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LM2991的基本参数
  • 制造厂商:TI
  • 产品类别:电源管理
  • 技术类目:线性和低压降 (LDO) 稳压器
  • 功能描述:具有使能功能的 1A、负电压、可调节超低压降稳压器
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LM2991的产品详情:

The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −3 V to −24 V. The LM2991 provides up to 1 A of load current and features a ON /OFF pin for remote shutdown capability.

The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current and low temperature coefficient precision reference. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with a 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3 V).

The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods. The LM2991 is available in 5-lead TO-220 and DDPAK/TO-263 packages and is rated for operation over the automotive temperature range of −40°C to +125°C. Mil-Aero versions are also available.

LM2991的优势和特性:
  • Output Voltage Adjustable from ?3 V to ?24 V, Typically ?2 V to ?25 V
  • Output Current in Excess of 1 A
  • Dropout Voltage Typically 0.6 V at 1-A Load
  • Low Quiescent Current
  • Internal Short Circuit Current Limit
  • Internal Thermal Shutdown With Hysteresis
  • TTL, CMOS Compatible ON/OFF Switch
  • Functional Complement to the LM2941 Series
LM2991的参数(英文):
  • Output options
  • Adjustable Output, Negative Output
  • Iout (Max) (A)
  • 1
  • Vin (Max) (V)
  • 0.3
  • Vin (Min) (V)
  • -26
  • Vout (Max) (V)
  • -3
  • Vout (Min) (V)
  • -24
  • Noise (uVrms)
  • 200
  • Iq (Typ) (mA)
  • 0.7
  • Thermal resistance θJA (°C/W)
  • 28
  • Rating
  • Catalog
  • Load capacitance (Min) (μF)
  • 1
  • Regulated outputs (#)
  • 1
  • Features
  • Enable
  • Accuracy (%)
  • 5
  • PSRR @ 100 KHz (dB)
  • 22
  • Dropout voltage (Vdo) (Typ) (mV)
  • 600
  • Operating temperature range (C)
  • -40 to 125
LM2991具体的完整产品型号参数及价格(美元):

LM2991的完整型号有:LM2991S/NOPB、LM2991SX/NOPB、LM2991T/LB03、LM2991T/LF03、LM2991T/NOPB、LM2991S、LM2991SX、LM2991T,以下是这些产品的关键参数及官网采购报价:

LM2991S/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991S/NOPB的批量USD价格:1.69(1000+)

LM2991SX/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991SX/NOPB的批量USD价格:1.408(1000+)

LM2991T/LB03,工作温度:PropertyValue,封装:TO-220 (NDH)-5,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LM2991T/LB03的批量USD价格:1.901(1000+)

LM2991T/LF03,工作温度:PropertyValue,封装:TO-220 (NDH)-5,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LM2991T/LF03的批量USD价格:1.408(1000+)

LM2991T/NOPB,工作温度:-40 to 125,封装:TO-220 (KC)-5,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LM2991T/NOPB的批量USD价格:1.408(1000+)

LM2991S,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991S的批量USD价格:2.182(1000+)

LM2991SX,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991SX的批量USD价格:1.901(1000+)

LM2991T,工作温度:-40 to 125,封装:TO-220 (KC)-5,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LM2991T的批量USD价格:1.901(1000+)

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LM2991的评估套件:

LM2991S/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991S/NOPB的批量USD价格:1.69(1000+)

LM2991SX/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991SX/NOPB的批量USD价格:1.408(1000+)

LM2991T/LB03,工作温度:PropertyValue,封装:TO-220 (NDH)-5,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LM2991T/LB03的批量USD价格:1.901(1000+)

LM2991T/LF03,工作温度:PropertyValue,封装:TO-220 (NDH)-5,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LM2991T/LF03的批量USD价格:1.408(1000+)

LM2991T/NOPB,工作温度:-40 to 125,封装:TO-220 (KC)-5,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LM2991T/NOPB的批量USD价格:1.408(1000+)

LM2991S,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991S的批量USD价格:2.182(1000+)

LM2991SX,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-5,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LM2991SX的批量USD价格:1.901(1000+)

LM2991T,工作温度:-40 to 125,封装:TO-220 (KC)-5,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LM2991T的批量USD价格:1.901(1000+)

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