- 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、低压降稳压器
- 点击这里打开及下载LP2954的技术文档资料
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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
LP2954的完整型号有:LP2954IM/NOPB、LP2954IMX/NOPB、LP2954IS/NOPB、LP2954ISX/NOPB、LP2954IT/NOPB,以下是这些产品的关键参数及官网采购报价:
LP2954IM/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LP2954IM/NOPB的批量USD价格:.662(1000+)
LP2954IMX/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LP2954IMX/NOPB的批量USD价格:.56(1000+)
LP2954IS/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LP2954IS/NOPB的批量USD价格:2.291(1000+)
LP2954ISX/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LP2954ISX/NOPB的批量USD价格:2.189(1000+)
LP2954IT/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LP2954IT/NOPB的批量USD价格:1.4(1000+)
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