Datasheet > LM22670TJE-5.0

LM22670TJE-5.0

更新时间： 2024-09-14 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

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LM22670TJE-5.0 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

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LM22670TJE-5.0 替代型号

型号	品牌	替代类型	描述	数据表
LM22670TJ-5.0	TI	功能相似	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
LM22670TJ-5.0	NSC	功能相似	3A SIMPLE SWITCHER®, Step-Down Voltage Regula

与LM22670TJE-5.0相关器件

型号	品牌	获取价格	描述	数据表
LM22670TJE-5.0/NOPB	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator
LM22670TJE-ADJ	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
LM22670TJE-ADJ	NSC	获取价格	3A SIMPLE SWITCHER®, Step-Down Voltage Regula
LM22670TJE-ADJ/NOPB	TI	获取价格	LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator
LM22671	NSC	获取价格	500 mA SIMPLE SWITCHER®, Step-Down Voltage Re
LM22671	TI	获取价格	LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER
LM22671_15	TI	获取价格	LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHERÂ® St
LM22671MR-5.0	TI	获取价格	LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER
LM22671MR-5.0	NSC	获取价格	500 mA SIMPLE SWITCHER?, Step-Down Voltage Regulator with Features
LM22671MR-5.0/NOPB	TI	获取价格	LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHERÂ® St

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