SGM3206.pdf
No.10981
● Inverts Input Supply Voltage
● Up to 60mA Output Current
● Input Voltage Range from 1.4V to 5.5V
● Quiescent Current: 115μA (TYP)
● Integrated Active Schottky Diode for Start-Up into Load
● -40℃ to +85℃ Operating Temperature Range
● Available in Green SOT-23-5 Package
The SGM3206 generates an unregulated negative output voltage from an input voltage ranging from 1.4V to 5.5V. The device is typically supplied by a pre-regulated supply rail of 5V or 3.3V. Due to its wide input voltage range, two or three NiCd, NiMH, or alkaline battery cells, as well as one Li-ion cell can also power them. Only three external capacitors are required to build a complete DC/DC charge pump inverter. Assembled in a small package, the complete converter can be built on a 50mm2 board area. Additional board area and component count reduction is achieved by replacing the Schottky diode that is typically needed for start-up into load by integrated circuitry.
The SGM3206 can deliver a maximum output current of 60mA with a typical conversion efficiency of greater than 85% over a wide output current range. The fixed switching frequency is 47kHz.
