Part: pth12020w
Question:
Two Engineers at QC disagree about which Pin is best used to disable the pth12020w.
Which Pin (Function) is it most appropriate to enable and disable the pth12020w, such that its output is disabled and it draws minimum power while disabled. Pin3 (Inhibit) or Pin8 (Track)?
Data Sheet Pin (Function) Description:
Inhibit 3
The Inhibit pin is an open-collector/drain negative logic input that is referenced to GND. Applying a lowlevel ground signal to this input disables the module’s output and turns off the output voltage. When the Inhibit control is active, the input current drawn by the regulator is significantly reduced. If the inhibit feature is not used, the control pin should be left open-circuit. The module will then produce an output whenever a valid input source is applied. Do not place an external pull-up on this pin. For power-up into a non-prebiased output, it is recommended that AutoTrack be utilized for On/Off control. See the Application Information for additional details.
Track 8
This is an analog control input that enables the output voltage to follow an external voltage. This pin becomes active typically 20 ms after the input voltage has been applied, and allows direct control of the output voltage from 0 V up to the nominal set-point voltage. Within this range the output will follow the voltage at the Track pin on a volt-for-volt basis. When the control voltage is raised above this range, the module regulates at its set-point voltage. The feature allows the output voltage to rise simultaneously with other modules powered from the same input bus. If unused this input should be connected to Vin. NOTE: Due to the under-voltage lock
