Maxim Integrated MAX38650 nanoPower Buck Converter

Maxim Integrated MAX38650 nanoPower Buck Converter


Maxim Integrated MAX38650 nanoPower Buck Converter provides an ultra-low 390nA quiescent current and operates from a 1.8V to 5.5V input voltage. The MAX38650 supports load currents of up to 100mA with peak efficiencies of 95%. The MAX38650 offers high efficiency throughout the load range with a small total solution size. The device is ideal for battery applications where extended battery life is required.

The Maxim MAX38650 nanoPower Buck Converter supports 100% duty cycle operation allowing seamless transition as battery discharges and falls below the target output voltage. The MAX38650 utilizes a unique control scheme that allows ultra-low quiescent current and high efficiency over a wide output current range.

The MAX38650 Converter is offered in a space-saving, 1.58mm x 0.89mm, 6-pin wafer-level package (WLP) (2 x 3 bumps, 0.4mm pitch), and is specified over the -40°C to +125°C operating temperature range.


  • Extends battery life
    • 390nA Ultra-low quiescent supply current
    • 5nA Shutdown current
    • 95% Peak efficiency and over 85% at 10µA
  • Easy to use addresses popular operation
    • 1.8V to 5.5V Input Range
    • Single resistor-adjustable VOUT from 1.2V to 3.3V (MAX38650A)
    • Preprogrammed VOUT from 1.2V to 5V (MAX38650B) in steps of 50mV
    • 100% Duty cycle mode for low dropout operation
    • ±1.5% Output voltage accuracy
    • 100mA Load current
  • Protects system in multiple use cases
    • Reverse-current blocking in shutdown
    • Active discharge feature
  • Reduces size and increases reliability
    • -40°C to +125°C Operating temperature range
    • 1.58mm x 0.89mm, 0.4mm pitch, 6-pin (2 x 3) WLP

Application schematic

more information:

Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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