DC2898A

DC2898A demonstration circuit is a dual DC/DC converter with a 13V to 40V input voltage range, two 12V outputs at 4A each featuring the LTM®4655. The LTM4655 is a EN55022B compliant 40V, dual 4A or single 8A step-down or 50W inverting DC/DC µModule® regulator. The switching frequencies of both channels are set at 1.2MHz on DC2898A. If the output voltage collapses sufficiently due to an overload or short-circuit condition, the internal oscillator will foldback to one-fifth of the LTM4655’s programmed switching frequency, protecting the power switch from damage. The two channels can be paralleled for higher output current.

• SSFM jumper for spread spectrum options
• CLKIN inputs for external sync
• PGOOD signals for each output
• 13V to 40V input supply range
• 1.2MHz typical switching frequency
• 12V output voltage at VIN = 14V to 40V, IOUT = 0A to 4A
• 4A output current per output VIN = 13.5V
• 10mVP-P typical output ripple (across C23/C30) VIN = 28V, IOUT = 4A, 20MHz
• 89.5% efficiency at VIN = 28V, IOUT = 4A