Rev 7/25/01

2

BOARD SCHEMATIC and LAYOUT

The SP6121 Demo Board is configured as a highly efficient, synchronous DC/DC buck

converter. It has been optimized to deliver excellent thermal and EMI performance.

FIGURE 1. SP6121 Demo Board – layer 1, top view.

FIGURE 2. SP6121 Demo Board, layer 4, top view.

The SP6121 Demo Board has four, 2 oz copper layers that provide improved

noise immunity and minimize power losses. Components are placed on the top and

bottom sides of the PCB as shown on Figures 1and 2. The row of pads (1 to 11) at the

edge of the board is designed for solderable pins such as the NAS Interplex forked pins

(17 x 42 mil cross section). Pin connections to the demo board circuit are indicated in

Figure 3. (Pad 11 is a no connect.)