The TPSM365R6V3EVM evaluation board (EVM) allows for evaluation of TPSM365R6, a synchronous step-down DC/DC module capable of driving up to 0.6-A of load current from a wide input voltage of up to 65-V. This EVM is configured to provide a 3.3V fixed output voltage. The switching frequency is set to 1MHz, and can also be synced to an external signal. The EVM can also serve as an example for circuit layout and design for a user's end application. See the TPSM365R6, 3-V to 65-V Input, 600-mA, 4-μA No-Load IQ Synchronous Buck Converter Power Module in a HotRod™ QFN Package data sheet for additional features, detailed descriptions, and available options.
| EVM | U1 | FREQUENCY | SPREAD SPECTRUM | CURRENT | PIN 11 TRIM |
|---|---|---|---|---|---|
TPSM365R6V3EVM | TPSM365R6V3RDNR | Fixed (1MHz) | Disabled | 0.6 A | MODE/SYNC |
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Figure 1-1 shows a typical setup with the EVM. The VIN power terminal block (J1) is used for connection to the host input supply and the VOUT power terminal block (J4) is used for connection to the load.
The test points on the top of the board can be used for connecting to the input and output of the EVM. Table 1-1 describes each test point.
| Test Point(1) | Description |
|---|---|
| VINS+ | Sense line for measuring the input voltage. Not meant to be used to power the device. |
| VINS- | Ground test point located near the ground terminal of the high frequency bypass capacitor. Meant to be connected to the ground sense line for VIN, but can be used in place of a general ground test point. |
| VOUTS+ | Sense line test point for the output voltage. Do not connect to an output load. |
| VOUTS- | Ground test point located near the ground terminal of the output capacitors. Meant to be connected to the ground sense line for VOUT, but can be used in place of a general ground test point. |
| GND | Test points for ground connection. Not meant to be used as a ground connection for the input power supply. |
| EN | Input voltage scope monitor. Connect an oscilloscope probe to this set of points to measure input ripple voltage. |
| PGOOD | This test point is connected to the PGOOD pin from the IC. This test point is an open-drain output of the PGOOD pin. In this EVM configuration, the pin is pulled up to VOUT by R4. |
| EN | This test point is connected to the EN pin. By default, there is a pullup resistor R2 (RENT) to VIN to enable the IC. |
| SYNC | This test point is connected to the RT pin of the IC when the R4 (RMODE) is installed. In a MODE/SYNC trimmed part, this test point is connected to the SYNC pin of the IC. This can be connected to an external clock to synchronize the IC. In a MODE/SYNC configuration, make sure J6 is configured to the SYNC setting in order to hookup to an external clock signal. |
| VCC | This test point is connected to the VCC pin. |