Power-on protection circuits and electronic equipment

Abstract

The present application provides a power-on protection circuit, in particular to a power-on protection circuit of a power management module. The power-on protection circuit may be a one-level or multi-level protection circuit. The protection circuit includes a voltage input terminal, a voltage output terminal, and a ground terminal, a first capacitor C1 and a first resistor R1 are sequentially connected between the voltage input terminal and the ground terminal; a parallel circuit composed of a first PMOS transistor M1, a second resistor R2, and a first diode string connected between the voltage input terminal and the voltage output terminal, wherein the source of the first PMOS transistor M1 is connected to the voltage input terminal, the drain is connected to the voltage output terminal, and the gate is connected to the first PMOS transistor M1 Between a capacitor C1 and the first resistor R1, a load is connected between the ground terminal and the voltage output terminal. The power-on protection circuit of this application has the characteristics of easy implementation, small chip area occupation, high reliability, and wide dynamic range. .

Description

technical field [0001] The present application relates to the field of microelectronic technology, in particular to a power-on protection circuit of a power management module and electronic equipment. Background technique [0002] In microelectronic circuit design, the power management module is an essential part of the system. When the external power supply supplies power to the internal circuit, the voltage rise time is very short, which may cause the voltage of some nodes of the internal circuit to rise suddenly, causing some devices, such as diodes, triodes and MOS tubes, to be broken down or even burned out. . Therefore, usually in the power management module, a power-on protection circuit is required to provide a slowly rising voltage to the internal circuit to achieve the effect of protection, also known as soft start, but the dynamic range of the output voltage in the prior art is often relatively narrow . [0003] The power-on protection circuit of the present ap...

AI Technical Summary

Problems solved by technology

When the external power supply supplies power to the internal circuit, the voltage rise time is very short, which may cause the voltage of some nodes of the internal circuit to rise suddenly, causing some devices, such as diodes, triodes and MOS tubes, to be broken down or even burned out.

Therefore, usually in the power management module, a power-on protection circuit is required to provide a slowly rising voltage to the internal circuit to achieve the effect of protection, also known as soft start, but the dynamic range of the output voltage in the prior art is often relatively narrow

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