Description

Low Input Voltage, Synchronous Step-Down DC/DC Controller Features: Charge Pump Input Range: 2.7V to 5.5V Controller Input Range: 4V to 38V Integrated Charge Pump Provides 5V Gate Drive to Logic Level MOSFETs RSENSE or DCR Current Sensing ±1.25% Output Voltage Accuracy Over Temperature Phase-Lockable Fixed Frequency: 250kHz to 750kHz Power Good Output Voltage Monitor Adjustable Soft-Start Voltage Ramping Current Foldback Disabled During Start-Up No Reverse Current During Soft-Start Selectable Constant Frequency, Pulse-Skipping, or Burst Mode Operation Output Overvoltage Protection Very Low Dropout Operation: 99% Duty Cycle Available in a 24-Lead (3mm × 5mm) QFN Package