SNVSAH6C June 2018 – May 2021 LM2775-Q1
PRODUCTION DATA
Charge-pump efficiency is derived in Equation 3 and Equation 4 (supply current and other losses are neglected for simplicity):
If one includes the quiescent current drawn by the LM2775-Q1 to operate, the following can be derived :
In Equation 3, G represents the charge pump gain. Efficiency is at its highest as G × VIN approaches VOUT. For the LM2775-Q1 device, G = 2.