MAX17221ELT+T

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/MAX17221), 500mA (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.

Applications

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

Key features

• 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/MAX17221: 225mA ILIM
• 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 (2x3, 0.4mm Pitch)