
- 制造厂商:TI(德州仪器,Texas Instruments)
- 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:负低压降可调节稳压器
- 点击这里打开及下载LM2991QML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

The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −2V to −25V. The LM2991 provides up to 1A 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 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with a 1A load current and an input-output voltage differential greater than 3V. 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 (VO − VI
The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods.
- 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
- Fixed output options (V)
- 0
- Noise (uVrms)
- 200
- Iq (Typ) (mA)
- 0.7
- Thermal resistance θJA (°C/W)
- 28
- Rating
- Military
- Load capacitance (Min) (F)
- 1
- Regulated outputs (#)
- 1
- Features
- Enable
- Accuracy (%)
- 5
- PSRR @ 100 KHz (dB)
- 22
- Dropout voltage (Vdo) (Typ) (mV)
- 600
- Operating temperature range (C)
- -55 to 125, -40 to 85
LM2991QML的完整型号有:5962-9650502QXA、LM2991 MD8、LM2991 MWC、LM2991GW-QML,以下是这些产品的关键参数及官网采购报价:
5962-9650502QXA,工作温度:-55 to 125,封装:CFP (NAC)-16,包装数量MPQ:42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5962-9650502QXA的批量USD价格:66.199(1000+)
LM2991 MD8,工作温度:-55 to 125,封装: (Y)-0,包装数量MPQ:140个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:Call TI,TI官网LM2991 MD8的批量USD价格:9.448(1000+)
LM2991 MWC,工作温度:-40 to 85,封装: (YS)-0,包装数量MPQ:1个,MSL 等级/回流焊峰值温度:Level-1-NA-UNLIM,引脚镀层/焊球材料:Call TI,TI官网LM2991 MWC的批量USD价格:1.629(1000+)
LM2991GW-QML,工作温度:-55 to 125,封装:CFP (NAC)-16,包装数量MPQ:42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LM2991GW-QML的批量USD价格:66.199(1000+)





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