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