- 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:8V 至 40V、5A SIMPLE SWITCHER 高效降压转换器
- 点击这里打开及下载LM2678的技术文档资料
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The LM2678 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 LM2678 are available from several manufacturers to greatly simplify the design process.
The LM2678 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.
- Efficiency Up to 92%
- Simple and Easy to Design Using Off-the-Shelf External Components
- 120-mΩ DMOS Output Switch
- 3.3-V, 5-V, and 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
- Create a Custom Design Using the LM2678 With the WEBENCH? Power Designer
- 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
- Frequency Synchronization, Over Current Protection
- Rating
- Catalog
- Regulated outputs (#)
- 1
- Control mode
- Voltage Mode
- Duty cycle (Max) (%)
- 91
LM2678的完整型号有:LM2678S-12/NOPB、LM2678S-3.3/NOPB、LM2678S-5.0/NOPB、LM2678S-ADJ/NOPB、LM2678SD-12/NOPB、LM2678SD-3.3/NOPB、LM2678SD-5.0/NOPB、LM2678SD-ADJ/NOPB、LM2678SDX-3.3/NOPB、LM2678SDX-5.0/NOPB、LM2678SDX-ADJ/NOPB、LM2678SX-12/NOPB、LM2678SX-3.3/NOPB、LM2678SX-5.0/NOPB、LM2678SX-ADJ/NOPB、LM2678T-12/NOPB、LM2678T-3.3/NOPB、LM2678T-5.0/NOPB、LM2678T-ADJ/NOPB、LM2678S-12、LM2678S-3.3、LM2678S-5.0、LM2678S-ADJ、LM2678SD-12、LM2678SX-ADJ、LM2678T-5.0、LM2678T-ADJ,以下是这些产品的关键参数及官网采购报价:
LM2678S-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LM2678S-12/NOPB的批量USD价格:2.772(1000+)
LM2678S-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LM2678S-3.3/NOPB的批量USD价格:2.772(1000+)
LM2678S-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LM2678S-5.0/NOPB的批量USD价格:2.772(1000+)
LM2678S-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LM2678S-ADJ/NOPB的批量USD价格:2.772(1000+)
LM2678SD-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LM2678SD-12/NOPB的批量USD价格:2.31(1000+)
LM2678SD-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LM2678SD-3.3/NOPB的批量USD价格:2.772(1000+)
LM2678SD-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LM2678SD-5.0/NOPB的批量USD价格:2.772(1000+)
LM2678SD-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LM2678SD-ADJ/NOPB的批量USD价格:2.772(1000+)
LM2678SDX-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LM2678SDX-3.3/NOPB的批量USD价格:2.31(1000+)
LM2678SDX-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LM2678SDX-5.0/NOPB的批量USD价格:2.31(1000+)
LM2678SDX-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LM2678SDX-ADJ/NOPB的批量USD价格:2.31(1000+)
LM2678SX-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LM2678SX-12/NOPB的批量USD价格:2.31(1000+)
LM2678SX-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LM2678SX-3.3/NOPB的批量USD价格:2.31(1000+)
LM2678SX-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LM2678SX-5.0/NOPB的批量USD价格:2.31(1000+)
LM2678SX-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LM2678SX-ADJ/NOPB的批量USD价格:2.31(1000+)
LM2678T-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LM2678T-12/NOPB的批量USD价格:2.31(1000+)
LM2678T-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LM2678T-3.3/NOPB的批量USD价格:2.31(1000+)
LM2678T-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LM2678T-5.0/NOPB的批量USD价格:2.31(1000+)
LM2678T-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LM2678T-ADJ/NOPB的批量USD价格:2.31(1000+)
LM2678S-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LM2678S-12的批量USD价格:3.812(1000+)
LM2678S-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LM2678S-3.3的批量USD价格:3.812(1000+)
LM2678S-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LM2678S-5.0的批量USD价格:3.812(1000+)
LM2678S-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LM2678S-ADJ的批量USD价格:3.812(1000+)
LM2678SD-12,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:SNPB,TI官网LM2678SD-12的批量USD价格:3.35(1000+)
LM2678SX-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LM2678SX-ADJ的批量USD价格:3.35(1000+)
LM2678T-5.0,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LM2678T-5.0的批量USD价格:3.35(1000+)
LM2678T-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LM2678T-ADJ的批量USD价格:3.35(1000+)
LM2678 Unencrypted PSpice Transient Model Package (Rev. A)
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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