Switching Power Supply Design Based on Charge Pump DC-DC Converter
A low-cost and high-efficiency switching power supply based on charge pump and Boost boost circuit is designed to supply power to positive and negative dual-source op-amps.The Boost module is used to boost the input voltage from 3 to 4.5 V to a stable 5.5 V.The 5.5 V voltage is converted into a positive and negative 5 V output voltage by a charge pump negative voltage circuit,a charge pump doubler circuit,and a TL431 series regulator circuit to supply power to the op-amp.The circuit is simulated by simulation software,and the simulated waveforms of important nodes and output voltage and current are analysed to ensure that a stable output voltage of±5 V with a ripple of 2％or less is provided in the DC input voltage range of 3-4.5 V.
charge pumpnegative voltageboost circuitswitching power supply
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