:59

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器开关
页数	文件大小	规格书
18页	476K
描述
3A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Synchronization or Adjustable Switching Frequency

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM22670 数据手册

November 21, 2008

LM22670

3A SIMPLE SWITCHER®, Step-Down Voltage Regulator

with Synchronization or Adjustable Switching Frequency

General Description

Features

The LM22670 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.

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

ON-resistance N-channel MOSFET. The series consists of a

fixed 5V output and an adjustable version.

Wide input voltage range: 4.5V to 42V

■

Internally compensated voltage mode control

Stable with low ESR ceramic capacitors

120 mΩ N-channel MOSFET TO-263 THIN package

100 mΩ N-channel MOSFET PSOP-8 package

Output voltage options:

-ADJ (outputs as low as 1.285V)

-5.0 (output fixed to 5V)

The SIMPLE SWITCHER^®concept provides for an easy to

use complete design using a minimum number of external

components and National’s WEBENCH^®design tool.

National’s WEBENCH^®tool includes features such as exter-

nal component calculation, electrical simulation, thermal sim-

ulation, and Build-It boards for easy design-in. The switching

clock frequency is provided by an internal fixed frequency os-

cillator which operates at 500 kHz. The switching frequency

can also be adjusted with an external resistor or synchronized

to an external clock up to 1MHz. It is also possible to self-

synchronize multiple regulators to share the same switching

frequency. The LM22670 series also has built in thermal shut-

down, current limiting and an enable control input that can

power down the regulator to a low 25 µA quiescent current

standby condition.

±1.5% feedback reference accuracy

■

Switching frequency of 500 kHz, adjustable between 200

kHz and 1 MHz

-40°C to 125°C operating junction temperature range

Precision enable pin

■

Integrated boot diode

Integrated soft-start

Fully WEBENCH^®enabled

Step-down and inverting buck-boost applications

Package

PSOP-8 (Exposed Pad)

■

TO-263 THIN (Exposed Pad)

Applications

Industrial Control

■

Telecom and Datacom Systems

Embedded Systems

Automotive Telematics and Body Electronics

Conversions from Standard 24V, 12V and 5V Input Rails

■

Simplified Application Schematic

30076001

300760

www.national.com

12 3 4 5 6 7...18

中文翻译

下载PDF

与LM22670相关器件

型号	品牌	获取价格	描述	数据表
LM22670MR-5.0	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
LM22670MR-5.0	NSC	获取价格	3A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22670MR-5.0/NOPB	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator
LM22670MR-ADJ	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
LM22670MR-ADJ	NSC	获取价格	3A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22670MR-ADJ/NOPB	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator
LM22670MRE-5.0	NSC	获取价格	3A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22670MRE-5.0	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
LM22670MRE-5.0/NOPB	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator
LM22670MRE-ADJ	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with

与LM22670相关文章

国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

23
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

7
AMD宣布全球裁员约1000人，调整战略聚焦增长
2024-11-14

8
英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

31

产品中心

服务支持

精选活动

关于我们

帮助中心

LM22670

LM22670 数据手册

与LM22670相关器件

与LM22670相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM22670

LM22670 数据手册

与LM22670相关器件

与LM22670相关文章

您还可以找

您在本页遇到什么问题？