Monolithic integrated semiconductor chip for chopper circuit and preparation method thereof

Abstract

The embodiment of the invention provides a monolithic integration semiconductor chip for a chopper circuit and a manufacturing method thereof. The semiconductor chip comprises a main control switch MOSFET, a synchronous rectification MOSFET and a CMOS logic driving chip, wherein the first source region of the main control switch MOSFET and the second drain region of the synchronous rectification MOSFET are interconnected through a metal interconnection wire and used as a first reserved interface VSW for the semiconductor chip; the first gate structure of the main control switch MOSFET and thesecond gate structure of the synchronous rectification MOSFET are connected with output nodes of a first CMOS and a second CMOS in the CMOS logic driving chip; and the first drain region of the main control switch MOSFET leads out a second reserved interface Vin of the semiconductor chip through the metal interconnection wire. When the scheme provided in the embodiment of the invention is applied,the size of the chopper circuit can be reduced, the parasitic parameters are reduced, and the power density and the reliability are thus improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power electronics, and in particular to a monolithic integrated semiconductor chip for a chopper circuit and a manufacturing method thereof. Background technique [0002] A switching power supply is a power supply that uses modern power electronics technology to control the time ratio of switching transistors on and off to maintain a stable output voltage. Switching power supply is generally composed of PWM (Pulse Width Modulation, pulse width modulation) control ICs (Integrated Circuits, integrated circuits) and MOSFET (Metal-Oxide-SemiconductorField-Effect Transistor, Metal-Oxide-Semiconductor Field-Effect Transistor). [0003] With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. At present, switching power supply is widely used in almost all electronic devices due to its small size, light weight and high ...

AI Technical Summary

Problems solved by technology

[0006] Since the main control switching device and the synchronous rectification device as the core power device of the chopper circuit in the existing chopper circuit are two independent devices, the core power device occupies a large volume, resulting in a large volume of the chopper circuit; and , the external wiring connection between the main control switching device and the synchronous rectification device, and the external wiring connection between the core power device and the drive control circuit will increase parasitic parameters and reduce reliability

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