SNVSB89A November 2018 – July 2019 LM25180-Q1
PRODUCTION DATA.
Refer to the PDF data sheet for device specific package drawings
Install a 130-kΩ resistor from SW to FB based on the secondary winding voltage (the sum of the 5-V output voltage and the Schottky diode forward voltage drop) reflected by the relevant transformer turns ratio, which in this design is 1 : 0.4 or 2.5 : 1.