General Description

The MAX15026 synchronous step-down controller operates from a 4.5V to 28V input voltage range and generates an adjustable output voltage from 85% of the input voltage down to 0.6V while supporting loads up to 25A. The device allows monotonic startup into a prebiased bus without discharging the output and features adaptive internal digital soft-start.

Features

♦ 4.5V to 28V or 5V ±10% Input Supply Range

♦ 0.6V to (0.85 x VIN) Adjustable Output

♦ Adjustable 200kHz to 2MHz Switching Frequency

♦ Ability to Start into a Prebiased Load

♦ Lossless, Cycle-by-Cycle Valley Mode Current Limit with Adjustable, Temperature-Compensated Threshold

♦ Sink-Mode Current-Limit Protection

♦ Adaptive Internal Digital Soft-Start

♦ ±1% Accurate Voltage Reference

♦ Internal Boost Diode

♦ Adaptive Synchronous Rectification Eliminates External Freewheeling Schottky Diode

♦ Hiccup-Mode Short-Circuit Protection

♦ Thermal Shutdown

♦ Power-Good Output and Enable Input for Power Sequencing

♦ ±5% Accurate Enable Input Threshold

♦ AEC-Q100 Qualified (MAX15026B)

Applications

  Set-Top Boxes

  LCD TV Secondary Supplies

  Switches/Routers

  Power Modules

  DSP Power Supplies

  Points-of-Load Regulators