The MAX15046BAEE+T is a 40V, high performance, synchronous buck controller in 16 pin QSOP package. It generates an adjustable output voltage from 85% of the input voltage down to 0.6V, supporting loads up to 25A. The device allows monotonic start-up into a pre-biased bus without discharging the output and features adaptive internal digital soft-start. The MAX15046's adaptive synchronous rectification eliminates the need for an external freewheeling Schottky diode. The device also utilizes the external low-side MOSFET's on-resistance as a current-sense element, eliminating the need for a current-sense resistor. This protects the DC to DC components from damage during output overloaded conditions or output short circuit faults without requiring a current-sense resistor. The MAX15046 includes a power-good output and an enable input with precise turn-on/turn-off threshold.
Supply voltage range is 4.5V to 40V or 5V ±10%
Operating temperature range from -40°C to 125°C
Adjustable switching frequency (100KHz to 1MHz) with ±10% (1MHz) accuracy
Adaptive internal digital soft-start
Cycle by cycle valley-mode current limit with adjustable, temperature compensated threshold
Monotonic start-up into pre-biased output
±1% accurate voltage reference
Hicc-up mode short circuit protection and overtemperature shutdown
(EN)
