Description

The LTC3407-2 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ?1.2mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35?, 1.2A power switches provide high efficiency without the need for external Schottky diodes.A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode? operation provides high efficiency at light loads, while Pulse Skip Mode provides low noise ripple at light loads.To further maximize battery life, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40?A. In shutdown, the device draws <1?A. IOUT FSW Features LTC3407 2x 600mA 1.5MHz LTC3407-2 2x 800mA 2.25MHz LTC3407-3 2x 800mA 2.25MHz Fixed 1.8V/3.3V LTC3407-4 2x 800mA 2.25MHz Reduce POR Delay LTC3407A 2x 600mA 1.5MHz Low Ripple Burst Mode LTC3407A-2 2x 800mA 2.25MHz Low Ripple Burst Mode APPLICATIONS PDAs/Palmtop PCs Digital Cameras Cellular Phones Portable Media Players PC Cards Wireless and DSL Modems

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Part number: DC734A

More details from Analog Devices Inc.