- 制造厂商:TI
- 产品类别:电源管理
- 技术类目:直流/直流开关稳压器 - 降压稳压器
- 功能描述:高频 1.5A 负载 - 降压直流/直流稳压器
- 点击这里打开及下载LM2831的技术文档资料
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The LM2831 regulator is a monolithic, high-frequency, PWM step-down DC-DC converter in a 5-pin SOT-23 and a 6-Pin WSON package. The LM2831 provides all the active functions to provide local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM2831 is easy to use. The ability to drive 1.5-A loads with an internal 130-mΩ PMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. The world-class control circuitry allows on-times as low as 30 ns, thus supporting exceptionally high frequency conversion over the entire 3 V to 5.5 V input operating range, down to the minimum output voltage of 0.6 V. Switching frequency is internally set to 550 kHz, 1.6 MHz, or 3 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies of up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA. The LM2831 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.
- Space-Saving SOT-23 Package
- Input Voltage Range of 3 V to 5.5 V
- Output Voltage Range of 0.6 V to 4.5 V
- 1.5-A Output Current
- High Switching Frequencie
- 1.6 MHz (LM2831X)
- 0.55 MHz (LM2831Y)
- 3 MHz (LM2831Z)
- 130-mΩ PMOS Switch
- 0.6-V, 2% Internal Voltage Reference
- Internal Soft Start
- Current Mode, PWM Operation
- Thermal Shutdown
- Overvoltage Protection
- Vin (Min) (V)
- 3
- Vin (Max) (V)
- 5.5
- Vout (Min) (V)
- 0.6
- Vout (Max) (V)
- 4.5
- Iout (Max) (A)
- 1.5
- Iq (Typ) (uA)
- 2800
- Switching frequency (Min) (kHz)
- 550
- Switching frequency (Max) (kHz)
- 3000
- Features
- Enable, Light Load Efficiency
- Rating
- Catalog
- Regulated outputs (#)
- 1
- Control mode
- Current Mode
- Duty cycle (Max) (%)
- 94
LM2831的完整型号有:LM2831XMF/NOPB、LM2831XMFX/NOPB、LM2831XSD/NOPB、LM2831XSDX/NOPB、LM2831YMF/NOPB、LM2831YMFX/NOPB、LM2831YSD/NOPB、LM2831ZMF/NOPB、LM2831ZSD/NOPB、LM2831XSD,以下是这些产品的关键参数及官网采购报价:
LM2831XMF/NOPB,工作温度:-40 to 125,封装:SOT-23 (DBV)-5,包装数量MPQ:1000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LM2831XMF/NOPB的批量USD价格:.878(1000+)
LM2831XMFX/NOPB,工作温度:-40 to 125,封装:SOT-23 (DBV)-5,包装数量MPQ:3000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LM2831XMFX/NOPB的批量USD价格:.732(1000+)
LM2831XSD/NOPB,工作温度:-40 to 125,封装:WSON (NGG)-6,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2831XSD/NOPB的批量USD价格:.878(1000+)
LM2831XSDX/NOPB,工作温度:-40 to 125,封装:WSON (NGG)-6,包装数量MPQ:4500个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2831XSDX/NOPB的批量USD价格:.732(1000+)
LM2831YMF/NOPB,工作温度:-40 to 125,封装:SOT-23 (DBV)-5,包装数量MPQ:1000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LM2831YMF/NOPB的批量USD价格:.878(1000+)
LM2831YMFX/NOPB,工作温度:-40 to 125,封装:SOT-23 (DBV)-5,包装数量MPQ:3000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LM2831YMFX/NOPB的批量USD价格:.732(1000+)
LM2831YSD/NOPB,工作温度:-40 to 125,封装:WSON (NGG)-6,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2831YSD/NOPB的批量USD价格:.732(1000+)
LM2831ZMF/NOPB,工作温度:-40 to 125,封装:SOT-23 (DBV)-5,包装数量MPQ:1000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LM2831ZMF/NOPB的批量USD价格:.732(1000+)
LM2831ZSD/NOPB,工作温度:-40 to 125,封装:WSON (NGG)-6,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM2831ZSD/NOPB的批量USD价格:.732(1000+)
LM2831XSD,工作温度:-40 to 125,封装:WSON (NGG)-6,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SNPB,TI官网LM2831XSD的批量USD价格:.988(1000+)
LM2831X PSpice Transient Model
PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。借助?PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。
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PMP9487 — 用于信息娱乐系统中的汽车仪表板的 CISPR 25 5 类额定功率多路输出电源
PMP9487 是采用 LM5001 稳压器 IC(用作 SEPIC)、LM46002(用作降压)和 LM2831Y 稳压器 IC(用作降压)的传导 EMI 优化 (CISPR 25) 8W SEPIC 转换器,适用于广泛输入电压汽车信息娱乐仪表盘应用。此设计接受 6.5Vin 至 20Vin 输入电压,可提供 12V (250mA)、3.3V (1.2A) 和 1.8V (500mA) 输出。此器件采用小型尺寸,是使用升压转换器和线性稳压器的价格低廉且更高效的解决方案。在汽车仪表盘中,整个电源树设计只使用一个差分滤波器。