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Design LM2776
SNVSA56B – MAY 2015 – REVISED FEBRUARY 2017 LM2776 Switched Capacitor Inverter
1 Features 3 Description The LM2776 CMOS charge-pump voltage converter
inverts a positive voltage in the range from 2.7 V to
5.5 V to the corresponding negative voltage. The
LM2776 uses three low-cost capacitors to provide
200 mA of output current without the cost, size, and
electromagnetic interference (EMI) related to
inductor-based converters. 1 Input Voltage: 2.7 V to 5.5 V
200-mA Output Current
Inverts Input Supply Voltage
Low-Current PFM Mode Operation
2-MHz Switching Frequency
Greater than 90% Efficiency
Current Limit and Thermal Protection
No Inductors With an operating current of only 100 ОјA and
operating efficiency greater than 90% at most loads, …
