SLVU777A September 2012 – November 2021 TPS54020
The EVM is provided with input/output connectors and test points as shown in Table 2-1. A power supply capable of supplying 5 A must be connected to J1, and a pair of 20-AWG wires is recommended. The jumper across J2 must be in place across pins 1 and 2. See Section 1.3.4 for split-input voltage rail operation. The load must be connected to J3 and a pair of 20-AWG wires is recommended. The load must be capable of drawing 10 A at 1.8 V. Wire lengths should be minimized to reduce losses in the wires. Test-point TP1 provides a place to monitor the PVIN input voltages with TP6 providing a convenient ground reference. TP5 is used to monitor the output voltage with TP8 as the ground reference.
| Reference Designator | Function |
|---|---|
| J1 | PVIN input voltage connector. (See Table 1-1 for VIN range.) |
| J2 | PVIN to VIN jumper. Shunt SH1 is normally connected from pin 1 to pin 2 to tie VIN to PVIN for common rail voltage operation. |
| J3 | VOUT, 1.8 V at 10-A maximum. |
| J4 | VIN input voltage connector. Not normally used. |
| J5 | 2-pin header for enable. Connect EN to ground to disable, open to enable. |
| J6 | 2-pin header used to for sequencing via the slow start voltage. |
| TP1 | Test point for PVIN. |
| TP2 | Test point for Power Good. Biased from VOUT. |
| TP3 | Test point for SYNC OUT. In RT mode, this is a clock output. In SYNC mode, this is a digital input. |
| TP4 | Test point for VIN. |
| TP5 | Test point for VOUT. |
| TP6 | Test point for PGND, near input. |
| TP7 | Test point for PH, or Switch Node. |
| TP8 | Test point for PGND, near output. |
| TP9 | Test point between voltage divider network and output. Used for loop response measurements. |
| TP10 | Test point for ENABLE. |
| TP11 | Test point for the timing resistor RT and Clock. |
| TP12 | Test point for slow start. |
| TP13 | Test point for AGND. |
| TP14 | Test point for AGND. |