Analog Devices MAX17221

Description

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

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: 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

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

More information

• Datasheet
• IC product information