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- 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
- 点击这里打开及下载LM2991的技术文档资料
- TI代理渠道,提供当日发货、严格的质量标准,满足您的目标价格
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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.
- 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
- 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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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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