Analog Devices LTC3624

Description

The LTC®3624/LTC3624-2 is a high efficiency 17V, 2A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz (LTC3624) or 2.25MHz (LTC3642-2) with a ±40% synchronization range. The regulator features ultralow quiescent current and high efficiency 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 2A 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 sync the switching frequency to an external clock.

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)
• Fixed VOUT Options Available
• Low Dropout Operation (100% Duty Cycle) with Ultralow IQ
• 2A 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 8-Lead DFN (3mm × 3mm) Package

Remarks:Table 1. Inductor Selection TableRefer page no.13

Typical applications

• Emergency Radios
• Battery Powered Equipment
• Portable Instrumentation
• General Purpose Step-Down Supplies

More information

• Datasheet
• IC product information