- 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:4.5V 至 40V、1A SIMPLE SWITCHER 降压转换器
- 点击这里打开及下载LM2598的技术文档资料
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The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load 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.
The LM2598 is a member of the LM259x family.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, fixed-frequency oscillator, Shutdown/Soft-start, error flag delay and error flag output.
The LM2598 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required with lower-frequency switching regulators. Available in a standard 7-lead TO-220 package with several different lead bend options, and a 7-lead DDPAK surface mount package. Typically, for output voltages less than 12 V, and ambient temperatures less than 50°C, no heat sink is required.
A standard series of inductors (both through hole and surface mount types) are available from several different manufacturers optimized for use with the LM2598. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a specified ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85-µA standby current. Self-protection features include a two stage current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.
- 3.3-V, 5-V, 12-V, and Adjustable Output Versions
- Adjustable Version Output Voltage Range, 1.2-V to 37-V ±4% Max Over Line and Load Conditions
- 1-A Output Current
- Available in 7-Pin TO-220 and DDPAK (Surface Mount) Package
- Input Voltage Range Up to 40 V
- Excellent Line and Load Regulation Specifications
- 150 kHz Fixed Frequency Internal Oscillator
- Shutdown/Soft-start
- Out of Regulation Error Flag
- Error Output Delay
- Low Power Standby Mode, IQ, Typically 85μA
- High Efficiency
- Uses Readily Available Standard Inductors
- Thermal Shutdown and Current Limit Protection
- Vin (Min) (V)
- 4.5
- Vin (Max) (V)
- 40
- Vout (Min) (V)
- 3.3
- Vout (Max) (V)
- 37
- Iout (Max) (A)
- 1
- Iq (Typ) (uA)
- 5000
- Switching frequency (Min) (kHz)
- 110
- Switching frequency (Max) (kHz)
- 173
- Features
- Over Current Protection, Power Good
- Rating
- Catalog
- Regulated outputs (#)
- 1
- Control mode
- Voltage Mode
- Duty cycle (Max) (%)
- 100
LM2598的完整型号有:LM2598S-12/NOPB、LM2598S-3.3/NOPB、LM2598S-5.0/NOPB、LM2598S-ADJ/NOPB、LM2598SX-12/NOPB、LM2598SX-3.3/NOPB、LM2598SX-5.0/NOPB、LM2598SX-ADJ/NOPB、LM2598T-12/NOPB、LM2598T-3.3/NOPB、LM2598T-5.0/NOPB、LM2598T-ADJ/NOPB,以下是这些产品的关键参数及官网采购报价:
LM2598S-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LM2598S-12/NOPB的批量USD价格:1.652(1000+)
LM2598S-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LM2598S-3.3/NOPB的批量USD价格:1.652(1000+)
LM2598S-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LM2598S-5.0/NOPB的批量USD价格:1.652(1000+)
LM2598S-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LM2598S-ADJ/NOPB的批量USD价格:1.652(1000+)
LM2598SX-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LM2598SX-12/NOPB的批量USD价格:1.377(1000+)
LM2598SX-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LM2598SX-3.3/NOPB的批量USD价格:1.377(1000+)
LM2598SX-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LM2598SX-5.0/NOPB的批量USD价格:1.377(1000+)
LM2598SX-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LM2598SX-ADJ/NOPB的批量USD价格:1.377(1000+)
LM2598T-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LM2598T-12/NOPB的批量USD价格:1.377(1000+)
LM2598T-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LM2598T-3.3/NOPB的批量USD价格:1.377(1000+)
LM2598T-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LM2598T-5.0/NOPB的批量USD价格:1.377(1000+)
LM2598T-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LM2598T-ADJ/NOPB的批量USD价格:1.377(1000+)
LM2598_ADJ PSpice Transient Model
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