JAJSAH6H January 2006 – October 2017 LM3100
PRODUCTION DATA.
The feedback voltage at FB pin is compared to the internal reference voltage of 0.8 V. In normal operation (the output voltage is regulated), an on-time period is initiated when the voltage at FB falls below 0.8 V. The buck switch stays on for the on-time, causing the FB voltage to rise above 0.8 V. After the on-time period, the buck switch stays off until the FB voltage falls below 0.8 V again. Bias current at the FB pin is nominally 100 nA.