Micrel MIC2826四输出可编电源管理方案

Micrel公司的MIC2826是四输出可编程电源管理集成电路(PMIC),最适合用作移动应用处理器,协处理器,DSP,GPS和媒体播放器芯片组的高效电源. MIC2826集成了一个4MHz 500mA PWM/PFM同步降压稳压器和三个LDO稳压器(每个输出150mA)以及提供用于编程的400kHz I2C接口.本文介绍了MIC2826主要特性,方框图,以及在GPS子系统的应用电路, MIC2826 评估板电路图和材料清单(BOM).

The Micrel MIC2826 is a four output, programmable Power Management IC, optimized for high efficiency power support in Mobile Application Processors, Co-Processors, DSPs, GPS and Media Player chipsets. The device integrates a single 500mA PWM/PFM synchronous buck (step-down) regulator with three Low Dropout Regulators and a 400kHz I²C interface that provides programmable Dynamic Voltage Scaling (DVS), Power Sequencing, and individual output Enable/Disable controls allowing the user to optimally control all four outputs.

The 4MHz synchronous buck regulator features a patented HyperLight Load™ (HLL) architecture which minimizes switching losses and provides low quiescent current operation for high efficiency at light loads. Additional benefits of this proprietary architecture are low output ripple voltage and fast transient response throughout the entire load range with the use of small output capacitors, reducing the overall system size...

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