1 High-Density EVM Description

The TPSM63610EVM features the TPSM63610 synchronous buck power module configured for operation with typical 3-V to 36-V input bus applications. This wide-V_IN range DC/DC solution offers outsized voltage rating and operating margin to withstand supply-rail voltage transients.

The output voltage can be set to either 3.3 V or 5 V and switching frequency can each be set to one of five popular values (400 kHz, 700 kHz, 1 MHz, 1.4 MHz, and 2.2 MHz) by using configuration jumpers. Additionally, a resistor placeholder footprint is on the backside of the EVM to allow adjustment of the switching frequency outside of the five jumper settings.

The EVM provides the full 8-A output current rating of the device. The selected input and output capacitors accommodate the entire range of input voltage and the selectable output voltages on the EVM and are available from multiple component vendors. Input and output voltage sense terminals and a test point header facilitate measurement of the following:

• Efficiency and power dissipation
• Line and load regulation
• Load transient response
• Enable ON, OFF
• Bode plot (crossover frequency and phase margin)

The header also provides connections for features such as remote enable (EN), external clock synchronization through mode pin (MODE), power-good monitor (PGOOD), spread-spectrum frequency modulation (SPSP) and AUTO/FPWM mode control (MODE). The recommended PCB layout maximizes thermal performance and minimizes output ripple and noise.

A 0-Ω resistor is placed between RBOOT and CBOOT to short the internal 100-Ω resistor for highest efficiency. Modifying the 0-Ω resistor allows adjustment of the internal resistance to balance EMI and efficiency performance.