MAX17220 – MAX17225 nanoPower Synchronous Boost Converter with True Shutdown

The MAX17220–MAX17225 is a family of ultra-low quiescent current boost (step-up) DC-DC converters with a 225mA/0.5A/1A peak inductor current limit and True Shutdown™. True Shutdown disconnects the output from the input with no forward or reverse current. The output voltage is selectable using a single standard 1% resistor. The 225mA (MAX17220), 500mA (MAX17221/MAX17222/MAX17223), and 1A (MAX17224/MAX17225) peak inductor current limits allow flexibility when choosing inductors. The MAX17220/MAX17222/MAX17224 versions have post-startup enable transient protection (ETP), allowing the output to remain regulated for input voltages down to 400mV, depending on load current. The MAX17220–MAX17225 offer ultra-low quiescent current, small total solution size, and high efficiency throughout the entire load range. The MAX17220–MAX17225 are ideal for battery applications where long battery life is a must.

Diagram nr 1. MAX17220, MAX17221, MAX17222, MAX17223, MAX17224, MAX17225: Typical Operating Circuit

Kluczowe cechy układu:

  • 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 Transient Protection (ETP)
  • 2mm x 2mm 6-Pin μDFN
  • 0.88mm x 1.4mm 6-Bump WLP (2 x 3, 0.4mm Pitch)

Kluczowe aplikacje układu:

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

 

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