The SGM3207 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 SGM3207 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 19kHz. SGM3207YN5G/TR资料下载
