- 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：具有高精度和电源正常指示功能的 250mA、30V、低压降稳压器
- 点击这里打开及下载LP2957A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 LP2957 is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current (150 µA typical at 1 mA load), and very low dropout voltage (470 mV typical at 250 mA load current).
Output can be wired for snap-on/snap-off operation to eliminate transition voltage states where µP operation may be unpredictable.
Output crowbar (50 mA typical pull-down current) will bring down the output quickly when the regulator snaps off or when the shutdown function is activated.
The part has tight line and load regulation (0.04% typical) and low output temperature coefficient (20 ppm/°C typical).
The accuracy of the 5V output is ensured at room temperature and over the full operating temperature range.
The LP2957 is available in the five-lead TO-220 and DDPAK/TO-263 packages.
- 5V Output within 1.4% Over Temperature (A Grade)
- Easily Programmed for Snap-On/Snap-Off Output
- Ensured 250mA Output Current
- Extremely Low Quiescent Current
- Low Input-Output Voltage Required for Regulation
- Reverse Battery Protection
- Extremely Tight Line and Load Regulation
- Very Low Temperature Coefficient
- Current and Thermal Limiting
- Error Flag Signals when Output is out of Regulation
All trademarks are the property of their respective owners.
- Output options
- Fixed Output
- Iout (Max) (A)
- 0.25
- Vin (Max) (V)
- 30
- Vin (Min) (V)
- -20
- Vout (Max) (V)
- 5
- Vout (Min) (V)
- 5
- Fixed output options (V)
- 5
- Noise (uVrms)
- 320
- Iq (Typ) (mA)
- 0.15
- Thermal resistance θJA (°C/W)
- 60
- 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)
- 470
- Operating temperature range (C)
- -40 to 125
LP2957A的完整型号有：LP2957AISX/NOPB、LP2957AIT/NOPB，以下是这些产品的关键参数及官网采购报价：
LP2957AISX/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LP2957AISX/NOPB的批量USD价格：1.583（1000+）
LP2957AIT/NOPB，工作温度：-40 to 125，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LP2957AIT/NOPB的批量USD价格：1.583（1000+）
LP2957AISX/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LP2957AISX/NOPB的批量USD价格：1.583（1000+）
LP2957AIT/NOPB，工作温度：-40 to 125，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LP2957AIT/NOPB的批量USD价格：1.583（1000+）
