SNVS852D June 2012 – August 2018 LMZ20502
The LMZ20502 Nano Module is a voltage mode buck regulator with an integrated inductor. Input voltage feed-forward is used to compensate for loop gain variation with input voltage. Two operating modes allow the user to tailor the regulator to their specific requirements. In forced PWM mode, the regulator operates as a full synchronous device with a 3 MHz (typ.) switching frequency and very low output voltage ripple. In AUTO mode, the regulator moves into PFM when the load current drops below the mode change threshold (see Application Curves). In PFM, the device regulates the output voltage between wider ripple limits than in PWM. This results in much smaller supply current than in PWM, at light loads and high efficiency. A simplified block diagram is shown in Functional Block Diagram.