MCP1812中文资料300 mA Ultra-Low Iq LDO数据手册Microchip规格书

描述 Description

The MCP1811/12 devices are 150 mA (MCP1811) and 300 mA (MCP1812) low dropout (LDO) linear regulators that provide high-current and low-output voltages while maintaining an ultra-low 250 nA of quiescent current during device operation. In addition, the MCP1811B/12B can be shut down for 5 nA (typical) supply current draw.The MCP1811/12 family comes in nine standard fixed output-voltage versions: 1V, 1.2V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 4.0V. The 150/300 mA output current capability, combined with the low output-voltage capability, make the MCP1811/12 device family a good choice for new ultra-long-life LDO applications that have high-current demands, but require ultra-low power consumption during sleep periods.The MCP1811/12 is stable with ceramic output capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator solution. Only 1 μF (2.2 μF for MCP1812) of output capacitance is needed to assure the stability of the system with a low noise output.The MCP1811/12 can be paired with other ultra-low current devices, such as Microchip’s nanoWatt eXtreme Low Power (XLP) technology devices, for a complete ultra-low-power solution.

特性 Features

Ultra-Low Quiescent Current: 250 nA (typical)
Ultra-Low Shutdown Supply Current: 10 nA typ (MCP1812A) and 5 nA typ (MCP1812B)
Input Voltage Range: 1.8V to 5.5V
Standard Output Voltages: 1.0V, 1.2V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 4.0V
Constant Low Dropout Voltage: 550 mV (typical) w/ Small Variation
Stable with Ceramic Output Capacitor: 2.2 uF
Overcurrent Protection w/ Foldback
Output Discharge (MCP1812A)
Available in 3 and 5 lead SOT-23, 3 and 5 lead SC70, 4 lead 1x1mm UDFN

简介

MCP1812属于集成电路（IC）的线性+开关稳压器。由制造生产的MCP1812稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。