- 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:1A、负低压降稳压器
- 点击这里打开及下载LM2990的技术文档资料
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The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V.
The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. 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 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). Output voltage accuracy is ensured to ±5% over load and temperature extremes.
The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time.
All these features make the LM2990 an ideal negative power supply suited for dual supply systems. The device may also be used as fixed or adjustable current sink load.
The LM2990 is available in two 3-pin packages and is rated for operation over the junction temperature range of −40°C to 125°C.
- Input Voltage: –26 V to –6 V
- Fixed Output Voltages: ?5 V, ?5.2 V, ?12 V, and ?15 V
- 5% Output Accuracy over Entire Operating Range
- 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
- Functional Complement to the LM2940 Series
- Output options
- Fixed Output, Negative Output
- Iout (Max) (A)
- 1
- Vin (Max) (V)
- -6
- Vin (Min) (V)
- -26
- Vout (Max) (V)
- -5
- Vout (Min) (V)
- -15
- Fixed output options (V)
- -5, -5.2, -12, -15
- Noise (uVrms)
- 250
- Iq (Typ) (mA)
- 1
- Thermal resistance θJA (°C/W)
- 23
- Rating
- Catalog
- Load capacitance (Min) (μF)
- 10
- Regulated outputs (#)
- 1
- Features
- —
- Accuracy (%)
- 4.9
- PSRR @ 100 KHz (dB)
- 23
- Dropout voltage (Vdo) (Typ) (mV)
- 600
- Operating temperature range (C)
- -40 to 125
LM2990的完整型号有:LM2990S-12/NOPB、LM2990S-15/NOPB、LM2990S-5.0、LM2990S-5.0/NOPB、LM2990SX-12/NOPB、LM2990SX-15/NOPB、LM2990SX-5.0、LM2990SX-5.0/NOPB、LM2990T-12/NOPB、LM2990T-15/NOPB、LM2990T-5.0/NOPB、LM2990T-5.2/NOPB、LM2990S-12、LM2990S-15、LM2990SX-12、LM2990SX-15、LM2990T-12、LM2990T-15、LM2990T-5.0,以下是这些产品的关键参数及官网采购报价:
LM2990S-12/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-12/NOPB的批量USD价格:1.656(1000+)
LM2990S-15/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-15/NOPB的批量USD价格:1.656(1000+)
LM2990S-5.0,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-5.0的批量USD价格:1.928(1000+)
LM2990S-5.0/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-5.0/NOPB的批量USD价格:1.656(1000+)
LM2990SX-12/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-12/NOPB的批量USD价格:1.383(1000+)
LM2990SX-15/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-15/NOPB的批量USD价格:1.383(1000+)
LM2990SX-5.0,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-5.0的批量USD价格:1.656(1000+)
LM2990SX-5.0/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-5.0/NOPB的批量USD价格:1.383(1000+)
LM2990T-12/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-12/NOPB的批量USD价格:1.363(1000+)
LM2990T-15/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-15/NOPB的批量USD价格:1.363(1000+)
LM2990T-5.0/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-5.0/NOPB的批量USD价格:1.363(1000+)
LM2990T-5.2/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-5.2/NOPB的批量USD价格:1.363(1000+)
LM2990S-12,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-12的批量USD价格:2.133(1000+)
LM2990S-15,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-15的批量USD价格:2.133(1000+)
LM2990SX-12,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-12的批量USD价格:1.86(1000+)
LM2990SX-15,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-15的批量USD价格:1.86(1000+)
LM2990T-12,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-12的批量USD价格:1.84(1000+)
LM2990T-15,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-15的批量USD价格:1.84(1000+)
LM2990T-5.0,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-5.0的批量USD价格:1.84(1000+)
LM2990S-12/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-12/NOPB的批量USD价格:1.656(1000+)
LM2990S-15/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-15/NOPB的批量USD价格:1.656(1000+)
LM2990S-5.0,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-5.0的批量USD价格:1.928(1000+)
LM2990S-5.0/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-5.0/NOPB的批量USD价格:1.656(1000+)
LM2990SX-12/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-12/NOPB的批量USD价格:1.383(1000+)
LM2990SX-15/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-15/NOPB的批量USD价格:1.383(1000+)
LM2990SX-5.0,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-5.0的批量USD价格:1.656(1000+)
LM2990SX-5.0/NOPB,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-5.0/NOPB的批量USD价格:1.383(1000+)
LM2990T-12/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-12/NOPB的批量USD价格:1.363(1000+)
LM2990T-15/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-15/NOPB的批量USD价格:1.363(1000+)
LM2990T-5.0/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-5.0/NOPB的批量USD价格:1.363(1000+)
LM2990T-5.2/NOPB,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-5.2/NOPB的批量USD价格:1.363(1000+)
LM2990S-12,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-12的批量USD价格:2.133(1000+)
LM2990S-15,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990S-15的批量USD价格:2.133(1000+)
LM2990SX-12,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-12的批量USD价格:1.86(1000+)
LM2990SX-15,工作温度:-40 to 125,封装:DDPAK/TO-263 (KTT)-3,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LM2990SX-15的批量USD价格:1.86(1000+)
LM2990T-12,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-12的批量USD价格:1.84(1000+)
LM2990T-15,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-15的批量USD价格:1.84(1000+)
LM2990T-5.0,工作温度:-40 to 125,封装:TO-220 (NDE)-3,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LM2990T-5.0的批量USD价格:1.84(1000+)