SP6121CN-L Datasheet, PDF (34/42 Pages) Sipex Corporation – Low Voltage, Synchronous Step Down PWM Controller

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.)
Rev 7/25/01
2