Description
●The TPS6040x family of devices generates an unregulated negative output voltage from an input voltage ranging from 1.6 V to 5.5 V. The devices are typically supplied by a preregulated supply rail of 5 V or 3.3 V. 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 1-µF capacitors are required to build a complete DC-DC charge pump inverter. Assembled in a 5-pin SOT-23 package, the complete converter can be built on a 50-mm2 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.
●Features
●• Inverts Input Supply Voltage
●• Up to 60-mA Output Current
●• Only Three Small 1-µF Ceramic Capacitors Needed
●• Input Voltage Range From 1.6 V to 5.5 V
●• PowerSave-Mode for Improved Efficiency at Low Output Currents (TPS60400)
●• Device Quiescent Current Typical 65 µA
●• Integrated Active Schottky-Diode for Start-up Into Load
●• Small 5-Pin SOT-23 Package
●• Evaluation Module Available TPS60400EVM-178
●Applications
●• LCD Bias
●• GaAs Bias for RF Power Amps
●• Sensor Supply in Portable Instruments
●• Bipolar Amplifier Supply
●• Medical Instruments
●• Battery-Operated Equipment
