LM2676 SIMPLE SWITCHER® 8V 至 40V、3A 低组件数降压稳压器 | 德州仪器 TI.com.cn

LM2676 (正在供货)

SIMPLE SWITCHER® 8V 至 40V、3A 低组件数降压稳压器

SIMPLE SWITCHER® 8V 至 40V、3A 低组件数降压稳压器 - LM2676
数据表
 

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描述

The LM2676 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 3-A 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 3.3-V, 5-V, and 12-V and an adjustable output version.

The SIMPLE SWITCHER® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2676 are available from several manufacturers to greatly simplify the design process.

The LM2676 series also has built-in thermal shutdown, current limiting and an ON/OFF control input that can power down the regulator to a low 50-µA quiescent current standby condition. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

特性

  • Efficiency Up to 94%
  • Simple and Easy to Design With (Using Off-the-
    Shelf External Components)
  • 150-mΩ DMOS Output Switch
  • 3.3-V, 5-V, 12-V Fixed Output and Adjustable
    (1.2 V to 37 V) Versions
  • 50-µA Standby Current When Switched OFF
  • ±2% Maximum Output Tolerance Over Full Line
    and Load Conditions
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-KHz Fixed Frequency Internal Oscillator
  • –40 to 125°C Operating Junction Temperature
    Range

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参数 与其它产品相比 降压转换器(集成开关)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control mode
Duty cycle (Max) (%)
Operating temperature range (C)
Rating
Package Group
Type
Package size: mm2:W x L (PKG)
LM2676
8    
40    
1.23    
37    
3    
1    
260    
260    
4.2    
Enable
Over Current Protection    
Voltage Mode    
91    
-40 to 125    
Catalog    
DDPAK/TO-263 | 7
TO-220 | 7
VSON | 14    
Converter    
7DDPAK/TO-263: 154 mm2: 15.24 x 10.1 (DDPAK/TO-263 | 7)
See datasheet (TO-220)
14VSON: 30 mm2: 5 x 6 (VSON | 14)    

设计工具

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WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM2676

  最小   最大 范围
输入电压  V 8.0 to 40.0V
输出电压  V 1.21 to 40V
输出电流  A ≤ 3A
环境温度  °C -40 to 125°C


覆盖面积 BOM成本 效率


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