LTC3615

LTC3615/LTC3615-1 Features Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter Description n High Efficiency: Up to 94% n Dual Outputs with 2 × 3A Output Current Capability n Low Output Ripple Burst Mode® Operation: IQ = 130µA n 2.25V to 5.5V Input Voltage Range n ±1% Output Voltage Accuracy n Output Voltages Down to 0.6V n Programmable Slew Rate at Switch Pins n Low Dropout Operation: 100% Duty Cycle n Shutdown Current ≤1µA n Adjustable Switching Frequency Up to 4MHz n Internal or External Compensation n Selectable Pulse-Skipping/Forced Continuous/ Burst Mode Operation with Adjustable Burst Clamp n Optional Active Voltage Positioning (AVP) with Internal Compensation n Selectable 0°/90°/180° (LTC3615) or selectable 140°/180° (LTC3615-1) Phase Shift Between Channels n Fixed Internal and Programmable External Soft-Start n Accurate Start-Up Tracking Capability n DDR Memory Mode IOUT = ±1.5A n Available in 4mm × 4mm QFN-24 and TSSOP-24 Packages Applications n Point-of-Load Supplies n Distributed Power Supplies n Portable Computer Systems n DDR Memory Termination n Handheld Devices The LTC®3615/LTC3615-1 are dual 3A synchronous stepdown regulators using a current mode, constant-frequency architecture. The DC supply current is only 130µA (Burst Mode operation at no-load) while maintaining the output voltages, dropping to zero current in shutdown. The 2.25V to 5.5V input supply range makes the parts ideally suited for single Li-Ion applications. 100% duty cycle capability provid...