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Maxim Integrated MAX17221

400mV to 5.5V Input, nanoPower Synchronous Boost Converter with True Shutdown


TopologyBoost Converter
Input voltage2.7-4.2 V
Output 15 V / 0.19 A
Output 23.3 V / 0.26 A


The MAX17220–MAX17225 is a family of ultra-lowquiescent current boost (step-up) DC-DC converters witha 225mA/0.5A/1A peak inductor current limit and TrueShutdown™. True Shutdown disconnects the output fromthe input with no forward or reverse current. The outputvoltage is selectable using a single standard 1% resistor.The 225mA (MAX17220), 500mA (MAX17221/MAX17222/MAX17223), and 1A (MAX17224/MAX17225) peak inductorcurrent limits allow flexibility when choosing inductors. TheMAX17220/MAX17222/MAX17224 versions have poststartupenable transient protection (ETP), allowing theoutput to remain regulated for input voltages down to400mV, depending on load current. The MAX17220–MAX17225 offer ultra-low quiescent current, small totalsolution size, and high efficiency throughout the entire loadrange. The MAX17220–MAX17225 are ideal for batteryapplications where long battery life is a must


300nA Quiescent Supply Current Into OUT● True Shutdown Mode

  • 0.5nA Shutdown Current
  • Output Disconnects from Input
  • No Reverse Current with VOUT 0V to 5V● 95% Peak Efficiency● 400mV to 5.5V Input Range● 0.88V Minimum Startup Voltage● 1.8V to 5V Output Voltage Range
  • 100mV/Step
  • Single 1% Resistor Selectable Output● 225mA, 500mA, and 1A Peak Inductor Current Limit
  • MAX17220: 225mA ILIM
  • MAX17221/MAX17222/MAX17223: 500mA ILIM
  • MAX17224/MAX17225: 1A ILIM● MAX17220/MAX17222/MAX17224 Enable TransientProtection (ETP)● 2mm x 2mm 6-Pin μDFN● 0.88mm x 1.4mm 6-Bump WLP (2 x 3, 0.4mm Pitch)

Typical applications

  • Supercapacitor Backup for RTC/Alarm Buzzers
  • Primary-Cell Portable Systems,Secondary-Cell Portable Systems
  • Tiny, Low-Power IoT Sensors
  • Optical Heart-Rate Monitoring (OHRM) LED Drivers
  • Low-Power Wireless Communication Products
  • Battery-Powered Medical Equipment
  • Wearable Devices