- 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 8V 至 40V、3A SIMPLE SWITCHER 降压转换器
- 点击这里打开及下载LM2673的技术文档资料
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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.
- 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
- Vin (Min) (V)
- 8
- Vin (Max) (V)
- 40
- Vout (Min) (V)
- 1.23
- Vout (Max) (V)
- 37
- Iout (Max) (A)
- 3
- Iq (Typ) (uA)
- 4200
- Switching frequency (Min) (kHz)
- 260
- Switching frequency (Max) (kHz)
- 260
- Features
- Enable, Over Current Protection
- Rating
- Catalog
- Regulated outputs (#)
- 1
- Control mode
- Voltage Mode
- Duty cycle (Max) (%)
- 91
LM2673的完整型号有:LM2673S-12/NOPB、LM2673S-3.3/NOPB、LM2673S-5.0/NOPB、LM2673S-ADJ/NOPB、LM2673SD-12/NOPB、LM2673SD-3.3/NOPB、LM2673SD-5.0/NOPB、LM2673SD-ADJ/NOPB、LM2673SDX-3.3/NOPB、LM2673SDX-5.0/NOPB、LM2673SDX-ADJ/NOPB、LM2673SX-12/NOPB、LM2673SX-3.3/NOPB、LM2673SX-5.0/NOPB、LM2673SX-ADJ/NOPB、LM2673T-12/NOPB、LM2673T-5.0/NOPB、LM2673T-ADJ/NOPB、LM2673S-12、LM2673S-3.3、LM2673S-5.0、LM2673S-ADJ、LM2673SX-ADJ、LM2673T-ADJ,以下是这些产品的关键参数及官网采购报价:
LM2673S-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LM2673S-12/NOPB的批量USD价格:2.332(1000+)
LM2673S-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LM2673S-3.3/NOPB的批量USD价格:2.332(1000+)
LM2673S-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LM2673S-5.0/NOPB的批量USD价格:2.332(1000+)
LM2673S-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LM2673S-ADJ/NOPB的批量USD价格:2.332(1000+)
LM2673SD-12/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LM2673SD-12/NOPB的批量USD价格:1.943(1000+)
LM2673SD-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LM2673SD-3.3/NOPB的批量USD价格:2.332(1000+)
LM2673SD-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LM2673SD-5.0/NOPB的批量USD价格:2.332(1000+)
LM2673SD-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LM2673SD-ADJ/NOPB的批量USD价格:2.332(1000+)
LM2673SDX-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LM2673SDX-3.3/NOPB的批量USD价格:1.943(1000+)
LM2673SDX-5.0/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LM2673SDX-5.0/NOPB的批量USD价格:1.943(1000+)
LM2673SDX-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LM2673SDX-ADJ/NOPB的批量USD价格:1.943(1000+)
LM2673SX-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LM2673SX-12/NOPB的批量USD价格:1.943(1000+)
LM2673SX-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LM2673SX-3.3/NOPB的批量USD价格:1.943(1000+)
LM2673SX-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LM2673SX-5.0/NOPB的批量USD价格:1.943(1000+)
LM2673SX-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LM2673SX-ADJ/NOPB的批量USD价格:1.943(1000+)
LM2673T-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LM2673T-12/NOPB的批量USD价格:1.943(1000+)
LM2673T-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LM2673T-5.0/NOPB的批量USD价格:1.943(1000+)
LM2673T-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LM2673T-ADJ/NOPB的批量USD价格:1.943(1000+)
LM2673S-12,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LM2673S-12的批量USD价格:3.206(1000+)
LM2673S-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LM2673S-3.3的批量USD价格:3.206(1000+)
LM2673S-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LM2673S-5.0的批量USD价格:3.206(1000+)
LM2673S-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LM2673S-ADJ的批量USD价格:3.206(1000+)
LM2673SX-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LM2673SX-ADJ的批量USD价格:2.817(1000+)
LM2673T-ADJ,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:SNPB,TI官网LM2673T-ADJ的批量USD价格:2.817(1000+)
LM2673-5.0EVAL — 具有可调节电流限制的 SIMPLE SWITCHER® 3A 降压电压稳压器评估模块
Simple Switcher 3A Step-Down Voltage Regulatory with Adjustable Current Limit
LM2673 Unencrypted PSpice Transient Model Package (Rev. B)
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。借助?PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。
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