LTC3716

LTC3716 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator FEATURES s DESCRIPTIO s s s s s s s s s s s s s s s U APPLICATIO S s Output Stages Operate Antiphase Reducing Input and Output Capacitance Requirements and Power Supply Induced Noise Dual Input Supply Capability for Load Sharing 5-Bit Mobile VID Code: VOUT = 0.6V to 1.75V ±1% Output Voltage Accuracy True Remote Sensing Differential Amplifier Power Good Output Voltage Monitor Supports Active Voltage Positioning Current Mode Control Ensures Current Sharing OPTI-LOOPTM Compensation Minimizes COUT Three Operational Modes: PWM, Burst and Cycle Skip Programmable Fixed Frequency: 150kHz to 300kHz Wide VIN Range: 4V to 36V Operation Adjustable Soft-Start Current Ramping Internal Current Foldback and Short-Circuit Shutdown Overvoltage Soft Latch Eliminates Nuisance Trips Available in 36-Lead Narrow SSOP Package The LTC®3716 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives two N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at an optimum frequency for efficiency. Thermal design is also simplified. An operating m...