Description

Triple Output, Buck/Buck/Boost Synchronous Controller with 28A Burst Mode IQ Features: Low Operating IQ: 28μA (One Channel On) Dual Buck Plus Single Boost Synchronous Controllers Outputs Remain in Regulation Through Cold Crank Down to 2.5V Wide Bias Input Voltage Range: 4.5V to 38V Buck Output Voltage Range: 0.8V ≤ VOUT ≤ 24V Boost Output Voltage Up to 60V RSENSE or DCR Current Sensing 100% Duty Cycle for Boost Synchronous MOSFET Even in Burst Mode® Operation Phase-Lockable Frequency (75kHz to 850kHz) Programmable Fixed Frequency (50kHz to 900kHz) Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode Operation at Light Loads Very Low Buck Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Low Shutdown IQ: 10μA Small 38-Lead 5mm × 7mm QFN and TSSOP Packages