LTC3621IDCB-2#TRMPBF

The LTC3621/LTC3621 - 2 is a high efficiency 17V, 1A synchronous monolithic step - down regulator. The switching frequency is fixed to 1MHz or 2.25MHz with a ±40% synchronizing range. The regulator features ultralow quiescent current and high efficiencies over a wide VOUT range. The step - down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range 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 voltage ripple. The MODE pin can also be used to allow the user to sync the switching frequency to an external clock.

Applications

• Portable - Handheld Scanners
• Industrial and Embedded Computing
• Automotive Applications
• Emergency Radio

Key features

• Wide VIN Range: 2.7V to 17V
• Wide VOUT Range: 0.6V to VIN
• 95% Max Efficiency
• Low 3.5µA Quiescent Current, Zero - Current Shutdown
• Constant Frequency (1MHz/2.25MHz)
• Full Dropout Operation with Low IQ
• 1A Rated Output Current
• ±1% Output Voltage Accuracy
• Current Mode Operation for Excellent Line and Load Transient Response
• Synchronizable to External Clock
• Pulse - Skipping, Forced Continuous, Burst Mode Operation
• Internal Compensation and Soft - Start
• Overtemperature Protection
• Compact 6 - Lead DFN (2mm×3mm) Package or Thermally - Enhanced MS8E Package with Power Good Output and Independent SGND Pin