Analog Devices LTC3621

Description

The LTC®3621/LTC3621-2 is a high efficiency 17V, 1A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz or 2.25MHz. The regulator features ultralow quiescent current and high efficienciesover 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.

Features

• Wide VIN Range: 2.7V to 17V
• Wide VOUT Range: 0.6V to VIN
• 95% Max Efficiency
• Low IQ < 3.5µA, 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
• Pulse-Skipping, Forced Continuous, Burst Mode® Operation
• Internal Compensation and Soft-Start
• Overtemperature Protection
• Compact 6-Lead DFN (2mm × 3mm) Package or 8-Lead MSOPE Package with Power Good Output and Independent SGND Pin

Remarks:Refer page no.12 for Inductor Selection Table.

Typical applications

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

More information

• Datasheet
• IC product information