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LM2679的基本参数
  • 制造厂商:TI
  • 产品类别:电源管理
  • 技术类目:直流/直流开关稳压器 - 降压稳压器
  • 功能描述:具有可调节电流限制功能的 SIMPLE SWITCHER 8V 至 40V、5A 降压直流/直流开关稳压器
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LM2679的产品详情:

The LM2679 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 5-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 LM2679 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 LM2679 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 specified to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

LM2679的优势和特性:
  • Efficiency Up to 92%
  • Simple and Easy to Design Using Off-The-Shelf External Components
  • Resistor Programmable Peak Current Limit Over a Range of 3 A to 7 A
  • 120-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
LM2679的参数(英文):
  • Vin (Min) (V)
  • 8
  • Vin (Max) (V)
  • 40
  • Vout (Min) (V)
  • 1.23
  • Vout (Max) (V)
  • 37
  • Iout (Max) (A)
  • 5
  • Iq (Typ) (uA)
  • 4200
  • Switching frequency (Min) (kHz)
  • 260
  • Switching frequency (Max) (kHz)
  • 260
  • Features
  • Adjustable Current Limit, Frequency Synchronization, Over Current Protection
  • Rating
  • Catalog
  • Regulated outputs (#)
  • 1
  • Control mode
  • Voltage Mode
  • Duty cycle (Max) (%)
  • 91
LM2679具体的完整产品型号参数及价格(美元):

LM2679的完整型号有:LM2679S-12/NOPB、LM2679S-3.3/NOPB、LM2679S-5.0/NOPB、LM2679S-ADJ/NOPB、LM2679SD-3.3/NOPB、LM2679SD-5.0/NOPB、LM2679SD-ADJ/NOPB、LM2679SDX-3.3/NOPB、LM2679SDX-ADJ/NOPB、LM2679SX-12/NOPB、LM2679SX-3.3/NOPB、LM2679SX-5.0/NOPB、LM2679SX-ADJ/NOPB、LM2679T-12/NOPB、LM2679T-3.3/NOPB、LM2679T-5.0/NOPB、LM2679T-ADJ/NOPB、LM2679S-3.3、LM2679S-5.0、LM2679S-ADJ、LM2679SX-5.0、LM2679SX-ADJ,以下是这些产品的关键参数及官网采购报价:

LM2679S-12/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679S-12/NOPB的批量USD价格:2.977(1000+)

LM2679S-3.3/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679S-3.3/NOPB的批量USD价格:2.977(1000+)

LM2679S-5.0/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679S-5.0/NOPB的批量USD价格:2.977(1000+)

LM2679S-ADJ/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679S-ADJ/NOPB的批量USD价格:2.977(1000+)

LM2679SD-3.3/NOPB,工作温度:-40 to 125,封装:VSON (NHM)-14,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679SD-3.3/NOPB的批量USD价格:2.977(1000+)

LM2679SD-5.0/NOPB,工作温度:-40 to 125,封装:VSON (NHM)-14,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679SD-5.0/NOPB的批量USD价格:2.481(1000+)

LM2679SD-ADJ/NOPB,工作温度:-40 to 125,封装:VSON (NHM)-14,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679SD-ADJ/NOPB的批量USD价格:2.977(1000+)

LM2679SDX-3.3/NOPB,工作温度:-40 to 125,封装:VSON (NHM)-14,包装数量MPQ:2500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679SDX-3.3/NOPB的批量USD价格:2.481(1000+)

LM2679SDX-ADJ/NOPB,工作温度:-40 to 125,封装:VSON (NHM)-14,包装数量MPQ:2500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679SDX-ADJ/NOPB的批量USD价格:2.481(1000+)

LM2679SX-12/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:500个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679SX-12/NOPB的批量USD价格:2.481(1000+)

LM2679SX-3.3/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:500个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679SX-3.3/NOPB的批量USD价格:2.481(1000+)

LM2679SX-5.0/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:500个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679SX-5.0/NOPB的批量USD价格:2.481(1000+)

LM2679SX-ADJ/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:500个,MSL 等级/回流焊峰值温度:Level-3-245C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2679SX-ADJ/NOPB的批量USD价格:2.481(1000+)

LM2679T-12/NOPB,工作温度:-40 to 125,封装:TO-220 (NDZ)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679T-12/NOPB的批量USD价格:2.481(1000+)

LM2679T-3.3/NOPB,工作温度:-40 to 125,封装:TO-220 (NDZ)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679T-3.3/NOPB的批量USD价格:2.481(1000+)

LM2679T-5.0/NOPB,工作温度:-40 to 125,封装:TO-220 (NDZ)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679T-5.0/NOPB的批量USD价格:2.481(1000+)

LM2679T-ADJ/NOPB,工作温度:-40 to 125,封装:TO-220 (NDZ)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:SN,TI官网LM2679T-ADJ/NOPB的批量USD价格:2.481(1000+)

LM2679S-3.3,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-235C-168 HR,引脚镀层/焊球材料:SNPB,TI官网LM2679S-3.3的批量USD价格:3.597(1000+)

LM2679S-5.0,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-235C-168 HR,引脚镀层/焊球材料:SNPB,TI官网LM2679S-5.0的批量USD价格:3.597(1000+)

LM2679S-ADJ,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:45个,MSL 等级/回流焊峰值温度:Level-3-235C-168 HR,引脚镀层/焊球材料:SNPB,TI官网LM2679S-ADJ的批量USD价格:3.597(1000+)

LM2679SX-5.0,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:500个,MSL 等级/回流焊峰值温度:Level-3-235C-168 HR,引脚镀层/焊球材料:SNPB,TI官网LM2679SX-5.0的批量USD价格:3.101(1000+)

LM2679SX-ADJ,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTW)-7,包装数量MPQ:500个,MSL 等级/回流焊峰值温度:Level-3-235C-168 HR,引脚镀层/焊球材料:SNPB,TI官网LM2679SX-ADJ的批量USD价格:3.101(1000+)

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LM2679的评估套件:

LM2679-5.0EVAL — 具有可调节电流限制的 SIMPLE SWITCHER® 5A 降压电压稳压器评估模块

Simple Switcher 5A Step-Down Voltage Regulator with Adjustable Current Limit

LM2679 PSpice Transient Model

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

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