The MAX15046 from Maxim Semiconductor is a synchronous buck regulator 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.
This synchronous buck regulator circuit project can be useful in applications like : industrial Power Supplies , 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 this IC require a 24 volts input and is provide an 3.3 volts output .