SLVUAT2A November 2016 – February 2022 TPSM84A21 , TPSM84A22
Wire-loop test points and scope probe test points are provided as convenient connection points for digital voltmeters (DVM) or oscilloscope probes to aid in the evaluation of the device. A BNC connector footprint (J3) is available if a synchronization clock is required. Table 3-1 lists a description of each test point.
| Pin | Description |
|---|---|
| VIN | Input voltage monitor. Connect DVM to this point for measuring efficiency. |
| VOUT | Output voltage monitor. Connect DVM to this point for measuring efficiency, line regulation, and load regulation. |
| PGND | Input and output voltage monitor grounds. Reference the previously mentioned DVMs to any of these four analog ground points. |
| VIN Scope (J1) | Input voltage scope monitor. Connect an oscilloscope to this set of points to measure input ripple voltage. |
| VOUT Scope (J2) | Output voltage scope monitor. Connect an oscilloscope to this set of points to measure output ripple voltage and transient response. |
| EN/UVLO | Connect this point to control ground to disable the device. Allow this point to float to enable the device. An external resistor divider can be connected between this point, control ground, and VIN to adjust the undervoltage lockout of the device. |
| PGOOD | Monitors the power good signal of the device. This is an open-drain signal that requires an external pullup resistor if monitoring is desired. A 10- to 100-kΩ pullup resistor is recommended. PWRGD is high if the output voltage is within 95% to 105% of its nominal value. |
| SYNC (J3) | Connects to the RT/CLK pin of the device. An external clock signal can be applied to this point to synchronize the device to an appropriate frequency. |
| VG | Gate driver supply pin. If supplying an external 5-V supply, connect to this test point. |
Refer to the appropriate product data sheet for absolute maximum ratings associated with the previously-listed features: