LTC3621EDCB#TRMPBF

LTC3621 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. Typical applications include portable-handheld scanners, industrial and embedded computing, automotive applications and emergency radio.

• 95% maximum efficiency
• Low IQ <lt/> 3.5µA, zero-current shutdown
• Constant frequency (1MHz/2.25MHz)
• Full dropout operation with low IQ
• Frequency 1MHz
• Adjustable output voltage
• Current mode operation for excellent line and load transient response
• Synchronizable to external clock
• 6-lead (2mm × 3mm) plastic DFN package
• Temperature range from -40°C to 125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party