Voltage regulation system, voltage regulation chip and voltage regulation control method

Abstract

A voltage regulation system, a voltage regulation chip and a voltage regulation control method are provided. The voltage regulation control method includes the steps of disabling a first regulator, and electrically connecting an input terminal of a second regulator to a power supply terminal; setting a voltage on a second terminal of a first transistor of the first regulator to a ground voltage for a predetermined period; next, turning off the first transistor and the second transistor of the first regulator; next, activating the second regulator, and detecting the voltage on the second terminal of the first transistor; when the voltage on the second terminal of the first transistor is equal to the voltage on the power supply terminal, determining that an inductor electrically connected between the first regulator and the second regulator; otherwise, determining that first regulator and the second regulator are not electrically connected to each other.

Description

technical field [0001] The invention relates to a voltage stabilizing technology, in particular to a voltage stabilizing system, a voltage stabilizing chip and a voltage stabilizing control method in which different types of voltage stabilizing circuits are connected in series and combined with inductance detection. Background technique [0002] In recent years, in response to the demand for low static power, MCU or other similar SOC and Embedded systems have begun to use DC / DC regulators instead of traditional linear regulators. [0003] Switching power regulators are much more efficient than linear regulators. For example, the efficiency of a switching regulator used in a power system with an input power of 3.3V and an output voltage of 1.2V can be higher than 80%, while the maximum efficiency of a linear regulator is only 36%, which is a difference of more than 44%. [0004] Although the switching power supply regulator has the obvious advantage of high efficiency, but b...

AI Technical Summary

Problems solved by technology

[0004] Although the switching power supply regulator has the obvious advantage of high efficiency, but because the switching power supply regulator is characterized by using power devices as switches, there will be a circuit node in the circuit with a switching signal from 0 to the power supply level, and this The node will output a large current

Such a fast switching level may cause obvious power supply bouncing (bouncing), or interfere with the operation of other circuits, such as EMI / EMC

[0005] Nowadays, more and more MCUs integrate switching and linear voltage regulators in the same chip, allowing users to decide which regulator to use, but it may also cause the system to fail to know the external circuit when it is turned on. Whether the connection is in the form of a switching power supply or a linear voltage regulator

Images