SNVU768 December 2021 LM63440-Q1 , LM63460-Q1 , LM64440-Q1 , LM64460-Q1
Referencing the EVM connections described in Table 4-1, use the recommended test setup in Figure 4-1 to evaluate the LM63460-Q1 and LM64460-Q1 converter. Working at an ESD-protected workstation, make sure that any wrist straps, bootstraps, or mats are connected and referencing the user to earth ground before power is applied to the EVM.
| LABEL | DESCRIPTION |
|---|---|
| VIN+ | Positive input power connection |
| VIN– | Negative input power connection |
| VOUT+ | Positive output power connection |
| VOUT– | Negative output power connection |
| LABEL(1) | DESCRIPTION |
|---|---|
| VIN+ (TP1) | Positive input sense terminal. Connect the multimeter positive lead for measuring efficiency. |
| VIN– (TP2) | Negative input sense terminal. Connect a multimeter negative lead for measuring efficiency. |
| VOUT+ (TP3) | Positive output sense terminal. Connect a multimeter positive lead for measuring efficiency and line/load regulation. |
| VOUT– (TP4) | Negative output sense terminal. Connect the multimeter negative lead for measuring efficiency and line/load regulation. |
| GND | Ground reference point at J3 |
| EN | Precision enable input. Tie EN to GND to disable the regulator. Use a logic signal to control EN for remote ON/OFF functionality. Leave EN open for UVLO turn-on threshold set at 4.5 V. |
| SYNC | Synchronization input (connects to the EN/SYNC or MODE/SYNC pins of the LM63460-Q1 and LM64460-Q1, respectively). Connect a valid clock signal to synchronize the switching frequency from 200 kHz to 2.2 MHz. |
| VCC | VCC output |
| PGD | Power-good monitor output. This is an open-drain flag with a 100-kΩ pullup resistor to VOUT. |
| INJ, VOUT | Bode plot measurement and signal injection using a 50-Ω resistor from INJ to VOUT |
| BIAS | External bias supply connection. A 1-Ω resistor from VOUT to BIAS simplifies bias current measurement. |