MIC2285A中文资料8MHz 600mA Synchronous Buck Regulator w/LowQ® Mode数据手册Microchip规格书

描述 Description

The MIC2285A is a high efficiency 8MHz PWM synchronous buck (step-down) regulator that features a LowQ® LDO standby mode that draws only 18µA of quiescent current. The MIC2285A allows an ultra-low noise, small size, and high efficiency solution for portable power applications. In PWM mode, the MIC2285A operates with a constant frequency 8MHz PWM control. Under light load conditions, such as in system sleep or standby modes, the PWM switching operation can be disabled to reduce switching losses. In this light load LowQ® mode, the LDO maintains the output voltage and draws only 18µA of quiescent current. The LDO mode of operation saves battery life while not introducing spurious noise and high ripple as experienced with pulse skipping or bursting mode regulators. The MIC2285A operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

特性 Features

• Light load LowQ® LDO mode
• 8MHz PWM mode
• Adjustable output voltage option down to 1V
• Ultra-fast transient response
• Requires only a 0.47µH inductor
• Enables sub 0.55mm profile solution
• Fully integrated MOSFET switches
• Micropower shutdown
• Thermal shutdown and current limit protection
• -40°C to +125°C junction temperature range

简介

MIC2285A属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的MIC2285A稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。