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The MAX15046 introduced by Maxim Semiconductor is a synchronous step-down controller IC that operates over a wide range input voltage from 4.5V to 40V . The Max15046 can provide an adjustable output voltage from 85% of the input voltage down to 0.6V, supporting loads up to 25A.
The switching frequency can be adjusted from 100kHz to 1MHz with an external resistor. The MAX15046’s adaptive synchronous rectification eliminates the need for an external freewheeling Schottky diode. As a current-sense element the MAX15046 utilizes external low-side MOSFET’s on-resistance, eliminating the need for a current-sense resistor.
The MAX15046 can be useful in applications like : basestations , Industrial Power Supplies (PLC, Industrial Computers, Fieldbus Components, Fieldbus Couplers) , Telecom Power Supplies and other power circuits .
The design of circuit is not complicate requiring few external components and offering many features like : 4.5V to 40V or 5V ±10% voltage range , Adjustable Outputs from 0.85 x VIN down to 0.6V , adjustable switching frequency (100kHz to 1MHz) with ±10% (1MHz) accuracy , adaptive internal digital Soft-Start , up to 25A output capability , cycle-by-cycle valley-mode current limit with adjustable, ±1% accurate voltage reference , hiccup-mode short-circuit protection (Patent-Pending Architecture) , overtemperature shutdown .
The power supply presented in this schematic circuit based on the MAX15046 IC require a 24 input voltage an is provide an 3.3 volts output voltage .
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