MAX20021 Low-Voltage Step Down DC-DC Converters

Analog Devices' MAX20021 family of power management integrated circuits (PMICs) integrates four low-voltage, high-efficiency, step-down DC-DC converters. The four outputs are resistor programmable between 1.0 V to 4.0 V and can provide up to 1.0 A. The PMICs operate from 3.0 V to 5.5 V, making them ideal for point-of-load and post regulation applications.

High-frequency operation allows for an all-ceramic capacitor design and small sized external components. Internal current sensing and loop compensation allows for reduced board space and system cost.

The PMICs offer several important protection features including input overvoltage protection, input undervoltage monitoring, input undervoltage lockout, cycle-by-cycle current limiting, and overtemperature shutdown. The input undervoltage monitor indicates a brownout condition by driving PG_ low when the input falls below the UVM threshold.