SNVU283B August 2013 – December 2021 LMZ31520 , LMZ31530
Seven wire-loop test points and three scope probe test points have been provided as convenient connection points for digital voltmeters (DVM) or oscilloscope probes to aid in the evaluation of the device. A description of each test point follows:
| PVIN | 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 above DVMs to the corresponding ground point. |
| PVIN Scope (J6) | Input voltage scope monitor. Connect an oscilloscope to this set of points to measure input ripple voltage. |
| VOUT Scope (J7) | Output voltage scope monitor. Connect an oscilloscope to this set of points to measure output ripple voltage and transient response. |
| VOUT Scope (J5) | Output voltage scope monitor. Insert an oscilloscope into the test point adapter to measure output ripple voltage and transient response. |
| PWRGD | Monitors the power-good signal of the device. A 100-kΩ pullup resistor is included internal to the device and is tied to 5 V. PWRGD is high if the output voltage is within 95% to 110% of its nominal value. |
| INH | Connect this point to control ground to inhibit the device. Allow this point to float to enable the device. |