High-efficiency 300 mA step-down DC/DC reference design
The Palo Verde subsystem reference design demonstrates the application of the MAX15062A 60V, 300 mA ultra-small, high-efficiency, synchronous step-down converter. The reference design operates over a wide 4.5V to 60V input voltage range, and provides up to 300 mA at 3.3V output. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The MAX15062A switches at a fixed frequency of 500 kHz, and delivers a peak efficiency of 86.77% with the supplied components when the input is 24V. This general-purpose power solution can be used in many different types of power applications, such as 4–20mA current loops, HVAC and building control, high-voltage LDO replacement, general-purpose point-of-load, etc. In this reference design, the MAX15062 performs in 24V input applications, such as industrial sensors, and process control.
It features;
– Minimal external components and low system cost
– Versatile functionality allows stocking of fewer DC-DC regulators
– Low power dissipation
– Reliable operation in adverse industrial environments
This reference board is designed in a Pmod-compatible form factor with IO pass-through, but can be used in any 4.5V–60V to 3.3V power application up to 300mA. The board is available for purchase.
Maxim Integrated; www.maximintegrated.com/app-notes/index.mvp/id/5815
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