Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

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