SNVS852D June 2012 – August 2018 LMZ20502
Please refer to Table 1 and the following paragraphs for a detailed description of the functional modes of the LMZ20502. These modes are controlled by the MODE input as shown in Table 1. The maximum voltage on the MODE pin is 5.5 V or VIN, whichever is smaller. This input must not be allowed to float.
|MODE PIN VOLTAGE||OPERATION|
|> 1.2 V||Forced PWM: The regulator operates in constant frequency, PWM mode for all loads from no-load to full load; no diode emulation is used.|
|< 0.4 V||AUTO Mode: The regulator operates in constant frequency mode for loads greater than the mode change threshold. For loads less than the mode change threshold, the regulator operates in PFM with diode emulation.|