DCDC conversion circuit with ultra-low voltage starting and double-path output and implementation method thereof

Abstract

The invention provides a DCDC conversion circuit with ultra-low voltage starting and double-path output and an implementation method thereof. The DCDC conversion circuit comprises a two-way output module, a high-voltage power-on reset module electrically connected to the double-path output module, a power tube substrate level selection module electrically connected to the high-voltage power-on reset module and the double-path output module, a working mode switching module electrically connected to the high-voltage power-on reset module and the double-path output module, a control tube substrate level selection module electrically connected to the working mode switching module, a load access module electrically connected to the double-path output module, and a modulation signal generationmodule electrically connected to the double-path output module, the load access module and the working mode switching module. The DCDC conversion circuit solves the problems that an existing DCDC conversion circuit cannot work under low power supply voltage, an additional clock generation device is needed, and only one path of output is needed.

Description

technical field [0001] The invention belongs to the field of circuit design, in particular to an ultra-low voltage starting dual-output DC-DC conversion circuit and a realization method thereof. Background technique [0002] DCDC conversion circuits are widely used in various on-board chips and IoT chips. This kind of circuit can reasonably adjust the power supply voltage of the chip according to the applicable situation, and at the same time generate stable voltage or current supply under the condition of ensuring external power supply voltage and load fluctuations. [0003] The structure of the classic DCDC conversion circuit is as follows: figure 1 As shown, in order to ensure the generation of the modulation signal, the input voltage V in Must be greater than 1.4V to 1.8V. The structure of the conventional synchronous DCDC conversion circuit is as follows: figure 2 As shown, the diode is replaced by a PMOS tube; in order to ensure the generation of the modulation sig...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an ultra-low voltage starting dual-output DCDC conversion circuit and its implementation method, which are used to solve the problem that the existing DCDC conversion circuit cannot operate under low power supply voltage. work, need for additional clock generators, and only one output

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