Compact synchronous step-down buck converter with integrated switches

The Maxim MAX77596 step-down buck converter is now stocked by Mouser. The compact synchronous buck converter, with integrated switches, is designed to deliver up to 300mA with input voltages from 3.5V to 24V. This is achieved while using only 1.1µA quiescent current at no load (fixed-output version). Applications include point-of-load (PoL), portable devices powered from Li+ batteries and USB Type-C devices. Voltage quality can be monitored by observing the active-low RESET signal. The device can operate near dropout by running at 98% duty cycle. This makes it ideal for battery-powered applications. The device offers a fixed 3.3V output version, as well as an adjustable version. The adjustable version allows the user to program the output voltage between 1V and 10V by using a resistor-divider. Frequency is fixed at 1.7MHz, which allows for small external components and reduced output ripple. The device offers both forced-PWM and skip modes of operation, with ultra-low quiescent current of 1.1µA in skip mode. Also available from stock, the MAX77596EVKIT evaluation kit demonstrates the MAX77596 synchronous step-down converter IC with integrated switches. The evaluation kit operates over a wide input range of 3.5V to 24V and can support loads up to 300mA.