Datasheet Summary
SGM3207 Unregulated 60mA Charge Pump Voltage Inverter
GENERAL DESCRIPTION
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 plete DC/DC charge pump inverter. Assembled in a small package, the plete converter can be built on a 50mm2 board area. Additional board area and ponent count reduction is achieved by replacing the Schottky diode that is typically...