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LM2670SD-12EP PDF预览

LM2670SD-12EP

更新时间： 2024-11-16 13:09:19
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德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器
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LM2670SD-12EP 数据手册

 浏览型号LM2670SD-12EP的Datasheet PDF文件第2页浏览型号LM2670SD-12EP的Datasheet PDF文件第3页浏览型号LM2670SD-12EP的Datasheet PDF文件第4页浏览型号LM2670SD-12EP的Datasheet PDF文件第5页浏览型号LM2670SD-12EP的Datasheet PDF文件第6页浏览型号LM2670SD-12EP的Datasheet PDF文件第7页 
LM2670  
www.ti.com  
SNVS036J –APRIL 2000–REVISED APRIL 2013  
®
LM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync  
Check for Samples: LM2670  
1
FEATURES  
DESCRIPTION  
The LM2670 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 DMOS power switch. The series consists  
of fixed output voltages of 3.3V, 5V and 12V output  
version.  
2
•
Efficiency Up to 94%  
•
Simple and Easy to Design with (Using Off-  
The-Shelf External Components)  
•
•
150 mΩ DMOS Output Switch  
3.3V, 5V and 12V Fixed Output and Adjustable  
(1.2V to 37V) Versions  
•
•
50μA Standby Current When Switched OFF  
±2% Maximum Output Tolerance Over Full  
Line and Load Conditions  
The SIMPLE SWITCHER concept provides for a  
complete design using a minimum number of external  
components. The switching clock frequency can be  
provided by an internal fixed frequency oscillator  
(260KHz) or from an externally provided clock in the  
range of 280 kHz to 400 kHz which allows the use of  
physically smaller sized components. A family of  
standard inductors for use with the LM2670 are  
available from several manufacturers to greatly  
simplify the design process. The external Sync clock  
provides direct and precise control of the output ripple  
frequency for consistent filtering or frequency  
spectrum positioning.  
•
•
Wide Input Voltage Range: 8V to 40V  
External Sync Clock Capability (280kHz to  
400kHz)  
•
•
260 kHz Fixed Frequency Internal Oscillator  
−40 to +125°C Operating Junction Temperature  
Range  
APPLICATIONS  
•
Simple to Design, High Efficiency (>90%) Step-  
Down Switching Regulators  
The LM2670 series also has built in thermal  
shutdown, current limiting and an ON/OFF control  
input that can power down the regulator to a low  
50μA quiescent current standby condition. The output  
voltage is ensured to a ±2% tolerance.  
•
Efficient System Pre-Regulator for Linear  
Voltage Regulators  
•
•
Battery Chargers  
Communications and Radio Equipment  
Regulator with Synchronized Clock Frequency  
Typical Application  
1
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.  
SIMPLE SWITCHER, Switchers Made Simple are registered trademarks of Texas Instruments.  
2
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.  
Copyright © 2000–2013, Texas Instruments Incorporated  
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