A low-profile multilayer cushion assembly which can be used to support the human body under various conditions. The elastic laminate web can be nonapertured or apertured, and comprises a first web, and a second web joined to the first web in a face to face relationship at a plurality of discrete bond sites having an aspect ratio of at least 2. When a pre-bias condition is not present, the output of the digital ramp generator may control a digital-to-analog converter, which may be configured to generate the reference voltage for the power regulator.