LTC3622-2 Datasheet | Linear Technology

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 pensation and Soft-Start nn pact 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 efficiency. Burst Mode® operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest ripple noise. The switching regulators can be synchronized to an external clock. Furthermore, fixed VOUT options are available to eliminate the external feedback resistors. List of LTC3622 Options PART NAME FREQUENCY LTC3622 1.00MHz 2.25MHz LTC3622-23/5 2.25MHZ VOUT Adjustable Adjustable 5V/3.3V All registered trademarks and trademarks are the property...