SG Micro Corp

SGM3204 Unregulated 200mA Charge Pump Voltage Inverter

GENERAL DESCRIPTION

The SGM3204 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 SGM3204 can deliver a maximum output current of 200mA with a typical conversion efficiency of greater than 80% over a wide output current range.

The SGM3204 is available in SOT-23-6 package. It operates over an ambient temperature range of -40 to +85.


PIN CONFIGURATIONS


FEATURES

• Inverts Input Supply Voltage
• Up to 200mA Output Current
• Input Voltage Range from 1.4V to 5.5V
• Quiescent Current: 1.5mA (TYP)
• 950kHz Switching Frequency
• Integrated Active Schottky Diode for Start-Up into  Load
• -40
 to +85 Operating Temperature Range
• Available in Green SOT-23-6 Package

APPLICATIONS

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


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM3204YN6G/TR Production SOT-23-6 6 Y -40℃ to +85℃ Samples

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