Texas Instruments recommends a star-ground configuration, with the analog and digital grounds separated and connected at a single point. Additionally, keep the input and output traces short and away from noise sources, and use a solid ground plane to reduce EMI.
To ensure stability, use a compensation capacitor (Cc) between pins 1 and 8, and a bypass capacitor (Cb) between pin 7 and ground. The values of these capacitors depend on the specific application and can be calculated using the equations provided in the datasheet.
The maximum power dissipation of the LM1973MX is dependent on the package type and ambient temperature. For the MX package, the maximum power dissipation is 1.4W. To calculate the power dissipation, use the equation: Pd = (Vin - Vout) x Iout + (Vin x Iq), where Vin is the input voltage, Vout is the output voltage, Iout is the output current, and Iq is the quiescent current.
Yes, the LM1973MX can be used as a voltage regulator with a variable output voltage. To do this, connect a resistive divider network between the output and the adjust pin (pin 1), and use an external voltage reference to set the desired output voltage.
To protect the LM1973MX from input voltage transients and surges, use a transient voltage suppressor (TVS) diode or a voltage clamp circuit at the input. Additionally, use a fuse or a current-limiting resistor in series with the input to prevent overcurrent conditions.
LM1973MX/NOPB datasheet
by Texas Instruments
