ANALOG DEVICES DC1215A Demonstration Board, LTC3605, Synchronous Buck Converter

DC1215A demonstration circuit is a step-down converter, using the LTC3605 monolithic synchronous buck regulator. DC1215A has a maximum input voltage 15V, and is capable of delivering up to 5A of output current at a minimum input voltage of 4V. The output voltage of the DC1215A can be set as low as 0.6V, the reference voltage of the LTC3605. At low load currents, the DC1215A operates in discontinuous mode, and during shutdown, it consumes less than 10uA of quiescent current. In continuous mode operation, DC1215A is a high efficiency circuit - over 80%. The LTC3605 has phase lock circuits, allowing high current multiphase operation of several DC1215As in parallel. DC1215A can also track another voltage with LTC3605 track function. Because of high switching frequency of LTC3605, which is programmable up to 4 MHz, the DC1215A uses low profile surface mount components. All these features make DC1215A an ideal circuit for use in industrial applications and distributed power systems.

• 2.5V ±4% (2.4V � 2.6V) output voltage VOUT regulation (VIN = 4V to 15V, IOUT = 0A to 5A)
• < 40mVP�P typical output ripple VOUT (VIN = 12V, VOUT = 2.5V, IOUT = 2.5A (20 MHz BW))
• < 2A discontinuous mode at VIN = 12V, VOUT = 2.5V
• 1MHz nominal switching frequency at RT = 162K