LTC3614

Features n 4A Output Current n 2.25V to 5.5V Input Voltage Range n Low Output Ripple Burst Mode® Operation: IQ = 75µA n ±1% Output Voltage Accuracy n Output Voltage Down to 0.6V n High Efficiency: Up to 95% n Low Dropout Operation: 100% Duty Cycle n Programmable Slew Rate on SW Node Reduces Noise and EMI n Adjustable Switching Frequency: Up to 4MHz n Optional Active Voltage Positioning (AVP) with Internal Compensation n Selectable Pulse-Skipping/Forced Continuous/Burst Mode Operation with Adjustable Burst Clamp n Programmable Soft-Start n Inputs for Start-Up Tracking or External Reference n DDR Memory Mode, IOUT = ±3A n Available in a 24-Pin 3mm × 5mm QFN Thermally Enhanced Package Applications n Point-of-Load Supplies n Distributed Power Supplies n Portable Computer Systems n DDR Memory Termination n Handheld Devices LTC3614 4A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter Description The LTC®3614 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture. The no-load DC supply current in sleep mode is only 75µA while maintaining the output voltage (Burst Mode operation) at no load, dropping to zero current in shutdown. The 2.25V to 5.5V input supply voltage range makes the LTC3614 ideally suited for single Li-Ion as well as fixed low voltage input applications. 100% duty cycle capability provides low dropout operation, extending the operating time in battery-powered systems. The operat...