SGM3207YN5G/TR

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. The SGM3207 is available in SOT-23-5 package. It operates over an ambient temperature range of -40°C to +85°C.

Applications

• LCD Bias
• GaAs Bias for RF Power Amps
• Sensor Supply in Portable Instruments
• Bipolar Amplifier Supply

Key features

• Inverts Input Supply Voltage
• Up to 60mA Output Current
• Input Voltage Range from 1.4V to 5.5V
• Quiescent Current: 72μA (TYP)
• Integrated Active Schottky Diode for Start-Up into Load
• -40°C to +85°C Operating Temperature Range
• Available in Green SOT-23-5 Package