- 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:250mA、30V、高精度、低压降稳压器
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The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).
The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.
The LP2954 with a fixed 5-V output is available in three-pin TO-220 and DDPAK/TO-263 packages. The adjustable LP2954 is provided in an 8-pin, small-outline SOIC package. The adjustable version also provides a resistor network which can be pin strapped to set the output to any voltage from to 1.23 V to 29 V.
Reverse battery protection is provided for the IN pin.
The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.
Output accuracy is ensured at both room temperature and over the entire operating temperature range.
For all available packages, see the orderable addendum at the end of the data sheet.- 5-V Output within 1.2% Over Temperature (A Grade)
- Adjustable 1.23-V to 29-V Output Voltage Available (LP2954IM and LP2954AIM)
- Ensured 250-mA Output Current
- Extremely Low Quiescent Current
- Low Dropout Voltage
- Reverse Battery Protection
- Extremely Tight Line and Load Regulation
- Very Low Temperature Coefficient
- Current and Thermal Limiting
- Pin Compatible with LM2940 and LM340 (5-V Version Only)
- Adjustable Version Adds ERROR Flag to Warn of Output Drop and a Logic-Controlled Shutdown
- Output options
- Adjustable Output, Fixed Output
- Iout (Max) (A)
- 0.25
- Vin (Max) (V)
- 30
- Vin (Min) (V)
- -20
- Vout (Max) (V)
- 29
- Vout (Min) (V)
- 1.23
- Fixed output options (V)
- 5
- Noise (uVrms)
- 80
- Iq (Typ) (mA)
- 0.21
- Thermal resistance θJA (°C/W)
- 44
- Rating
- Catalog
- Load capacitance (Min) (μF)
- 2.2
- Regulated outputs (#)
- 1
- Features
- Enable, Power good
- Accuracy (%)
- 3
- PSRR @ 100 KHz (dB)
- 14
- Dropout voltage (Vdo) (Typ) (mV)
- 800
- Operating temperature range (C)
- -40 to 125
LP2954A的完整型号有:LP2954AIM/NOPB、LP2954AIMX/NOPB、LP2954AIS/NOPB、LP2954AISX/NOPB、LP2954AIT/NOPB、LP2954AIM,以下是这些产品的关键参数及官网采购报价:
LP2954AIM/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LP2954AIM/NOPB的批量USD价格:1.171(1000+)
LP2954AIMX/NOPB,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:2500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LP2954AIMX/NOPB的批量USD价格:1.069(1000+)
LP2954AIS/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LP2954AIS/NOPB的批量USD价格:1.211(1000+)
LP2954AISX/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LP2954AISX/NOPB的批量USD价格:1.11(1000+)
LP2954AIT/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LP2954AIT/NOPB的批量USD价格:1.11(1000+)
LP2954AIM,工作温度:-40 to 125,封装:SOIC (D)-8,包装数量MPQ:95个,MSL 等级/回流焊峰值温度:Level-1-235C-UNLIM,引脚镀层/焊球材料:SNPB,TI官网LP2954AIM的批量USD价格:1.349(1000+)
lp2954a PSpice Transient Model
此参考设计在单个 24 伏直流输入电源中提供绝缘闸极双极型晶体管 (IGBT) 闸极驱动器所需的隔离式正负电压轨。IGBT 在变频驱动器的三相逆变器中用于控制交流电机的转速。此参考设计使用推挽式隔离型控制拓扑,并提供符合 IEC61800-5 标准的隔离,适用于通过预调制 24V 直流输入进行操作。使用调制型(5% 范围内)输入电源,可以通过推挽式 PWM (...)