DC2113A

DC2113A is a demonstration circuit featuring the LTC®3649. This is a high input voltage, high efficiency synchronous monolithic buck converter. The DC2113A has wide input voltage range from 3.1V up to 60V. The output voltage of the DC2113A can be set as to 3.3V or 5V. However, “USER SELECT” option of DC2113A allows output voltage to be as high as input voltage minus 0.5V, with certain modifications. DC2113A is capable of delivering up to 4A of output current. DC2113A supports three operation modes: Fixed-frequency modulation, Burst Mode® operation and the user can synchronize it with external clock also. Fixed-Frequency mode of operation maximizes the output current, reduces output voltage ripple, and yields a low noise switching spectrum. Burst Mode operation employs a variable frequency switching algorithm that minimizes the no-load input quiescent current and improves efficiency at light loads.

• 500kHz preset operating frequency at R10 = 200kohm
• 97% efficiency at VIN = 12V, VOUT = 5V, IOUT = 4A
• Typical output ripple VOUT is less than 15mVP-P at VIN = 12V, VOUT = 5V, IOUT = 4A (20MHz BW)
• Quiescent current at shutdown is less than 14µA (VIN = 4V – 60V)
• Input current at no load is less than 430µA (VIN = 4V – 60V, burst mode operation)