LM2673 具有可调节电流限制功能的 8V 至 40V、3A SIMPLE SWITCHER® 降压转换器 | 德州仪器 TI.com.cn

LM2673 (正在供货) 具有可调节电流限制功能的 8V 至 40V、3A SIMPLE SWITCHER® 降压转换器

 

备选器件推荐

  • LMZ14203  -  Looking for a power module? Try the LMZ14203
  • LM43603  -  Synchronous 36V, 3A Regulator - Higher efficiency, Low Quiescent Current, Smaller Solution Size
  • LMR33630  -  3.8 to 38V, 3A SIMPLE SWITCHER synchronous buck converter in a 3x2 hotrod or SOIC8 package with ultra-low EMI and highest efficiency

描述

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 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 LM2673 are available from several manufacturers to greatly simplify the design process.

Other features include the ability to reduce the input surge current at power on by adding a soft-start 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 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)
  • Resistor Programmable Peak Current Limit Over a
    Range of 2 A to 5 A
  • 150-mΩ DMOS Output Switch
  • 3.3-V, 5-V, 12-V Fixed Output and Adjustable
    (1.2 V to 37 V) Versions
  • ±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
  • Soft-Start Capability
  • –40 to 125°C Operating Junction Temperature
    Range

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

WEBENCH® Designer LM2673

  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

参数

与其它产品相比 降压转换器(集成开关) 邮件 下载到电子表格中
Part number 立即下单 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)
LM2673 立即下单 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)
7TO-220: 83 mm2: 8.13 x 10.16 (TO-220 | 7)
14VSON: 30 mm2: 5 x 6 (VSON | 14)    
LM2670 立即下单 6.5     40     1.23     37     3     1     260     400     4.2     Frequency Synchronization
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)
7TO-220: 83 mm2: 8.13 x 10.16 (TO-220 | 7)
14VSON: 30 mm2: 5 x 6 (VSON | 14)    
LM2671 立即下单 6.5     40     1.23     37     0.5     1     225     400     2.5     Enable
Over Current Protection    
Voltage Mode     95     -40 to 125     Catalog     PDIP | 8
SOIC | 8
WSON | 16    
Converter     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
16WSON: 25 mm2: 5 x 5 (WSON | 16)    
LM2672 立即下单 6.5     40     1.23     37     1     1     225     400     2.5     Enable
Over Current Protection    
Voltage Mode     95     -40 to 125     Catalog     PDIP | 8
SOIC | 8
WSON | 16    
Converter     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
16WSON: 25 mm2: 5 x 5 (WSON | 16)    
LM2674 立即下单 6.5     40     1.23     37     0.5     1     260