- 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:SIMPLE SWITCHER 40V、500mA 低组件数降压稳压器
- 点击这里打开及下载LM2674的技术文档资料
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The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500-mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator.
The LM2674 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of its very high efficiency (>90%), the copper traces on the printed-circuit board are the only heat sinking required.
A family of standard inductors for use with the LM2674 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.
Other features include an ensured ±1.5% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50-µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.
- Efficiency up to 96%
- Available in 8-Pin SOIC, PDIP, and 16-Pin WSON Packages
- Simple and Easy to Design With
- Requires Only 5 External Components
- Uses Readily Available Standard Inductors
- 3-V, 5-V, 12-V, and Adjustable Output Versions
- Adjustable Version Output Voltage Range: 1.21 V to 37 V
- ±1.5% Maximum Output Voltage Tolerance Over Line and Load Conditions
- Ensured 500-mA Output Load Current
- 0.25-Ω DMOS Output Switch
- Wide Input Voltage Range: 8 V to 40 V
- 260-kHz Fixed Frequency Internal Oscillator
- TTL Shutdown Capability, Low Power Standby Mode
- Thermal Shutdown and Current Limit Protection
- Vin (Min) (V)
- 6.5
- Vin (Max) (V)
- 40
- Vout (Min) (V)
- 1.23
- Vout (Max) (V)
- 37
- Iout (Max) (A)
- 0.5
- Iq (Typ) (uA)
- 2500
- 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) (%)
- 95
LM2674的完整型号有:LM2674LD-ADJ/NOPB、LM2674LDX-5.0/NOPB、LM2674M-12/NOPB、LM2674M-3.3/NOPB、LM2674M-5.0/NOPB、LM2674M-ADJ/NOPB、LM2674MX-12/NOPB、LM2674MX-3.3/NOPB、LM2674MX-5.0/NOPB、LM2674MX-ADJ/NOPB、LM2674N-3.3/NOPB、LM2674N-5.0/NOPB、LM2674N-ADJ/NOPB、LM2674M-12、LM2674M-5.0,以下是这些产品的关键参数及官网采购报价:
LM2674LD-ADJ/NOPB,工作温度:-40 to 125,封装:WSON (NHN)-16,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2674LD-ADJ/NOPB的批量USD价格:1.32(1000+)
LM2674LDX-5.0/NOPB,工作温度:-40 to 125,封装:WSON (NHN)-16,包装数量MPQ:4500个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2674LDX-5.0/NOPB的批量USD价格:1.32(1000+)
LM2674M-12/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95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LM2674M-12/NOPB的批量USD价格:1.584(1000+)
LM2674M-3.3/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95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LM2674M-3.3/NOPB的批量USD价格:1.584(1000+)
LM2674M-5.0/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:Call TI,TI官网LM2674M-5.0/NOPB的批量USD价格:1.584(1000+)
LM2674M-ADJ/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95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LM2674M-ADJ/NOPB的批量USD价格:1.584(1000+)
LM2674MX-12/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,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:Call TI,TI官网LM2674MX-12/NOPB的批量USD价格:1.32(1000+)
LM2674MX-3.3/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,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LM2674MX-3.3/NOPB的批量USD价格:1.32(1000+)
LM2674MX-5.0/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,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:Call TI,TI官网LM2674MX-5.0/NOPB的批量USD价格:1.32(1000+)
LM2674MX-ADJ/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,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LM2674MX-ADJ/NOPB的批量USD价格:1.32(1000+)
LM2674N-3.3/NOPB,工作温度:-40 to 125,封装:PDIP (P)-8,包装数量MPQ:40个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网LM2674N-3.3/NOPB的批量USD价格:1.518(1000+)
LM2674N-5.0/NOPB,工作温度:-40 to 125,封装:PDIP (P)-8,包装数量MPQ:40个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网LM2674N-5.0/NOPB的批量USD价格:1.518(1000+)
LM2674N-ADJ/NOPB,工作温度:-40 to 125,封装:PDIP (P)-8,包装数量MPQ:40个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网LM2674N-ADJ/NOPB的批量USD价格:1.518(1000+)
LM2674M-12,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95个,MSL 等级/回流焊峰值温度:Level-1-235C-UNLIM,引脚镀层/焊球材料:SNPB,TI官网LM2674M-12的批量USD价格:2.178(1000+)
LM2674M-5.0,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95个,MSL 等级/回流焊峰值温度:Level-1-235C-UNLIM,引脚镀层/焊球材料:SNPB,TI官网LM2674M-5.0的批量USD价格:2.178(1000+)
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