Supply voltage apparatus with integrated gain adjustment and multiple supply monitoring
a technology of supply voltage and gain adjustment, applied in the field of electronic circuits, can solve the problems of circuit functionality still required, more complexity in a smaller size,
Active Publication Date: 2020-06-18
ANALOG DEVICES INT UNLTD
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Benefits of technology
This patent describes a power management circuit that can control a power converter circuit in a low power mode and an active mode. It includes a controller, an oscillator circuit, and a monitoring circuit. The monitoring circuit receives a regulated output voltage from the power converter circuit and compares it to a specified voltage threshold. If the regulated output voltage is greater than the threshold, the oscillator circuit is turned off, and if it is less than the threshold, the oscillator circuit is turned on. This allows the power management circuit to efficiently control the power converter circuit in different power modes.
Problems solved by technology
As electronic systems continue to evolve they require more complexity in a smaller size.
However, some circuit functionality is still required even when the electronic system is idle.
Method used
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[0024]Electronic systems may implement a low power mode to reduce power consumption. In a low power mode, some circuits of the electronic system are disabled to conserve the energy consumed by their operation. For some battery powered electronic systems it may be desired to implement an ultra-low power mode. In an ultra-low power mode, a significant portion of the electronic system spends above 99.9% of its time in the low power mode.
[0025]FIG. 1 is a block diagram of portions of an electronic system 100 that is operable in a low power mode and an active mode. The system includes a power management unit (PMU) 102 that handles all the power management routines required for a microcontroller based ultra-low power electronic system, such as among other things, power up, active mode regulation, low power or hibernate mode, power modes transition, alarms, and reset checks and handling. The circuitry of the electronic system 100 is divided into a gated circuitry area 104 where the power i...
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A power management unit comprises a controller, an oscillator circuit, and a monitoring circuit. The controller is configured to control operation of a power converter circuit in a low power mode and an active mode. The oscillator circuit is configured to generate clock signals in the low power mode to control the operation of the power converter circuit. The monitoring is circuit configured when in the low power mode to receive a regulated output voltage from the power converter circuit, compare the regulated output voltage to a specified voltage threshold, and turn off the oscillator circuit when the regulated output voltage is greater than the specified threshold voltage and turn on the oscillator circuit when the regulated output voltage is less than the specified threshold voltage.
Description
FIELD OF THE DISCLOSURE[0001]This document relates to electronic circuits, and in particular it relates to electronic circuits for managing power in electronic systems.BACKGROUND[0002]Electronic systems can include devices that require a regulated power source. Power converter circuits can be used to provide a circuit supply rail having a regulated voltage. As electronic systems continue to evolve they require more complexity in a smaller size. A power management unit refers to a portion of the electronic system that manages the circuit supply rails of an electronic system. Some electronic systems seek to reduce the power required during the time when the system is idle. However, some circuit functionality is still required even when the electronic system is idle. The present inventors have recognized a need for improved performance of power converter circuits.SUMMARY OF THE DISCLOSURE[0003]This document relates generally to power management circuits and methods of their operation. ...
Claims
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IPC IPC(8): G06F1/04H02M1/00G01R19/165
CPCG06F1/04H02M3/07H02M1/00G01R19/16552Y02B70/10H02M1/0041H02M1/0045H02M1/0032H02M3/072
Inventor SPAGGIARI, MICHELERUIZ, MIGUEL A.TEJADA, JOSE
Owner ANALOG DEVICES INT UNLTD