Description

High Efficiency Buck + VLDO Regulator Features: High Efficiency, 500mA Buck Plus 300mA VLDO™ Regulator Auto Start-Up Powers VLDO/Linear Regulator Output Prior to Buck Regulator Output Independent High Efciency, 500mA Buck (VIN: 2.7V to 5.5V) 300mA VLDO Regulator with 30mA Standalone Mode No External Schottky Diodes Required Buck Output Voltage Range: 0.8V to 5V VLDO Input Voltage Range (LVIN): 0.9V to 5.5V VLDO Output Voltage Range VLDO: 0.4V to 4.1V Selectable Fixed Frequency, Pulse-Skip Operation or Burst Mode® Operation Short-Circuit Protected Current Mode Operation for Excellent Line and Load Transient Response Constant Frequency Operation: 2.25MHz Low Dropout Buck Operation: 100% Duty Cycle Small, Thermally Enhanced, 10-Lead (3mm × 3mm) DFN Package