LTC3622

LTC3622/ LTC3622-2/LTC3622-23/5 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current FEATURES DESCRIPTION nn Dual Step-Down Outputs: 1A Per Channel nn Wide VIN Range: 2.7V to 17V nn Wide VOUT Range: 0.6V to VIN nn Up to 95% Efficiency nn No-Load IQ = 5µA with Both Channels Enabled; IQ < 4µA with Only One Channel Enabled nn High Efficiency, Low Dropout Operation (100% Duty Cycle) nn Constant Frequency (1MHz/2.25MHz) with External Frequency Synchronization nn ±1% Output Voltage Accuracy nn Current Mode Operation for Excellent Line and Load Transient Response nn Phase Shift Programmable with External Clock nn Selectable Current Limit nn Internal Compensation and Soft-Start nn Compact 14-Pin DFN (3mm × 4mm) and 16-Lead MSOP Packages APPLICATIONS nn Battery Powered Systems nn Point-of-Load Supplies nn Portable – Handheld Scanners The LTC®3622 is a dual 1A output, high efficiency synchronous monolithic step-down regulator capable of operating from input supplies up to 17V. The switching frequency is fixed to 1MHz or 2.25MHz with a ±50% synchronization range to an external clock. The regulator features ultralow quiescent current and high efficiency over a wide output voltage range. The step-down regulators operate from an input voltage range of 2.7V to 17V and provide an adjustable output from 0.6V to VIN while delivering up to 1A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load effic...