A high-voltage voltage regulator circuit with reverse connection protection

Abstract

The invention provides a high-voltage voltage stabilizer circuit with reverse connection protection, including a voltage input module with reverse connection protection, an internal power supply module and a low-voltage voltage stabilizer module; the voltage input module is used to input the input voltage VIN into the circuit, and has a The input power supply VIN and ground are connected to the reverse direction protection function and have the function of anti-voltage inversion. The internal power supply module is used to supply power to the charge pump and clock module, and provides a sufficiently high gate voltage to ensure the minimum operating voltage of the low-voltage regulator module. The low-voltage voltage regulator module further regulates the pre-regulated voltage generated by the internal power supply module, and provides accurate VREG voltage power supply to the chip. The invention has the advantages of wide input, stable output voltage, damage to the chip by ground reverse connection, prevention of voltage backflow, etc., and can be used for power supply of the internal circuit of the chip. The invention can prevent the large current generated when the power supply and the ground are reversely connected, and avoid chip damage; at the same time, it can also prevent the voltage backflow when the input voltage is lower than the internal output voltage.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a high-voltage voltage stabilizing circuit with reverse connection protection. Background technique [0002] Regulators for converting wide input voltages into usable voltage regulators, for example, buck regulators (converters) that convert unregulated power from a DC power source to regulated voltages and currents that can be used for loads , thus, tablet computers, notebook computers, portable computers, digital cameras, digital video cameras, handheld game consoles, wearable devices (glasses, wristbands, watches, armbands, headphones, etc.), etc. [0003] It is common to use voltage regulators in the market now, but most of them have no protection against reverse connection of power supply and ground, especially in the case of high voltage input and high current discharge. Once such a voltage stabilizer is reversed, it will cause a short circuit or even burn components and ...

AI Technical Summary

Problems solved by technology

However, the above scheme cannot achieve reverse connection protection.

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