Electronic Component Solutions

Ultra-Low 500nA IQ, Wide Input 2V to 5.5V, 700mA Step-Down Regulator

The MP28301 is a monolithic power management unit containing a 700mA, high-efficiency, step-down, switching converter and a 100mA LDO regulator. The nA quiescent current provides extremely high efficiency when the load current is in the µA range. With the minimum input voltage as low as 2V, the MP28301 allows the system to operate directly from the battery.

The constant-on-time (COT) control scheme provides fast transient response and high light-load efficiency, and requires minimal capacitance. The regulation is made tight by integrating an error amplifier to correct the output voltage.

Features & Benefits:

  • 700mA Buck Switcher
    – Ultra-Low IQ: 500nA
    – Wide 2.0V to 5.5V Operating Input Range
    – Seven Selectable Output Voltages
    – Up to 700mA Output Current
    – 1.5MHz Switching Frequency in Continuous Conduction Mode (CCM)
    – 100% Duty Cycle in Dropout Mode
    – 0.25Ω and 0.25Ω Internal Power MOSFET Switches
    – Cycle-by-Cycle Over-Current Protection (OCP)
    – Short-Circuit Protection (SCP) with Hiccup Mode
  • 100mA LDO
    – Ultra-Low IQ: 300nA
    – 2.0V to 5.5V Operating Input Range
    – Three Selectable Output Voltages
    -Over-Temperature Protection (OTP)
  • Available in a QFN-12 (2mmx2mm) Package


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