The MIC2800 is a high performance power management IC, giving three output voltages with maximum efficiency. Integrating a 2MHz DC/DC converter with an LDO post regulator, the MIC2800 gives two high efficiency outputs with a second, 300mA LDO for maximum flexibility. The MIC2800 features a LowQ® mode, reducing the total current draw while in this mode to less than 30µA. In LowQ® mode, the output noise of the DC to DC converter is 75µVRMS, significantly lower than other converters which use a PFM light load mode that can interfere with sensitive RF circuitry.The DC to DC converter uses small values of L and C to reduce board space but still retains efficiencies over 90% at load currents up to 600mA.The MIC2800 is a μCap design, operating with very small ceramic output capacitors and inductors for stability, reducing required board space and component cost.

  2.7V to 5.5V input voltage range

  2MHz DC/DC converter and two stand-alone LDOs

  LDO1: Low input voltage is powered directly from DC/DC converter for highest efficiency

  Integrated power-on reset (OR function for all outputs)

  Adjustable delay time

  LowQ® mode

  30µA Total IQ when in LowQ® mode

DC to DC Converter

  Output current to 600mA in PWM mode

  LowQ® Mode: no noise light load mode

  75µVRMS output noise in LowQ® mode

  2 MHz PWM operation in normal mode

  >90% efficiency

LDOs

  LDO1 input voltage directly connected to DC/DC converter output voltage for maximum efficiency

  Ideal for 1.8V to 1.5V conversion

  300mA output current from 1.8V input

  Output voltage down to 0.8V

  LDO2: 300mA output current capable

  Thermal Shutdown Protection

  Current Limit Protection