Datasheet

Layout of the EVM
1-4
TPS60100 and TPS60110 EVM
(see Table 1–2). Each connector has the supply (In) signal at the first pin, the
logic input at the second pin, and the ground (GND) signal at the third pin. So
it is possible to use jumpers to connect the pin either to input (supply voltage)
or to ground. It is also possible to connect any other signal by using an external
signal source and connecting it to the second pin. These five pins are logic lev-
el CMOS inputs; for the specification of the levels, refer to the datasheets. The
value of the signal connected to the logic pins can be higher than the supply
voltage, but do not exceed the maximum ratings (see datasheets).
Leaving the second pin of these five three-pin connectors open is not allowed ;
either connect it via a jumper to the first or third pin, or use an appropriate exter-
nal signal source with the appropriate signal level.
Table 1–2.Selected Modes by Connecting the Jumpers
Name Connected to GND (Pin 3) Connected to In (Pin 1)
3V8 3.3 V at the output
(TPS60110: internal clock is used)
3.8 V at the output
(TPS60110: Do not connect to IN)
Com Push-pull mode Single-ended mode
EN Device is disabled Device is enabled
Skip Fixed-frequency mode Pulse-skip mode
Sync Device is internally synchronized Device is externally synchronized, connect the external
clock to the second pin of connector 3V8.
1.3 Layout of the EVM
Figure 1–2 and Figure 1–3 show the placement of the components and the lay-
out of the EVM. Components are placed only on the top layer of the board. The
signal on the bottom is the ground signal (GND). For good performance, the
entire bottom layer is one GND plane, only interrupted by some vias.
Figure 1–2. Placement of the Components