MCP1725中文资料500mA CMOS LDO w/ Power Good & Shutdown数据手册Microchip规格书

描述 Description

The MCP1725 is a 500mA Low Dropout (LDO) linear regulator that provides high current and low output voltages in a very small package. The MCP1725 comes in a fixed (or adjustable) output voltage version, with an output voltage range of 0.8V to 5.0V. The 500mA output current capability, combined with the low output voltage capability, make the MCP1725 a good choice for new sub-1.8V output voltage LDO applications that have high current demands.The MCP1725 is stable using ceramic output capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator solution. Only 1µF of output capacitance is needed to stabilize the LDO.Using CMOS construction, the quiescent current consumed by the MCP1725 is typically less than 120µA over the entire input voltage range, making it attractive for portable computing applications that demand high output current. When shut down, the quiescent current is reduced to less than 0.1µA.The scaled-down output voltage is internally monitored and a power good (PWRGD) output is provided when the output is within 92% of regulation (typical). An external capacitor can be used on the CDELAY pin to adjust the delay from 200µs to 300ms. The overtemperature and short circuit current-limiting provide additional protection for the LDO during system fault conditions.

特性 Features

Up to 500 mA output load current
Low dropout voltage: 210 mV typical at 500 mA
Output voltage from 0.8V to 5.0V, both fixed and adjustable
Stable with 1.0 µF ceramic output capacitor
Power good output with adjustable delay
Low supply current: 120 µA (typ)
Low shutdown current: 0.1 µA (typ)
DFN-8 2x3 and SOIC-8 Pb-free packages

简介

MCP1725属于集成电路（IC）的线性+开关稳压器。由Microchip制造生产的MCP1725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。