Description

Dual Constant Frequency Current Mode Step-Down DC/DC Controller Features: High Efficiency: Up to 94% High Output Currents Easily Achieved Wide VIN Range: 2.5V to 9.8V Constant Frequency 550kHz Operation Burst Mode™ Operation at Light Load Low Dropout: 100% Duty Cycle 0.8V Reference Allows Low Output Voltages Current Mode Operation for Excellent Line and Load Transient Response Low Quiescent Current: 270µA (Each Controller) Separate Shutdown Pin for Each Controller Shutdown Mode Draws Only 8µA Supply Current (Each Controller) ±2.5% Reference Accuracy Available in 16-Lead Narrow SSOP Each Controller Functions Independent of the Other