Overview

Product Details

Demonstration circuit 1905B features the LTM4633EY, a high efficiency, triple output step-down power μModule® regulator. The input voltage range is from 4.7V to 16V with a common input source, or 2.375V to 16V with an external bias supply. The output voltage range is 0.8V to 1.8V for channels 1 and 2, and 0.8V to 5.5V for channel 3. Derating is necessary for certain VIN, VOUT, frequency, and thermal conditions. See Table 1 in the user guide for Thermally Viable Operating Conditions. The DC1905B offers access to the TRACK/SS pins, allowing the user to program output tracking or soft-start period. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP4) selects pulse-skipping mode for noise sensitive applications or Burst Mode® operation in less noise sensitive applications. Channels 1 and 2 can be connected in parallel for a single 20A output solution with optional jumper resistors. The LTM4633 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit 1905B.

Applicable Parts

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